diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compact.css
new file mode 100644
index 0000000000..e64fe21e79
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 20; test-2: 10 +10; test-3: 20; test-4: 20; test-5: 20px; test-6: 10 +10px; test-7: 20px; test-8: 20px; test-9: 10+10px; test-10: 10 +10px; test-11: 10+ 10px; test-12: 10 + 10px; test-13: 110px; test-14: 110px; test-15: 110px; test-16: 110px; test-17: 20px; test-18: 20px; test-19: 20px; test-20: 20px; test-21: 20px; test-22: 20px; test-23: 20px; test-24: 20px; test-25: 20px; test-26: 10px +10px; test-27: 20px; test-28: 20px; test-29: 10px+10px; test-30: 10px +10px; test-31: 10px+ 10px; test-32: 10px + 10px; test-33: 11px0px; test-34: 11px0px; test-35: 11px0px; test-36: 11px0px; test-37: 20pxpx; test-38: 20pxpx; test-39: 20pxpx; test-40: 20pxpx; test-41: 20pxpx; test-42: 20pxpx; test-43: 20pxpx; test-44: 20pxpx; test-45: 10px+10px; test-46: 10px +10px; test-47: 10px+ 10px; test-48: 10px + 10px; test-49: 10px10px; test-50: 10px10px; test-51: 10px10px; test-52: 10px10px; test-53: 10px10px; test-54: 10px10px; test-55: 10px10px; test-56: 10px10px; test-57: 10px10px; test-58: 10px10px; test-59: 10px10px; test-60: 10px10px; test-61: 10px10px; test-62: 10px10px; test-63: 10px10px; test-64: 10px10px; test-65: 10px10px; test-66: 10px10px; test-67: 10px10px; test-68: 10px10px; test-69: 10px10px; test-70: 10px10px; test-71: 10px10px; test-72: 10px10px; test-73: 10px+10px; test-74: 10px +10px; test-75: 10px+ 10px; test-76: 10px + 10px; test-77: 10px+10px; test-78: 10px +10px; test-79: 10px+ 10px; test-80: 10px + 10px; test-81: 10px10px; test-82: 10px10px; test-83: 10px10px; test-84: 10px10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compressed.css
new file mode 100644
index 0000000000..6fa198ce88
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:20;test-2:10 +10;test-3:20;test-4:20;test-5:20px;test-6:10 +10px;test-7:20px;test-8:20px;test-9:10+10px;test-10:10 +10px;test-11:10+ 10px;test-12:10 + 10px;test-13:110px;test-14:110px;test-15:110px;test-16:110px;test-17:20px;test-18:20px;test-19:20px;test-20:20px;test-21:20px;test-22:20px;test-23:20px;test-24:20px;test-25:20px;test-26:10px +10px;test-27:20px;test-28:20px;test-29:10px+10px;test-30:10px +10px;test-31:10px+ 10px;test-32:10px + 10px;test-33:11px0px;test-34:11px0px;test-35:11px0px;test-36:11px0px;test-37:20pxpx;test-38:20pxpx;test-39:20pxpx;test-40:20pxpx;test-41:20pxpx;test-42:20pxpx;test-43:20pxpx;test-44:20pxpx;test-45:10px+10px;test-46:10px +10px;test-47:10px+ 10px;test-48:10px + 10px;test-49:10px10px;test-50:10px10px;test-51:10px10px;test-52:10px10px;test-53:10px10px;test-54:10px10px;test-55:10px10px;test-56:10px10px;test-57:10px10px;test-58:10px10px;test-59:10px10px;test-60:10px10px;test-61:10px10px;test-62:10px10px;test-63:10px10px;test-64:10px10px;test-65:10px10px;test-66:10px10px;test-67:10px10px;test-68:10px10px;test-69:10px10px;test-70:10px10px;test-71:10px10px;test-72:10px10px;test-73:10px+10px;test-74:10px +10px;test-75:10px+ 10px;test-76:10px + 10px;test-77:10px+10px;test-78:10px +10px;test-79:10px+ 10px;test-80:10px + 10px;test-81:10px10px;test-82:10px10px;test-83:10px10px;test-84:10px10px}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.expanded.css
new file mode 100644
index 0000000000..1efb9e0174
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected.expanded.css
@@ -0,0 +1,86 @@
+foo {
+  test-1: 20;
+  test-2: 10 +10;
+  test-3: 20;
+  test-4: 20;
+  test-5: 20px;
+  test-6: 10 +10px;
+  test-7: 20px;
+  test-8: 20px;
+  test-9: 10+10px;
+  test-10: 10 +10px;
+  test-11: 10+ 10px;
+  test-12: 10 + 10px;
+  test-13: 110px;
+  test-14: 110px;
+  test-15: 110px;
+  test-16: 110px;
+  test-17: 20px;
+  test-18: 20px;
+  test-19: 20px;
+  test-20: 20px;
+  test-21: 20px;
+  test-22: 20px;
+  test-23: 20px;
+  test-24: 20px;
+  test-25: 20px;
+  test-26: 10px +10px;
+  test-27: 20px;
+  test-28: 20px;
+  test-29: 10px+10px;
+  test-30: 10px +10px;
+  test-31: 10px+ 10px;
+  test-32: 10px + 10px;
+  test-33: 11px0px;
+  test-34: 11px0px;
+  test-35: 11px0px;
+  test-36: 11px0px;
+  test-37: 20pxpx;
+  test-38: 20pxpx;
+  test-39: 20pxpx;
+  test-40: 20pxpx;
+  test-41: 20pxpx;
+  test-42: 20pxpx;
+  test-43: 20pxpx;
+  test-44: 20pxpx;
+  test-45: 10px+10px;
+  test-46: 10px +10px;
+  test-47: 10px+ 10px;
+  test-48: 10px + 10px;
+  test-49: 10px10px;
+  test-50: 10px10px;
+  test-51: 10px10px;
+  test-52: 10px10px;
+  test-53: 10px10px;
+  test-54: 10px10px;
+  test-55: 10px10px;
+  test-56: 10px10px;
+  test-57: 10px10px;
+  test-58: 10px10px;
+  test-59: 10px10px;
+  test-60: 10px10px;
+  test-61: 10px10px;
+  test-62: 10px10px;
+  test-63: 10px10px;
+  test-64: 10px10px;
+  test-65: 10px10px;
+  test-66: 10px10px;
+  test-67: 10px10px;
+  test-68: 10px10px;
+  test-69: 10px10px;
+  test-70: 10px10px;
+  test-71: 10px10px;
+  test-72: 10px10px;
+  test-73: 10px+10px;
+  test-74: 10px +10px;
+  test-75: 10px+ 10px;
+  test-76: 10px + 10px;
+  test-77: 10px+10px;
+  test-78: 10px +10px;
+  test-79: 10px+ 10px;
+  test-80: 10px + 10px;
+  test-81: 10px10px;
+  test-82: 10px10px;
+  test-83: 10px10px;
+  test-84: 10px10px;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..8b463f47ce
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/expected_output.css
@@ -0,0 +1,85 @@
+foo {
+  test-1: 20;
+  test-2: 10 +10;
+  test-3: 20;
+  test-4: 20;
+  test-5: 20px;
+  test-6: 10 +10px;
+  test-7: 20px;
+  test-8: 20px;
+  test-9: 10+10px;
+  test-10: 10 +10px;
+  test-11: 10+ 10px;
+  test-12: 10 + 10px;
+  test-13: 110px;
+  test-14: 110px;
+  test-15: 110px;
+  test-16: 110px;
+  test-17: 20px;
+  test-18: 20px;
+  test-19: 20px;
+  test-20: 20px;
+  test-21: 20px;
+  test-22: 20px;
+  test-23: 20px;
+  test-24: 20px;
+  test-25: 20px;
+  test-26: 10px +10px;
+  test-27: 20px;
+  test-28: 20px;
+  test-29: 10px+10px;
+  test-30: 10px +10px;
+  test-31: 10px+ 10px;
+  test-32: 10px + 10px;
+  test-33: 11px0px;
+  test-34: 11px0px;
+  test-35: 11px0px;
+  test-36: 11px0px;
+  test-37: 20pxpx;
+  test-38: 20pxpx;
+  test-39: 20pxpx;
+  test-40: 20pxpx;
+  test-41: 20pxpx;
+  test-42: 20pxpx;
+  test-43: 20pxpx;
+  test-44: 20pxpx;
+  test-45: 10px+10px;
+  test-46: 10px +10px;
+  test-47: 10px+ 10px;
+  test-48: 10px + 10px;
+  test-49: 10px10px;
+  test-50: 10px10px;
+  test-51: 10px10px;
+  test-52: 10px10px;
+  test-53: 10px10px;
+  test-54: 10px10px;
+  test-55: 10px10px;
+  test-56: 10px10px;
+  test-57: 10px10px;
+  test-58: 10px10px;
+  test-59: 10px10px;
+  test-60: 10px10px;
+  test-61: 10px10px;
+  test-62: 10px10px;
+  test-63: 10px10px;
+  test-64: 10px10px;
+  test-65: 10px10px;
+  test-66: 10px10px;
+  test-67: 10px10px;
+  test-68: 10px10px;
+  test-69: 10px10px;
+  test-70: 10px10px;
+  test-71: 10px10px;
+  test-72: 10px10px;
+  test-73: 10px+10px;
+  test-74: 10px +10px;
+  test-75: 10px+ 10px;
+  test-76: 10px + 10px;
+  test-77: 10px+10px;
+  test-78: 10px +10px;
+  test-79: 10px+ 10px;
+  test-80: 10px + 10px;
+  test-81: 10px10px;
+  test-82: 10px10px;
+  test-83: 10px10px;
+  test-84: 10px10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..bb6c02578b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10+10;
+  test-2: 10 +10;
+  test-3: 10+ 10;
+  test-4: 10 + 10;
+  test-5: 10+10px;
+  test-6: 10 +10px;
+  test-7: 10+ 10px;
+  test-8: 10 + 10px;
+  test-9: 10+#{10}px;
+  test-10: 10 +#{10}px;
+  test-11: 10+ #{10}px;
+  test-12: 10 + #{10}px;
+  test-13: 10+1#{0}px;
+  test-14: 10 +1#{0}px;
+  test-15: 10+ 1#{0}px;
+  test-16: 10 + 1#{0}px;
+  test-17: 10+10#{px};
+  test-18: 10 +10#{px};
+  test-19: 10+ 10#{px};
+  test-20: 10 + 10#{px};
+  test-21: 10+10#{p}x;
+  test-22: 10 +10#{p}x;
+  test-23: 10+ 10#{p}x;
+  test-24: 10 + 10#{p}x;
+  test-25: 10px+10px;
+  test-26: 10px +10px;
+  test-27: 10px+ 10px;
+  test-28: 10px + 10px;
+  test-29: 10px+#{10}px;
+  test-30: 10px +#{10}px;
+  test-31: 10px+ #{10}px;
+  test-32: 10px + #{10}px;
+  test-33: 10px+1#{0}px;
+  test-34: 10px +1#{0}px;
+  test-35: 10px+ 1#{0}px;
+  test-36: 10px + 1#{0}px;
+  test-37: 10px+10#{px};
+  test-38: 10px +10#{px};
+  test-39: 10px+ 10#{px};
+  test-40: 10px + 10#{px};
+  test-41: 10px+10#{p}x;
+  test-42: 10px +10#{p}x;
+  test-43: 10px+ 10#{p}x;
+  test-44: 10px + 10#{p}x;
+  test-45: #{10}px+#{10}px;
+  test-46: #{10}px +#{10}px;
+  test-47: #{10}px+ #{10}px;
+  test-48: #{10}px + #{10}px;
+  test-49: #{10}px+1#{0}px;
+  test-50: #{10}px +1#{0}px;
+  test-51: #{10}px+ 1#{0}px;
+  test-52: #{10}px + 1#{0}px;
+  test-53: #{10}px+10#{px};
+  test-54: #{10}px +10#{px};
+  test-55: #{10}px+ 10#{px};
+  test-56: #{10}px + 10#{px};
+  test-57: #{10}px+10#{p}x;
+  test-58: #{10}px +10#{p}x;
+  test-59: #{10}px+ 10#{p}x;
+  test-60: #{10}px + 10#{p}x;
+  test-61: 1#{0}px+1#{0}px;
+  test-62: 1#{0}px +1#{0}px;
+  test-63: 1#{0}px+ 1#{0}px;
+  test-64: 1#{0}px + 1#{0}px;
+  test-65: 1#{0}px+10#{px};
+  test-66: 1#{0}px +10#{px};
+  test-67: 1#{0}px+ 10#{px};
+  test-68: 1#{0}px + 10#{px};
+  test-69: 1#{0}px+10#{p}x;
+  test-70: 1#{0}px +10#{p}x;
+  test-71: 1#{0}px+ 10#{p}x;
+  test-72: 1#{0}px + 10#{p}x;
+  test-73: 10#{px}+10#{px};
+  test-74: 10#{px} +10#{px};
+  test-75: 10#{px}+ 10#{px};
+  test-76: 10#{px} + 10#{px};
+  test-77: 10#{px}+10#{p}x;
+  test-78: 10#{px} +10#{p}x;
+  test-79: 10#{px}+ 10#{p}x;
+  test-80: 10#{px} + 10#{p}x;
+  test-81: 10#{p}x+10#{p}x;
+  test-82: 10#{p}x +10#{p}x;
+  test-83: 10#{p}x+ 10#{p}x;
+  test-84: 10#{p}x + 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/addition/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..ccbebd271e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10+10+10;
+  test-2: 10 +10 +10;
+  test-3: 10+ 10+ 10;
+  test-4: 10 + 10 + 10;
+  test-5: 10+10+10px;
+  test-6: 10 +10 +10px;
+  test-7: 10+ 10+ 10px;
+  test-8: 10 + 10 + 10px;
+  test-9: 10+10+#{10}px;
+  test-10: 10 +10 +#{10}px;
+  test-11: 10+ 10+ #{10}px;
+  test-12: 10 + 10 + #{10}px;
+  test-13: 10+10+1#{0}px;
+  test-14: 10 +10 +1#{0}px;
+  test-15: 10+ 10+ 1#{0}px;
+  test-16: 10 + 10 + 1#{0}px;
+  test-17: 10+10+10#{px};
+  test-18: 10 +10 +10#{px};
+  test-19: 10+ 10+ 10#{px};
+  test-20: 10 + 10 + 10#{px};
+  test-21: 10+10+10#{p}x;
+  test-22: 10 +10 +10#{p}x;
+  test-23: 10+ 10+ 10#{p}x;
+  test-24: 10 + 10 + 10#{p}x;
+  test-25: 10+10px+10px;
+  test-26: 10 +10px +10px;
+  test-27: 10+ 10px+ 10px;
+  test-28: 10 + 10px + 10px;
+  test-29: 10+10px+#{10}px;
+  test-30: 10 +10px +#{10}px;
+  test-31: 10+ 10px+ #{10}px;
+  test-32: 10 + 10px + #{10}px;
+  test-33: 10+10px+1#{0}px;
+  test-34: 10 +10px +1#{0}px;
+  test-35: 10+ 10px+ 1#{0}px;
+  test-36: 10 + 10px + 1#{0}px;
+  test-37: 10+10px+10#{px};
+  test-38: 10 +10px +10#{px};
+  test-39: 10+ 10px+ 10#{px};
+  test-40: 10 + 10px + 10#{px};
+  test-41: 10+10px+10#{p}x;
+  test-42: 10 +10px +10#{p}x;
+  test-43: 10+ 10px+ 10#{p}x;
+  test-44: 10 + 10px + 10#{p}x;
+  test-45: 10+#{10}px+#{10}px;
+  test-46: 10 +#{10}px +#{10}px;
+  test-47: 10+ #{10}px+ #{10}px;
+  test-48: 10 + #{10}px + #{10}px;
+  test-49: 10+#{10}px+1#{0}px;
+  test-50: 10 +#{10}px +1#{0}px;
+  test-51: 10+ #{10}px+ 1#{0}px;
+  test-52: 10 + #{10}px + 1#{0}px;
+  test-53: 10+#{10}px+10#{px};
+  test-54: 10 +#{10}px +10#{px};
+  test-55: 10+ #{10}px+ 10#{px};
+  test-56: 10 + #{10}px + 10#{px};
+  test-57: 10+#{10}px+10#{p}x;
+  test-58: 10 +#{10}px +10#{p}x;
+  test-59: 10+ #{10}px+ 10#{p}x;
+  test-60: 10 + #{10}px + 10#{p}x;
+  test-61: 10+1#{0}px+1#{0}px;
+  test-62: 10 +1#{0}px +1#{0}px;
+  test-63: 10+ 1#{0}px+ 1#{0}px;
+  test-64: 10 + 1#{0}px + 1#{0}px;
+  test-65: 10+1#{0}px+10#{px};
+  test-66: 10 +1#{0}px +10#{px};
+  test-67: 10+ 1#{0}px+ 10#{px};
+  test-68: 10 + 1#{0}px + 10#{px};
+  test-69: 10+1#{0}px+10#{p}x;
+  test-70: 10 +1#{0}px +10#{p}x;
+  test-71: 10+ 1#{0}px+ 10#{p}x;
+  test-72: 10 + 1#{0}px + 10#{p}x;
+  test-73: 10+10#{px}+10#{px};
+  test-74: 10 +10#{px} +10#{px};
+  test-75: 10+ 10#{px}+ 10#{px};
+  test-76: 10 + 10#{px} + 10#{px};
+  test-77: 10+10#{px}+10#{p}x;
+  test-78: 10 +10#{px} +10#{p}x;
+  test-79: 10+ 10#{px}+ 10#{p}x;
+  test-80: 10 + 10#{px} + 10#{p}x;
+  test-81: 10+10#{p}x+10#{p}x;
+  test-82: 10 +10#{p}x +10#{p}x;
+  test-83: 10+ 10#{p}x+ 10#{p}x;
+  test-84: 10 + 10#{p}x + 10#{p}x;
+  test-85: 10px+10px+10px;
+  test-86: 10px +10px +10px;
+  test-87: 10px+ 10px+ 10px;
+  test-88: 10px + 10px + 10px;
+  test-89: 10px+10px+#{10}px;
+  test-90: 10px +10px +#{10}px;
+  test-91: 10px+ 10px+ #{10}px;
+  test-92: 10px + 10px + #{10}px;
+  test-93: 10px+10px+1#{0}px;
+  test-94: 10px +10px +1#{0}px;
+  test-95: 10px+ 10px+ 1#{0}px;
+  test-96: 10px + 10px + 1#{0}px;
+  test-97: 10px+10px+10#{px};
+  test-98: 10px +10px +10#{px};
+  test-99: 10px+ 10px+ 10#{px};
+  test-100: 10px + 10px + 10#{px};
+  test-101: 10px+10px+10#{p}x;
+  test-102: 10px +10px +10#{p}x;
+  test-103: 10px+ 10px+ 10#{p}x;
+  test-104: 10px + 10px + 10#{p}x;
+  test-105: 10px+#{10}px+#{10}px;
+  test-106: 10px +#{10}px +#{10}px;
+  test-107: 10px+ #{10}px+ #{10}px;
+  test-108: 10px + #{10}px + #{10}px;
+  test-109: 10px+#{10}px+1#{0}px;
+  test-110: 10px +#{10}px +1#{0}px;
+  test-111: 10px+ #{10}px+ 1#{0}px;
+  test-112: 10px + #{10}px + 1#{0}px;
+  test-113: 10px+#{10}px+10#{px};
+  test-114: 10px +#{10}px +10#{px};
+  test-115: 10px+ #{10}px+ 10#{px};
+  test-116: 10px + #{10}px + 10#{px};
+  test-117: 10px+#{10}px+10#{p}x;
+  test-118: 10px +#{10}px +10#{p}x;
+  test-119: 10px+ #{10}px+ 10#{p}x;
+  test-120: 10px + #{10}px + 10#{p}x;
+  test-121: 10px+1#{0}px+1#{0}px;
+  test-122: 10px +1#{0}px +1#{0}px;
+  test-123: 10px+ 1#{0}px+ 1#{0}px;
+  test-124: 10px + 1#{0}px + 1#{0}px;
+  test-125: 10px+1#{0}px+10#{px};
+  test-126: 10px +1#{0}px +10#{px};
+  test-127: 10px+ 1#{0}px+ 10#{px};
+  test-128: 10px + 1#{0}px + 10#{px};
+  test-129: 10px+1#{0}px+10#{p}x;
+  test-130: 10px +1#{0}px +10#{p}x;
+  test-131: 10px+ 1#{0}px+ 10#{p}x;
+  test-132: 10px + 1#{0}px + 10#{p}x;
+  test-133: 10px+10#{px}+10#{px};
+  test-134: 10px +10#{px} +10#{px};
+  test-135: 10px+ 10#{px}+ 10#{px};
+  test-136: 10px + 10#{px} + 10#{px};
+  test-137: 10px+10#{px}+10#{p}x;
+  test-138: 10px +10#{px} +10#{p}x;
+  test-139: 10px+ 10#{px}+ 10#{p}x;
+  test-140: 10px + 10#{px} + 10#{p}x;
+  test-141: 10px+10#{p}x+10#{p}x;
+  test-142: 10px +10#{p}x +10#{p}x;
+  test-143: 10px+ 10#{p}x+ 10#{p}x;
+  test-144: 10px + 10#{p}x + 10#{p}x;
+  test-145: #{10}px+#{10}px+#{10}px;
+  test-146: #{10}px +#{10}px +#{10}px;
+  test-147: #{10}px+ #{10}px+ #{10}px;
+  test-148: #{10}px + #{10}px + #{10}px;
+  test-149: #{10}px+#{10}px+1#{0}px;
+  test-150: #{10}px +#{10}px +1#{0}px;
+  test-151: #{10}px+ #{10}px+ 1#{0}px;
+  test-152: #{10}px + #{10}px + 1#{0}px;
+  test-153: #{10}px+#{10}px+10#{px};
+  test-154: #{10}px +#{10}px +10#{px};
+  test-155: #{10}px+ #{10}px+ 10#{px};
+  test-156: #{10}px + #{10}px + 10#{px};
+  test-157: #{10}px+#{10}px+10#{p}x;
+  test-158: #{10}px +#{10}px +10#{p}x;
+  test-159: #{10}px+ #{10}px+ 10#{p}x;
+  test-160: #{10}px + #{10}px + 10#{p}x;
+  test-161: #{10}px+1#{0}px+1#{0}px;
+  test-162: #{10}px +1#{0}px +1#{0}px;
+  test-163: #{10}px+ 1#{0}px+ 1#{0}px;
+  test-164: #{10}px + 1#{0}px + 1#{0}px;
+  test-165: #{10}px+1#{0}px+10#{px};
+  test-166: #{10}px +1#{0}px +10#{px};
+  test-167: #{10}px+ 1#{0}px+ 10#{px};
+  test-168: #{10}px + 1#{0}px + 10#{px};
+  test-169: #{10}px+1#{0}px+10#{p}x;
+  test-170: #{10}px +1#{0}px +10#{p}x;
+  test-171: #{10}px+ 1#{0}px+ 10#{p}x;
+  test-172: #{10}px + 1#{0}px + 10#{p}x;
+  test-173: #{10}px+10#{px}+10#{px};
+  test-174: #{10}px +10#{px} +10#{px};
+  test-175: #{10}px+ 10#{px}+ 10#{px};
+  test-176: #{10}px + 10#{px} + 10#{px};
+  test-177: #{10}px+10#{px}+10#{p}x;
+  test-178: #{10}px +10#{px} +10#{p}x;
+  test-179: #{10}px+ 10#{px}+ 10#{p}x;
+  test-180: #{10}px + 10#{px} + 10#{p}x;
+  test-181: #{10}px+10#{p}x+10#{p}x;
+  test-182: #{10}px +10#{p}x +10#{p}x;
+  test-183: #{10}px+ 10#{p}x+ 10#{p}x;
+  test-184: #{10}px + 10#{p}x + 10#{p}x;
+  test-185: 1#{0}px+1#{0}px+1#{0}px;
+  test-186: 1#{0}px +1#{0}px +1#{0}px;
+  test-187: 1#{0}px+ 1#{0}px+ 1#{0}px;
+  test-188: 1#{0}px + 1#{0}px + 1#{0}px;
+  test-189: 1#{0}px+1#{0}px+10#{px};
+  test-190: 1#{0}px +1#{0}px +10#{px};
+  test-191: 1#{0}px+ 1#{0}px+ 10#{px};
+  test-192: 1#{0}px + 1#{0}px + 10#{px};
+  test-193: 1#{0}px+1#{0}px+10#{p}x;
+  test-194: 1#{0}px +1#{0}px +10#{p}x;
+  test-195: 1#{0}px+ 1#{0}px+ 10#{p}x;
+  test-196: 1#{0}px + 1#{0}px + 10#{p}x;
+  test-197: 1#{0}px+10#{px}+10#{px};
+  test-198: 1#{0}px +10#{px} +10#{px};
+  test-199: 1#{0}px+ 10#{px}+ 10#{px};
+  test-200: 1#{0}px + 10#{px} + 10#{px};
+  test-201: 1#{0}px+10#{px}+10#{p}x;
+  test-202: 1#{0}px +10#{px} +10#{p}x;
+  test-203: 1#{0}px+ 10#{px}+ 10#{p}x;
+  test-204: 1#{0}px + 10#{px} + 10#{p}x;
+  test-205: 1#{0}px+10#{p}x+10#{p}x;
+  test-206: 1#{0}px +10#{p}x +10#{p}x;
+  test-207: 1#{0}px+ 10#{p}x+ 10#{p}x;
+  test-208: 1#{0}px + 10#{p}x + 10#{p}x;
+  test-209: 10#{px}+10#{px}+10#{px};
+  test-210: 10#{px} +10#{px} +10#{px};
+  test-211: 10#{px}+ 10#{px}+ 10#{px};
+  test-212: 10#{px} + 10#{px} + 10#{px};
+  test-213: 10#{px}+10#{px}+10#{p}x;
+  test-214: 10#{px} +10#{px} +10#{p}x;
+  test-215: 10#{px}+ 10#{px}+ 10#{p}x;
+  test-216: 10#{px} + 10#{px} + 10#{p}x;
+  test-217: 10#{px}+10#{p}x+10#{p}x;
+  test-218: 10#{px} +10#{p}x +10#{p}x;
+  test-219: 10#{px}+ 10#{p}x+ 10#{p}x;
+  test-220: 10#{px} + 10#{p}x + 10#{p}x;
+  test-221: 10#{p}x+10#{p}x+10#{p}x;
+  test-222: 10#{p}x +10#{p}x +10#{p}x;
+  test-223: 10#{p}x+ 10#{p}x+ 10#{p}x;
+  test-224: 10#{p}x + 10#{p}x + 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/error
new file mode 100644
index 0000000000..44d1cee518
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25+#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/addition/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/input.scss
new file mode 100644
index 0000000000..f85e1f4881
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25+.25;
+  test-2: .25 +.25;
+  test-3: .25+ .25;
+  test-4: .25 + .25;
+  test-5: .25+-.25;
+  test-6: .25 +-.25;
+  test-7: .25+ -.25;
+  test-8: .25 + -.25;
+  test-9: .25+#{.25};
+  test-10: .25 +#{.25};
+  test-11: .25+ #{.25};
+  test-12: .25 + #{.25};
+  test-13: .25+#{-.25};
+  test-14: .25 +#{-.25};
+  test-15: .25+ #{-.25};
+  test-16: .25 + #{-.25};
+  test-17: .25+#{.}25;
+  test-18: .25 +#{.}25;
+  test-19: .25+ #{.}25;
+  test-20: .25 + #{.}25;
+  test-21: -.25+-.25;
+  test-22: -.25 +-.25;
+  test-23: -.25+ -.25;
+  test-24: -.25 + -.25;
+  test-25: -.25+#{.25};
+  test-26: -.25 +#{.25};
+  test-27: -.25+ #{.25};
+  test-28: -.25 + #{.25};
+  test-29: -.25+#{-.25};
+  test-30: -.25 +#{-.25};
+  test-31: -.25+ #{-.25};
+  test-32: -.25 + #{-.25};
+  test-33: -.25+#{.}25;
+  test-34: -.25 +#{.}25;
+  test-35: -.25+ #{.}25;
+  test-36: -.25 + #{.}25;
+  test-37: #{.25}+#{.25};
+  test-38: #{.25} +#{.25};
+  test-39: #{.25}+ #{.25};
+  test-40: #{.25} + #{.25};
+  test-41: #{.25}+#{-.25};
+  test-42: #{.25} +#{-.25};
+  test-43: #{.25}+ #{-.25};
+  test-44: #{.25} + #{-.25};
+  test-45: #{.25}+#{.}25;
+  test-46: #{.25} +#{.}25;
+  test-47: #{.25}+ #{.}25;
+  test-48: #{.25} + #{.}25;
+  test-49: #{-.25}+#{-.25};
+  test-50: #{-.25} +#{-.25};
+  test-51: #{-.25}+ #{-.25};
+  test-52: #{-.25} + #{-.25};
+  test-53: #{-.25}+#{.}25;
+  test-54: #{-.25} +#{.}25;
+  test-55: #{-.25}+ #{.}25;
+  test-56: #{-.25} + #{.}25;
+  test-57: #{.}25+#{.}25;
+  test-58: #{.}25 +#{.}25;
+  test-59: #{.}25+ #{.}25;
+  test-60: #{.}25 + #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/addition/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/addition/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..1f51efb5fe
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25+.25+.25;
+  test-2: .25 +.25 +.25;
+  test-3: .25+ .25+ .25;
+  test-4: .25 + .25 + .25;
+  test-5: .25+.25+-.25;
+  test-6: .25 +.25 +-.25;
+  test-7: .25+ .25+ -.25;
+  test-8: .25 + .25 + -.25;
+  test-9: .25+.25+#{.25};
+  test-10: .25 +.25 +#{.25};
+  test-11: .25+ .25+ #{.25};
+  test-12: .25 + .25 + #{.25};
+  test-13: .25+.25+#{-.25};
+  test-14: .25 +.25 +#{-.25};
+  test-15: .25+ .25+ #{-.25};
+  test-16: .25 + .25 + #{-.25};
+  test-17: .25+.25+#{.}25;
+  test-18: .25 +.25 +#{.}25;
+  test-19: .25+ .25+ #{.}25;
+  test-20: .25 + .25 + #{.}25;
+  test-21: .25+-.25+-.25;
+  test-22: .25 +-.25 +-.25;
+  test-23: .25+ -.25+ -.25;
+  test-24: .25 + -.25 + -.25;
+  test-25: .25+-.25+#{.25};
+  test-26: .25 +-.25 +#{.25};
+  test-27: .25+ -.25+ #{.25};
+  test-28: .25 + -.25 + #{.25};
+  test-29: .25+-.25+#{-.25};
+  test-30: .25 +-.25 +#{-.25};
+  test-31: .25+ -.25+ #{-.25};
+  test-32: .25 + -.25 + #{-.25};
+  test-33: .25+-.25+#{.}25;
+  test-34: .25 +-.25 +#{.}25;
+  test-35: .25+ -.25+ #{.}25;
+  test-36: .25 + -.25 + #{.}25;
+  test-37: .25+#{.25}+#{.25};
+  test-38: .25 +#{.25} +#{.25};
+  test-39: .25+ #{.25}+ #{.25};
+  test-40: .25 + #{.25} + #{.25};
+  test-41: .25+#{.25}+#{-.25};
+  test-42: .25 +#{.25} +#{-.25};
+  test-43: .25+ #{.25}+ #{-.25};
+  test-44: .25 + #{.25} + #{-.25};
+  test-45: .25+#{.25}+#{.}25;
+  test-46: .25 +#{.25} +#{.}25;
+  test-47: .25+ #{.25}+ #{.}25;
+  test-48: .25 + #{.25} + #{.}25;
+  test-49: .25+#{-.25}+#{-.25};
+  test-50: .25 +#{-.25} +#{-.25};
+  test-51: .25+ #{-.25}+ #{-.25};
+  test-52: .25 + #{-.25} + #{-.25};
+  test-53: .25+#{-.25}+#{.}25;
+  test-54: .25 +#{-.25} +#{.}25;
+  test-55: .25+ #{-.25}+ #{.}25;
+  test-56: .25 + #{-.25} + #{.}25;
+  test-57: .25+#{.}25+#{.}25;
+  test-58: .25 +#{.}25 +#{.}25;
+  test-59: .25+ #{.}25+ #{.}25;
+  test-60: .25 + #{.}25 + #{.}25;
+  test-61: -.25+-.25+-.25;
+  test-62: -.25 +-.25 +-.25;
+  test-63: -.25+ -.25+ -.25;
+  test-64: -.25 + -.25 + -.25;
+  test-65: -.25+-.25+#{.25};
+  test-66: -.25 +-.25 +#{.25};
+  test-67: -.25+ -.25+ #{.25};
+  test-68: -.25 + -.25 + #{.25};
+  test-69: -.25+-.25+#{-.25};
+  test-70: -.25 +-.25 +#{-.25};
+  test-71: -.25+ -.25+ #{-.25};
+  test-72: -.25 + -.25 + #{-.25};
+  test-73: -.25+-.25+#{.}25;
+  test-74: -.25 +-.25 +#{.}25;
+  test-75: -.25+ -.25+ #{.}25;
+  test-76: -.25 + -.25 + #{.}25;
+  test-77: -.25+#{.25}+#{.25};
+  test-78: -.25 +#{.25} +#{.25};
+  test-79: -.25+ #{.25}+ #{.25};
+  test-80: -.25 + #{.25} + #{.25};
+  test-81: -.25+#{.25}+#{-.25};
+  test-82: -.25 +#{.25} +#{-.25};
+  test-83: -.25+ #{.25}+ #{-.25};
+  test-84: -.25 + #{.25} + #{-.25};
+  test-85: -.25+#{.25}+#{.}25;
+  test-86: -.25 +#{.25} +#{.}25;
+  test-87: -.25+ #{.25}+ #{.}25;
+  test-88: -.25 + #{.25} + #{.}25;
+  test-89: -.25+#{-.25}+#{-.25};
+  test-90: -.25 +#{-.25} +#{-.25};
+  test-91: -.25+ #{-.25}+ #{-.25};
+  test-92: -.25 + #{-.25} + #{-.25};
+  test-93: -.25+#{-.25}+#{.}25;
+  test-94: -.25 +#{-.25} +#{.}25;
+  test-95: -.25+ #{-.25}+ #{.}25;
+  test-96: -.25 + #{-.25} + #{.}25;
+  test-97: -.25+#{.}25+#{.}25;
+  test-98: -.25 +#{.}25 +#{.}25;
+  test-99: -.25+ #{.}25+ #{.}25;
+  test-100: -.25 + #{.}25 + #{.}25;
+  test-101: #{.25}+#{.25}+#{.25};
+  test-102: #{.25} +#{.25} +#{.25};
+  test-103: #{.25}+ #{.25}+ #{.25};
+  test-104: #{.25} + #{.25} + #{.25};
+  test-105: #{.25}+#{.25}+#{-.25};
+  test-106: #{.25} +#{.25} +#{-.25};
+  test-107: #{.25}+ #{.25}+ #{-.25};
+  test-108: #{.25} + #{.25} + #{-.25};
+  test-109: #{.25}+#{.25}+#{.}25;
+  test-110: #{.25} +#{.25} +#{.}25;
+  test-111: #{.25}+ #{.25}+ #{.}25;
+  test-112: #{.25} + #{.25} + #{.}25;
+  test-113: #{.25}+#{-.25}+#{-.25};
+  test-114: #{.25} +#{-.25} +#{-.25};
+  test-115: #{.25}+ #{-.25}+ #{-.25};
+  test-116: #{.25} + #{-.25} + #{-.25};
+  test-117: #{.25}+#{-.25}+#{.}25;
+  test-118: #{.25} +#{-.25} +#{.}25;
+  test-119: #{.25}+ #{-.25}+ #{.}25;
+  test-120: #{.25} + #{-.25} + #{.}25;
+  test-121: #{.25}+#{.}25+#{.}25;
+  test-122: #{.25} +#{.}25 +#{.}25;
+  test-123: #{.25}+ #{.}25+ #{.}25;
+  test-124: #{.25} + #{.}25 + #{.}25;
+  test-125: #{-.25}+#{-.25}+#{-.25};
+  test-126: #{-.25} +#{-.25} +#{-.25};
+  test-127: #{-.25}+ #{-.25}+ #{-.25};
+  test-128: #{-.25} + #{-.25} + #{-.25};
+  test-129: #{-.25}+#{-.25}+#{.}25;
+  test-130: #{-.25} +#{-.25} +#{.}25;
+  test-131: #{-.25}+ #{-.25}+ #{.}25;
+  test-132: #{-.25} + #{-.25} + #{.}25;
+  test-133: #{-.25}+#{.}25+#{.}25;
+  test-134: #{-.25} +#{.}25 +#{.}25;
+  test-135: #{-.25}+ #{.}25+ #{.}25;
+  test-136: #{-.25} + #{.}25 + #{.}25;
+  test-137: #{.}25+#{.}25+#{.}25;
+  test-138: #{.}25 +#{.}25 +#{.}25;
+  test-139: #{.}25+ #{.}25+ #{.}25;
+  test-140: #{.}25 + #{.}25 + #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/error
new file mode 100644
index 0000000000..def41f2b2d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Incompatible units: 'px' and '%'.
+        on line 26 of /sass/sass-spec/spec/parser/operations/addition/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/input.scss
new file mode 100644
index 0000000000..9f1c72d1b5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10+10;
+  test-2: 10 +10;
+  test-3: 10+ 10;
+  test-4: 10 + 10;
+  test-5: 10+10%;
+  test-6: 10 +10%;
+  test-7: 10+ 10%;
+  test-8: 10 + 10%;
+  test-9: 10+10px;
+  test-10: 10 +10px;
+  test-11: 10+ 10px;
+  test-12: 10 + 10px;
+  test-13: 10+#AAA;
+  test-14: 10 +#AAA;
+  test-15: 10+ #AAA;
+  test-16: 10 + #AAA;
+  test-17: 10+#{itpl};
+  test-18: 10 +#{itpl};
+  test-19: 10+ #{itpl};
+  test-20: 10 + #{itpl};
+  test-21: 10%+10%;
+  test-22: 10% +10%;
+  test-23: 10%+ 10%;
+  test-24: 10% + 10%;
+  test-25: 10%+10px;
+  test-26: 10% +10px;
+  test-27: 10%+ 10px;
+  test-28: 10% + 10px;
+  test-29: 10%+#AAA;
+  test-30: 10% +#AAA;
+  test-31: 10%+ #AAA;
+  test-32: 10% + #AAA;
+  test-33: 10%+#{itpl};
+  test-34: 10% +#{itpl};
+  test-35: 10%+ #{itpl};
+  test-36: 10% + #{itpl};
+  test-37: 10px+10px;
+  test-38: 10px +10px;
+  test-39: 10px+ 10px;
+  test-40: 10px + 10px;
+  test-41: 10px+#AAA;
+  test-42: 10px +#AAA;
+  test-43: 10px+ #AAA;
+  test-44: 10px + #AAA;
+  test-45: 10px+#{itpl};
+  test-46: 10px +#{itpl};
+  test-47: 10px+ #{itpl};
+  test-48: 10px + #{itpl};
+  test-49: #AAA+#AAA;
+  test-50: #AAA +#AAA;
+  test-51: #AAA+ #AAA;
+  test-52: #AAA + #AAA;
+  test-53: #AAA+#{itpl};
+  test-54: #AAA +#{itpl};
+  test-55: #AAA+ #{itpl};
+  test-56: #AAA + #{itpl};
+  test-57: #{itpl}+#{itpl};
+  test-58: #{itpl} +#{itpl};
+  test-59: #{itpl}+ #{itpl};
+  test-60: #{itpl} + #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/addition/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/addition/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..abe0037cee
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10+10+10;
+  test-2: 10 +10 +10;
+  test-3: 10+ 10+ 10;
+  test-4: 10 + 10 + 10;
+  test-5: 10+10+10%;
+  test-6: 10 +10 +10%;
+  test-7: 10+ 10+ 10%;
+  test-8: 10 + 10 + 10%;
+  test-9: 10+10+10px;
+  test-10: 10 +10 +10px;
+  test-11: 10+ 10+ 10px;
+  test-12: 10 + 10 + 10px;
+  test-13: 10+10+#AAA;
+  test-14: 10 +10 +#AAA;
+  test-15: 10+ 10+ #AAA;
+  test-16: 10 + 10 + #AAA;
+  test-17: 10+10+#{itpl};
+  test-18: 10 +10 +#{itpl};
+  test-19: 10+ 10+ #{itpl};
+  test-20: 10 + 10 + #{itpl};
+  test-21: 10+10%+10%;
+  test-22: 10 +10% +10%;
+  test-23: 10+ 10%+ 10%;
+  test-24: 10 + 10% + 10%;
+  test-25: 10+10%+10px;
+  test-26: 10 +10% +10px;
+  test-27: 10+ 10%+ 10px;
+  test-28: 10 + 10% + 10px;
+  test-29: 10+10%+#AAA;
+  test-30: 10 +10% +#AAA;
+  test-31: 10+ 10%+ #AAA;
+  test-32: 10 + 10% + #AAA;
+  test-33: 10+10%+#{itpl};
+  test-34: 10 +10% +#{itpl};
+  test-35: 10+ 10%+ #{itpl};
+  test-36: 10 + 10% + #{itpl};
+  test-37: 10+10px+10px;
+  test-38: 10 +10px +10px;
+  test-39: 10+ 10px+ 10px;
+  test-40: 10 + 10px + 10px;
+  test-41: 10+10px+#AAA;
+  test-42: 10 +10px +#AAA;
+  test-43: 10+ 10px+ #AAA;
+  test-44: 10 + 10px + #AAA;
+  test-45: 10+10px+#{itpl};
+  test-46: 10 +10px +#{itpl};
+  test-47: 10+ 10px+ #{itpl};
+  test-48: 10 + 10px + #{itpl};
+  test-49: 10+#AAA+#AAA;
+  test-50: 10 +#AAA +#AAA;
+  test-51: 10+ #AAA+ #AAA;
+  test-52: 10 + #AAA + #AAA;
+  test-53: 10+#AAA+#{itpl};
+  test-54: 10 +#AAA +#{itpl};
+  test-55: 10+ #AAA+ #{itpl};
+  test-56: 10 + #AAA + #{itpl};
+  test-57: 10+#{itpl}+#{itpl};
+  test-58: 10 +#{itpl} +#{itpl};
+  test-59: 10+ #{itpl}+ #{itpl};
+  test-60: 10 + #{itpl} + #{itpl};
+  test-61: 10%+10%+10%;
+  test-62: 10% +10% +10%;
+  test-63: 10%+ 10%+ 10%;
+  test-64: 10% + 10% + 10%;
+  test-65: 10%+10%+10px;
+  test-66: 10% +10% +10px;
+  test-67: 10%+ 10%+ 10px;
+  test-68: 10% + 10% + 10px;
+  test-69: 10%+10%+#AAA;
+  test-70: 10% +10% +#AAA;
+  test-71: 10%+ 10%+ #AAA;
+  test-72: 10% + 10% + #AAA;
+  test-73: 10%+10%+#{itpl};
+  test-74: 10% +10% +#{itpl};
+  test-75: 10%+ 10%+ #{itpl};
+  test-76: 10% + 10% + #{itpl};
+  test-77: 10%+10px+10px;
+  test-78: 10% +10px +10px;
+  test-79: 10%+ 10px+ 10px;
+  test-80: 10% + 10px + 10px;
+  test-81: 10%+10px+#AAA;
+  test-82: 10% +10px +#AAA;
+  test-83: 10%+ 10px+ #AAA;
+  test-84: 10% + 10px + #AAA;
+  test-85: 10%+10px+#{itpl};
+  test-86: 10% +10px +#{itpl};
+  test-87: 10%+ 10px+ #{itpl};
+  test-88: 10% + 10px + #{itpl};
+  test-89: 10%+#AAA+#AAA;
+  test-90: 10% +#AAA +#AAA;
+  test-91: 10%+ #AAA+ #AAA;
+  test-92: 10% + #AAA + #AAA;
+  test-93: 10%+#AAA+#{itpl};
+  test-94: 10% +#AAA +#{itpl};
+  test-95: 10%+ #AAA+ #{itpl};
+  test-96: 10% + #AAA + #{itpl};
+  test-97: 10%+#{itpl}+#{itpl};
+  test-98: 10% +#{itpl} +#{itpl};
+  test-99: 10%+ #{itpl}+ #{itpl};
+  test-100: 10% + #{itpl} + #{itpl};
+  test-101: 10px+10px+10px;
+  test-102: 10px +10px +10px;
+  test-103: 10px+ 10px+ 10px;
+  test-104: 10px + 10px + 10px;
+  test-105: 10px+10px+#AAA;
+  test-106: 10px +10px +#AAA;
+  test-107: 10px+ 10px+ #AAA;
+  test-108: 10px + 10px + #AAA;
+  test-109: 10px+10px+#{itpl};
+  test-110: 10px +10px +#{itpl};
+  test-111: 10px+ 10px+ #{itpl};
+  test-112: 10px + 10px + #{itpl};
+  test-113: 10px+#AAA+#AAA;
+  test-114: 10px +#AAA +#AAA;
+  test-115: 10px+ #AAA+ #AAA;
+  test-116: 10px + #AAA + #AAA;
+  test-117: 10px+#AAA+#{itpl};
+  test-118: 10px +#AAA +#{itpl};
+  test-119: 10px+ #AAA+ #{itpl};
+  test-120: 10px + #AAA + #{itpl};
+  test-121: 10px+#{itpl}+#{itpl};
+  test-122: 10px +#{itpl} +#{itpl};
+  test-123: 10px+ #{itpl}+ #{itpl};
+  test-124: 10px + #{itpl} + #{itpl};
+  test-125: #AAA+#AAA+#AAA;
+  test-126: #AAA +#AAA +#AAA;
+  test-127: #AAA+ #AAA+ #AAA;
+  test-128: #AAA + #AAA + #AAA;
+  test-129: #AAA+#AAA+#{itpl};
+  test-130: #AAA +#AAA +#{itpl};
+  test-131: #AAA+ #AAA+ #{itpl};
+  test-132: #AAA + #AAA + #{itpl};
+  test-133: #AAA+#{itpl}+#{itpl};
+  test-134: #AAA +#{itpl} +#{itpl};
+  test-135: #AAA+ #{itpl}+ #{itpl};
+  test-136: #AAA + #{itpl} + #{itpl};
+  test-137: #{itpl}+#{itpl}+#{itpl};
+  test-138: #{itpl} +#{itpl} +#{itpl};
+  test-139: #{itpl}+ #{itpl}+ #{itpl};
+  test-140: #{itpl} + #{itpl} + #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..317c71d85d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 20; test-2: 10 +10; test-3: 20; test-4: 20; test-5: 10+10; test-6: 10 +10; test-7: 10+ 10; test-8: 10 + 10; test-9: 110; test-10: 110; test-11: 110; test-12: 110; test-13: 10+10; test-14: 10 +10; test-15: 10+ 10; test-16: 10 + 10; test-17: 10+10; test-18: 10 +10; test-19: 10+ 10; test-20: 10 + 10; test-21: 10+10; test-22: 10 +10; test-23: 10+ 10; test-24: 10 + 10; test-25: 10+10; test-26: 10 +10; test-27: 10+ 10; test-28: 10 + 10; test-29: 10+10; test-30: 10 +10; test-31: 10+ 10; test-32: 10 + 10; test-33: 10+10; test-34: 10 +10; test-35: 10+ 10; test-36: 10 + 10; test-37: 10+10; test-38: 10 +10; test-39: 10+ 10; test-40: 10 + 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..db021cc347
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:20;test-2:10 +10;test-3:20;test-4:20;test-5:10+10;test-6:10 +10;test-7:10+ 10;test-8:10 + 10;test-9:110;test-10:110;test-11:110;test-12:110;test-13:10+10;test-14:10 +10;test-15:10+ 10;test-16:10 + 10;test-17:10+10;test-18:10 +10;test-19:10+ 10;test-20:10 + 10;test-21:10+10;test-22:10 +10;test-23:10+ 10;test-24:10 + 10;test-25:10+10;test-26:10 +10;test-27:10+ 10;test-28:10 + 10;test-29:10+10;test-30:10 +10;test-31:10+ 10;test-32:10 + 10;test-33:10+10;test-34:10 +10;test-35:10+ 10;test-36:10 + 10;test-37:10+10;test-38:10 +10;test-39:10+ 10;test-40:10 + 10}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..c261eeab63
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: 20;
+  test-2: 10 +10;
+  test-3: 20;
+  test-4: 20;
+  test-5: 10+10;
+  test-6: 10 +10;
+  test-7: 10+ 10;
+  test-8: 10 + 10;
+  test-9: 110;
+  test-10: 110;
+  test-11: 110;
+  test-12: 110;
+  test-13: 10+10;
+  test-14: 10 +10;
+  test-15: 10+ 10;
+  test-16: 10 + 10;
+  test-17: 10+10;
+  test-18: 10 +10;
+  test-19: 10+ 10;
+  test-20: 10 + 10;
+  test-21: 10+10;
+  test-22: 10 +10;
+  test-23: 10+ 10;
+  test-24: 10 + 10;
+  test-25: 10+10;
+  test-26: 10 +10;
+  test-27: 10+ 10;
+  test-28: 10 + 10;
+  test-29: 10+10;
+  test-30: 10 +10;
+  test-31: 10+ 10;
+  test-32: 10 + 10;
+  test-33: 10+10;
+  test-34: 10 +10;
+  test-35: 10+ 10;
+  test-36: 10 + 10;
+  test-37: 10+10;
+  test-38: 10 +10;
+  test-39: 10+ 10;
+  test-40: 10 + 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..41da085353
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: 20;
+  test-2: 10 +10;
+  test-3: 20;
+  test-4: 20;
+  test-5: 10+10;
+  test-6: 10 +10;
+  test-7: 10+ 10;
+  test-8: 10 + 10;
+  test-9: 110;
+  test-10: 110;
+  test-11: 110;
+  test-12: 110;
+  test-13: 10+10;
+  test-14: 10 +10;
+  test-15: 10+ 10;
+  test-16: 10 + 10;
+  test-17: 10+10;
+  test-18: 10 +10;
+  test-19: 10+ 10;
+  test-20: 10 + 10;
+  test-21: 10+10;
+  test-22: 10 +10;
+  test-23: 10+ 10;
+  test-24: 10 + 10;
+  test-25: 10+10;
+  test-26: 10 +10;
+  test-27: 10+ 10;
+  test-28: 10 + 10;
+  test-29: 10+10;
+  test-30: 10 +10;
+  test-31: 10+ 10;
+  test-32: 10 + 10;
+  test-33: 10+10;
+  test-34: 10 +10;
+  test-35: 10+ 10;
+  test-36: 10 + 10;
+  test-37: 10+10;
+  test-38: 10 +10;
+  test-39: 10+ 10;
+  test-40: 10 + 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/input.scss
new file mode 100644
index 0000000000..403f046d15
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10+10;
+  test-2: 10 +10;
+  test-3: 10+ 10;
+  test-4: 10 + 10;
+  test-5: 10+#{10};
+  test-6: 10 +#{10};
+  test-7: 10+ #{10};
+  test-8: 10 + #{10};
+  test-9: 10+1#{0};
+  test-10: 10 +1#{0};
+  test-11: 10+ 1#{0};
+  test-12: 10 + 1#{0};
+  test-13: 10+#{1}0;
+  test-14: 10 +#{1}0;
+  test-15: 10+ #{1}0;
+  test-16: 10 + #{1}0;
+  test-17: #{10}+#{10};
+  test-18: #{10} +#{10};
+  test-19: #{10}+ #{10};
+  test-20: #{10} + #{10};
+  test-21: #{10}+1#{0};
+  test-22: #{10} +1#{0};
+  test-23: #{10}+ 1#{0};
+  test-24: #{10} + 1#{0};
+  test-25: #{10}+#{1}0;
+  test-26: #{10} +#{1}0;
+  test-27: #{10}+ #{1}0;
+  test-28: #{10} + #{1}0;
+  test-29: 1#{0}+1#{0};
+  test-30: 1#{0} +1#{0};
+  test-31: 1#{0}+ 1#{0};
+  test-32: 1#{0} + 1#{0};
+  test-33: 1#{0}+#{1}0;
+  test-34: 1#{0} +#{1}0;
+  test-35: 1#{0}+ #{1}0;
+  test-36: 1#{0} + #{1}0;
+  test-37: #{1}0+#{1}0;
+  test-38: #{1}0 +#{1}0;
+  test-39: #{1}0+ #{1}0;
+  test-40: #{1}0 + #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/addition/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..54dff53b30
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10+10+10;
+  test-2: 10 +10 +10;
+  test-3: 10+ 10+ 10;
+  test-4: 10 + 10 + 10;
+  test-5: 10+10+#{10};
+  test-6: 10 +10 +#{10};
+  test-7: 10+ 10+ #{10};
+  test-8: 10 + 10 + #{10};
+  test-9: 10+10+1#{0};
+  test-10: 10 +10 +1#{0};
+  test-11: 10+ 10+ 1#{0};
+  test-12: 10 + 10 + 1#{0};
+  test-13: 10+10+#{1}0;
+  test-14: 10 +10 +#{1}0;
+  test-15: 10+ 10+ #{1}0;
+  test-16: 10 + 10 + #{1}0;
+  test-17: 10+#{10}+#{10};
+  test-18: 10 +#{10} +#{10};
+  test-19: 10+ #{10}+ #{10};
+  test-20: 10 + #{10} + #{10};
+  test-21: 10+#{10}+1#{0};
+  test-22: 10 +#{10} +1#{0};
+  test-23: 10+ #{10}+ 1#{0};
+  test-24: 10 + #{10} + 1#{0};
+  test-25: 10+#{10}+#{1}0;
+  test-26: 10 +#{10} +#{1}0;
+  test-27: 10+ #{10}+ #{1}0;
+  test-28: 10 + #{10} + #{1}0;
+  test-29: 10+1#{0}+1#{0};
+  test-30: 10 +1#{0} +1#{0};
+  test-31: 10+ 1#{0}+ 1#{0};
+  test-32: 10 + 1#{0} + 1#{0};
+  test-33: 10+1#{0}+#{1}0;
+  test-34: 10 +1#{0} +#{1}0;
+  test-35: 10+ 1#{0}+ #{1}0;
+  test-36: 10 + 1#{0} + #{1}0;
+  test-37: 10+#{1}0+#{1}0;
+  test-38: 10 +#{1}0 +#{1}0;
+  test-39: 10+ #{1}0+ #{1}0;
+  test-40: 10 + #{1}0 + #{1}0;
+  test-41: #{10}+#{10}+#{10};
+  test-42: #{10} +#{10} +#{10};
+  test-43: #{10}+ #{10}+ #{10};
+  test-44: #{10} + #{10} + #{10};
+  test-45: #{10}+#{10}+1#{0};
+  test-46: #{10} +#{10} +1#{0};
+  test-47: #{10}+ #{10}+ 1#{0};
+  test-48: #{10} + #{10} + 1#{0};
+  test-49: #{10}+#{10}+#{1}0;
+  test-50: #{10} +#{10} +#{1}0;
+  test-51: #{10}+ #{10}+ #{1}0;
+  test-52: #{10} + #{10} + #{1}0;
+  test-53: #{10}+1#{0}+1#{0};
+  test-54: #{10} +1#{0} +1#{0};
+  test-55: #{10}+ 1#{0}+ 1#{0};
+  test-56: #{10} + 1#{0} + 1#{0};
+  test-57: #{10}+1#{0}+#{1}0;
+  test-58: #{10} +1#{0} +#{1}0;
+  test-59: #{10}+ 1#{0}+ #{1}0;
+  test-60: #{10} + 1#{0} + #{1}0;
+  test-61: #{10}+#{1}0+#{1}0;
+  test-62: #{10} +#{1}0 +#{1}0;
+  test-63: #{10}+ #{1}0+ #{1}0;
+  test-64: #{10} + #{1}0 + #{1}0;
+  test-65: 1#{0}+1#{0}+1#{0};
+  test-66: 1#{0} +1#{0} +1#{0};
+  test-67: 1#{0}+ 1#{0}+ 1#{0};
+  test-68: 1#{0} + 1#{0} + 1#{0};
+  test-69: 1#{0}+1#{0}+#{1}0;
+  test-70: 1#{0} +1#{0} +#{1}0;
+  test-71: 1#{0}+ 1#{0}+ #{1}0;
+  test-72: 1#{0} + 1#{0} + #{1}0;
+  test-73: 1#{0}+#{1}0+#{1}0;
+  test-74: 1#{0} +#{1}0 +#{1}0;
+  test-75: 1#{0}+ #{1}0+ #{1}0;
+  test-76: 1#{0} + #{1}0 + #{1}0;
+  test-77: #{1}0+#{1}0+#{1}0;
+  test-78: #{1}0 +#{1}0 +#{1}0;
+  test-79: #{1}0+ #{1}0+ #{1}0;
+  test-80: #{1}0 + #{1}0 + #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..d707aae517
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: literalliteral; test-2: literalliteral; test-3: literalliteral; test-4: literalliteral; test-5: literalquoted; test-6: literalquoted; test-7: literalquoted; test-8: literalquoted; test-9: literal+interpolant; test-10: literal +interpolant; test-11: literal+ interpolant; test-12: literal + interpolant; test-13: literallschema_ritlp; test-14: literallschema_ritlp; test-15: literallschema_ritlp; test-16: literallschema_ritlp; test-17: literal+litlp_rschema; test-18: literal +litlp_rschema; test-19: literal+ litlp_rschema; test-20: literal + litlp_rschema; test-21: "quotedquoted"; test-22: "quotedquoted"; test-23: "quotedquoted"; test-24: "quotedquoted"; test-25: "quoted"+interpolant; test-26: "quoted" +interpolant; test-27: "quoted"+ interpolant; test-28: "quoted" + interpolant; test-29: "quotedlschema_"ritlp; test-30: "quotedlschema_"ritlp; test-31: "quotedlschema_"ritlp; test-32: "quotedlschema_"ritlp; test-33: "quoted"+litlp_rschema; test-34: "quoted" +litlp_rschema; test-35: "quoted"+ litlp_rschema; test-36: "quoted" + litlp_rschema; test-37: interpolant+interpolant; test-38: interpolant +interpolant; test-39: interpolant+ interpolant; test-40: interpolant + interpolant; test-41: interpolant+lschema_ritlp; test-42: interpolant +lschema_ritlp; test-43: interpolant+ lschema_ritlp; test-44: interpolant + lschema_ritlp; test-45: interpolant+litlp_rschema; test-46: interpolant +litlp_rschema; test-47: interpolant+ litlp_rschema; test-48: interpolant + litlp_rschema; test-49: lschema_ritlp+lschema_ritlp; test-50: lschema_ritlp +lschema_ritlp; test-51: lschema_ritlp+ lschema_ritlp; test-52: lschema_ritlp + lschema_ritlp; test-53: lschema_ritlp+litlp_rschema; test-54: lschema_ritlp +litlp_rschema; test-55: lschema_ritlp+ litlp_rschema; test-56: lschema_ritlp + litlp_rschema; test-57: litlp_rschema+litlp_rschema; test-58: litlp_rschema +litlp_rschema; test-59: litlp_rschema+ litlp_rschema; test-60: litlp_rschema + litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..680ab42938
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:literalliteral;test-2:literalliteral;test-3:literalliteral;test-4:literalliteral;test-5:literalquoted;test-6:literalquoted;test-7:literalquoted;test-8:literalquoted;test-9:literal+interpolant;test-10:literal +interpolant;test-11:literal+ interpolant;test-12:literal + interpolant;test-13:literallschema_ritlp;test-14:literallschema_ritlp;test-15:literallschema_ritlp;test-16:literallschema_ritlp;test-17:literal+litlp_rschema;test-18:literal +litlp_rschema;test-19:literal+ litlp_rschema;test-20:literal + litlp_rschema;test-21:"quotedquoted";test-22:"quotedquoted";test-23:"quotedquoted";test-24:"quotedquoted";test-25:"quoted"+interpolant;test-26:"quoted" +interpolant;test-27:"quoted"+ interpolant;test-28:"quoted" + interpolant;test-29:"quotedlschema_"ritlp;test-30:"quotedlschema_"ritlp;test-31:"quotedlschema_"ritlp;test-32:"quotedlschema_"ritlp;test-33:"quoted"+litlp_rschema;test-34:"quoted" +litlp_rschema;test-35:"quoted"+ litlp_rschema;test-36:"quoted" + litlp_rschema;test-37:interpolant+interpolant;test-38:interpolant +interpolant;test-39:interpolant+ interpolant;test-40:interpolant + interpolant;test-41:interpolant+lschema_ritlp;test-42:interpolant +lschema_ritlp;test-43:interpolant+ lschema_ritlp;test-44:interpolant + lschema_ritlp;test-45:interpolant+litlp_rschema;test-46:interpolant +litlp_rschema;test-47:interpolant+ litlp_rschema;test-48:interpolant + litlp_rschema;test-49:lschema_ritlp+lschema_ritlp;test-50:lschema_ritlp +lschema_ritlp;test-51:lschema_ritlp+ lschema_ritlp;test-52:lschema_ritlp + lschema_ritlp;test-53:lschema_ritlp+litlp_rschema;test-54:lschema_ritlp +litlp_rschema;test-55:lschema_ritlp+ litlp_rschema;test-56:lschema_ritlp + litlp_rschema;test-57:litlp_rschema+litlp_rschema;test-58:litlp_rschema +litlp_rschema;test-59:litlp_rschema+ litlp_rschema;test-60:litlp_rschema + litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..6d60e64ef6
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: literalliteral;
+  test-2: literalliteral;
+  test-3: literalliteral;
+  test-4: literalliteral;
+  test-5: literalquoted;
+  test-6: literalquoted;
+  test-7: literalquoted;
+  test-8: literalquoted;
+  test-9: literal+interpolant;
+  test-10: literal +interpolant;
+  test-11: literal+ interpolant;
+  test-12: literal + interpolant;
+  test-13: literallschema_ritlp;
+  test-14: literallschema_ritlp;
+  test-15: literallschema_ritlp;
+  test-16: literallschema_ritlp;
+  test-17: literal+litlp_rschema;
+  test-18: literal +litlp_rschema;
+  test-19: literal+ litlp_rschema;
+  test-20: literal + litlp_rschema;
+  test-21: "quotedquoted";
+  test-22: "quotedquoted";
+  test-23: "quotedquoted";
+  test-24: "quotedquoted";
+  test-25: "quoted"+interpolant;
+  test-26: "quoted" +interpolant;
+  test-27: "quoted"+ interpolant;
+  test-28: "quoted" + interpolant;
+  test-29: "quotedlschema_"ritlp;
+  test-30: "quotedlschema_"ritlp;
+  test-31: "quotedlschema_"ritlp;
+  test-32: "quotedlschema_"ritlp;
+  test-33: "quoted"+litlp_rschema;
+  test-34: "quoted" +litlp_rschema;
+  test-35: "quoted"+ litlp_rschema;
+  test-36: "quoted" + litlp_rschema;
+  test-37: interpolant+interpolant;
+  test-38: interpolant +interpolant;
+  test-39: interpolant+ interpolant;
+  test-40: interpolant + interpolant;
+  test-41: interpolant+lschema_ritlp;
+  test-42: interpolant +lschema_ritlp;
+  test-43: interpolant+ lschema_ritlp;
+  test-44: interpolant + lschema_ritlp;
+  test-45: interpolant+litlp_rschema;
+  test-46: interpolant +litlp_rschema;
+  test-47: interpolant+ litlp_rschema;
+  test-48: interpolant + litlp_rschema;
+  test-49: lschema_ritlp+lschema_ritlp;
+  test-50: lschema_ritlp +lschema_ritlp;
+  test-51: lschema_ritlp+ lschema_ritlp;
+  test-52: lschema_ritlp + lschema_ritlp;
+  test-53: lschema_ritlp+litlp_rschema;
+  test-54: lschema_ritlp +litlp_rschema;
+  test-55: lschema_ritlp+ litlp_rschema;
+  test-56: lschema_ritlp + litlp_rschema;
+  test-57: litlp_rschema+litlp_rschema;
+  test-58: litlp_rschema +litlp_rschema;
+  test-59: litlp_rschema+ litlp_rschema;
+  test-60: litlp_rschema + litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..eed3f4fb98
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: literalliteral;
+  test-2: literalliteral;
+  test-3: literalliteral;
+  test-4: literalliteral;
+  test-5: literalquoted;
+  test-6: literalquoted;
+  test-7: literalquoted;
+  test-8: literalquoted;
+  test-9: literal+interpolant;
+  test-10: literal +interpolant;
+  test-11: literal+ interpolant;
+  test-12: literal + interpolant;
+  test-13: literallschema_ritlp;
+  test-14: literallschema_ritlp;
+  test-15: literallschema_ritlp;
+  test-16: literallschema_ritlp;
+  test-17: literal+litlp_rschema;
+  test-18: literal +litlp_rschema;
+  test-19: literal+ litlp_rschema;
+  test-20: literal + litlp_rschema;
+  test-21: "quotedquoted";
+  test-22: "quotedquoted";
+  test-23: "quotedquoted";
+  test-24: "quotedquoted";
+  test-25: "quoted"+interpolant;
+  test-26: "quoted" +interpolant;
+  test-27: "quoted"+ interpolant;
+  test-28: "quoted" + interpolant;
+  test-29: "quotedlschema_"ritlp;
+  test-30: "quotedlschema_"ritlp;
+  test-31: "quotedlschema_"ritlp;
+  test-32: "quotedlschema_"ritlp;
+  test-33: "quoted"+litlp_rschema;
+  test-34: "quoted" +litlp_rschema;
+  test-35: "quoted"+ litlp_rschema;
+  test-36: "quoted" + litlp_rschema;
+  test-37: interpolant+interpolant;
+  test-38: interpolant +interpolant;
+  test-39: interpolant+ interpolant;
+  test-40: interpolant + interpolant;
+  test-41: interpolant+lschema_ritlp;
+  test-42: interpolant +lschema_ritlp;
+  test-43: interpolant+ lschema_ritlp;
+  test-44: interpolant + lschema_ritlp;
+  test-45: interpolant+litlp_rschema;
+  test-46: interpolant +litlp_rschema;
+  test-47: interpolant+ litlp_rschema;
+  test-48: interpolant + litlp_rschema;
+  test-49: lschema_ritlp+lschema_ritlp;
+  test-50: lschema_ritlp +lschema_ritlp;
+  test-51: lschema_ritlp+ lschema_ritlp;
+  test-52: lschema_ritlp + lschema_ritlp;
+  test-53: lschema_ritlp+litlp_rschema;
+  test-54: lschema_ritlp +litlp_rschema;
+  test-55: lschema_ritlp+ litlp_rschema;
+  test-56: lschema_ritlp + litlp_rschema;
+  test-57: litlp_rschema+litlp_rschema;
+  test-58: litlp_rschema +litlp_rschema;
+  test-59: litlp_rschema+ litlp_rschema;
+  test-60: litlp_rschema + litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/input.scss
new file mode 100644
index 0000000000..b2038df318
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal+literal;
+  test-2: literal +literal;
+  test-3: literal+ literal;
+  test-4: literal + literal;
+  test-5: literal+"quoted";
+  test-6: literal +"quoted";
+  test-7: literal+ "quoted";
+  test-8: literal + "quoted";
+  test-9: literal+#{interpolant};
+  test-10: literal +#{interpolant};
+  test-11: literal+ #{interpolant};
+  test-12: literal + #{interpolant};
+  test-13: literal+lschema_#{ritlp};
+  test-14: literal +lschema_#{ritlp};
+  test-15: literal+ lschema_#{ritlp};
+  test-16: literal + lschema_#{ritlp};
+  test-17: literal+#{litlp}_rschema;
+  test-18: literal +#{litlp}_rschema;
+  test-19: literal+ #{litlp}_rschema;
+  test-20: literal + #{litlp}_rschema;
+  test-21: "quoted"+"quoted";
+  test-22: "quoted" +"quoted";
+  test-23: "quoted"+ "quoted";
+  test-24: "quoted" + "quoted";
+  test-25: "quoted"+#{interpolant};
+  test-26: "quoted" +#{interpolant};
+  test-27: "quoted"+ #{interpolant};
+  test-28: "quoted" + #{interpolant};
+  test-29: "quoted"+lschema_#{ritlp};
+  test-30: "quoted" +lschema_#{ritlp};
+  test-31: "quoted"+ lschema_#{ritlp};
+  test-32: "quoted" + lschema_#{ritlp};
+  test-33: "quoted"+#{litlp}_rschema;
+  test-34: "quoted" +#{litlp}_rschema;
+  test-35: "quoted"+ #{litlp}_rschema;
+  test-36: "quoted" + #{litlp}_rschema;
+  test-37: #{interpolant}+#{interpolant};
+  test-38: #{interpolant} +#{interpolant};
+  test-39: #{interpolant}+ #{interpolant};
+  test-40: #{interpolant} + #{interpolant};
+  test-41: #{interpolant}+lschema_#{ritlp};
+  test-42: #{interpolant} +lschema_#{ritlp};
+  test-43: #{interpolant}+ lschema_#{ritlp};
+  test-44: #{interpolant} + lschema_#{ritlp};
+  test-45: #{interpolant}+#{litlp}_rschema;
+  test-46: #{interpolant} +#{litlp}_rschema;
+  test-47: #{interpolant}+ #{litlp}_rschema;
+  test-48: #{interpolant} + #{litlp}_rschema;
+  test-49: lschema_#{ritlp}+lschema_#{ritlp};
+  test-50: lschema_#{ritlp} +lschema_#{ritlp};
+  test-51: lschema_#{ritlp}+ lschema_#{ritlp};
+  test-52: lschema_#{ritlp} + lschema_#{ritlp};
+  test-53: lschema_#{ritlp}+#{litlp}_rschema;
+  test-54: lschema_#{ritlp} +#{litlp}_rschema;
+  test-55: lschema_#{ritlp}+ #{litlp}_rschema;
+  test-56: lschema_#{ritlp} + #{litlp}_rschema;
+  test-57: #{litlp}_rschema+#{litlp}_rschema;
+  test-58: #{litlp}_rschema +#{litlp}_rschema;
+  test-59: #{litlp}_rschema+ #{litlp}_rschema;
+  test-60: #{litlp}_rschema + #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/addition/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/addition/strings/tripplets/input.scss
new file mode 100644
index 0000000000..7fa81ceb83
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/addition/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal+literal+literal;
+  test-2: literal +literal +literal;
+  test-3: literal+ literal+ literal;
+  test-4: literal + literal + literal;
+  test-5: literal+literal+"quoted";
+  test-6: literal +literal +"quoted";
+  test-7: literal+ literal+ "quoted";
+  test-8: literal + literal + "quoted";
+  test-9: literal+literal+#{interpolant};
+  test-10: literal +literal +#{interpolant};
+  test-11: literal+ literal+ #{interpolant};
+  test-12: literal + literal + #{interpolant};
+  test-13: literal+literal+lschema_#{ritlp};
+  test-14: literal +literal +lschema_#{ritlp};
+  test-15: literal+ literal+ lschema_#{ritlp};
+  test-16: literal + literal + lschema_#{ritlp};
+  test-17: literal+literal+#{litlp}_rschema;
+  test-18: literal +literal +#{litlp}_rschema;
+  test-19: literal+ literal+ #{litlp}_rschema;
+  test-20: literal + literal + #{litlp}_rschema;
+  test-21: literal+"quoted"+"quoted";
+  test-22: literal +"quoted" +"quoted";
+  test-23: literal+ "quoted"+ "quoted";
+  test-24: literal + "quoted" + "quoted";
+  test-25: literal+"quoted"+#{interpolant};
+  test-26: literal +"quoted" +#{interpolant};
+  test-27: literal+ "quoted"+ #{interpolant};
+  test-28: literal + "quoted" + #{interpolant};
+  test-29: literal+"quoted"+lschema_#{ritlp};
+  test-30: literal +"quoted" +lschema_#{ritlp};
+  test-31: literal+ "quoted"+ lschema_#{ritlp};
+  test-32: literal + "quoted" + lschema_#{ritlp};
+  test-33: literal+"quoted"+#{litlp}_rschema;
+  test-34: literal +"quoted" +#{litlp}_rschema;
+  test-35: literal+ "quoted"+ #{litlp}_rschema;
+  test-36: literal + "quoted" + #{litlp}_rschema;
+  test-37: literal+#{interpolant}+#{interpolant};
+  test-38: literal +#{interpolant} +#{interpolant};
+  test-39: literal+ #{interpolant}+ #{interpolant};
+  test-40: literal + #{interpolant} + #{interpolant};
+  test-41: literal+#{interpolant}+lschema_#{ritlp};
+  test-42: literal +#{interpolant} +lschema_#{ritlp};
+  test-43: literal+ #{interpolant}+ lschema_#{ritlp};
+  test-44: literal + #{interpolant} + lschema_#{ritlp};
+  test-45: literal+#{interpolant}+#{litlp}_rschema;
+  test-46: literal +#{interpolant} +#{litlp}_rschema;
+  test-47: literal+ #{interpolant}+ #{litlp}_rschema;
+  test-48: literal + #{interpolant} + #{litlp}_rschema;
+  test-49: literal+lschema_#{ritlp}+lschema_#{ritlp};
+  test-50: literal +lschema_#{ritlp} +lschema_#{ritlp};
+  test-51: literal+ lschema_#{ritlp}+ lschema_#{ritlp};
+  test-52: literal + lschema_#{ritlp} + lschema_#{ritlp};
+  test-53: literal+lschema_#{ritlp}+#{litlp}_rschema;
+  test-54: literal +lschema_#{ritlp} +#{litlp}_rschema;
+  test-55: literal+ lschema_#{ritlp}+ #{litlp}_rschema;
+  test-56: literal + lschema_#{ritlp} + #{litlp}_rschema;
+  test-57: literal+#{litlp}_rschema+#{litlp}_rschema;
+  test-58: literal +#{litlp}_rschema +#{litlp}_rschema;
+  test-59: literal+ #{litlp}_rschema+ #{litlp}_rschema;
+  test-60: literal + #{litlp}_rschema + #{litlp}_rschema;
+  test-61: "quoted"+"quoted"+"quoted";
+  test-62: "quoted" +"quoted" +"quoted";
+  test-63: "quoted"+ "quoted"+ "quoted";
+  test-64: "quoted" + "quoted" + "quoted";
+  test-65: "quoted"+"quoted"+#{interpolant};
+  test-66: "quoted" +"quoted" +#{interpolant};
+  test-67: "quoted"+ "quoted"+ #{interpolant};
+  test-68: "quoted" + "quoted" + #{interpolant};
+  test-69: "quoted"+"quoted"+lschema_#{ritlp};
+  test-70: "quoted" +"quoted" +lschema_#{ritlp};
+  test-71: "quoted"+ "quoted"+ lschema_#{ritlp};
+  test-72: "quoted" + "quoted" + lschema_#{ritlp};
+  test-73: "quoted"+"quoted"+#{litlp}_rschema;
+  test-74: "quoted" +"quoted" +#{litlp}_rschema;
+  test-75: "quoted"+ "quoted"+ #{litlp}_rschema;
+  test-76: "quoted" + "quoted" + #{litlp}_rschema;
+  test-77: "quoted"+#{interpolant}+#{interpolant};
+  test-78: "quoted" +#{interpolant} +#{interpolant};
+  test-79: "quoted"+ #{interpolant}+ #{interpolant};
+  test-80: "quoted" + #{interpolant} + #{interpolant};
+  test-81: "quoted"+#{interpolant}+lschema_#{ritlp};
+  test-82: "quoted" +#{interpolant} +lschema_#{ritlp};
+  test-83: "quoted"+ #{interpolant}+ lschema_#{ritlp};
+  test-84: "quoted" + #{interpolant} + lschema_#{ritlp};
+  test-85: "quoted"+#{interpolant}+#{litlp}_rschema;
+  test-86: "quoted" +#{interpolant} +#{litlp}_rschema;
+  test-87: "quoted"+ #{interpolant}+ #{litlp}_rschema;
+  test-88: "quoted" + #{interpolant} + #{litlp}_rschema;
+  test-89: "quoted"+lschema_#{ritlp}+lschema_#{ritlp};
+  test-90: "quoted" +lschema_#{ritlp} +lschema_#{ritlp};
+  test-91: "quoted"+ lschema_#{ritlp}+ lschema_#{ritlp};
+  test-92: "quoted" + lschema_#{ritlp} + lschema_#{ritlp};
+  test-93: "quoted"+lschema_#{ritlp}+#{litlp}_rschema;
+  test-94: "quoted" +lschema_#{ritlp} +#{litlp}_rschema;
+  test-95: "quoted"+ lschema_#{ritlp}+ #{litlp}_rschema;
+  test-96: "quoted" + lschema_#{ritlp} + #{litlp}_rschema;
+  test-97: "quoted"+#{litlp}_rschema+#{litlp}_rschema;
+  test-98: "quoted" +#{litlp}_rschema +#{litlp}_rschema;
+  test-99: "quoted"+ #{litlp}_rschema+ #{litlp}_rschema;
+  test-100: "quoted" + #{litlp}_rschema + #{litlp}_rschema;
+  test-101: #{interpolant}+#{interpolant}+#{interpolant};
+  test-102: #{interpolant} +#{interpolant} +#{interpolant};
+  test-103: #{interpolant}+ #{interpolant}+ #{interpolant};
+  test-104: #{interpolant} + #{interpolant} + #{interpolant};
+  test-105: #{interpolant}+#{interpolant}+lschema_#{ritlp};
+  test-106: #{interpolant} +#{interpolant} +lschema_#{ritlp};
+  test-107: #{interpolant}+ #{interpolant}+ lschema_#{ritlp};
+  test-108: #{interpolant} + #{interpolant} + lschema_#{ritlp};
+  test-109: #{interpolant}+#{interpolant}+#{litlp}_rschema;
+  test-110: #{interpolant} +#{interpolant} +#{litlp}_rschema;
+  test-111: #{interpolant}+ #{interpolant}+ #{litlp}_rschema;
+  test-112: #{interpolant} + #{interpolant} + #{litlp}_rschema;
+  test-113: #{interpolant}+lschema_#{ritlp}+lschema_#{ritlp};
+  test-114: #{interpolant} +lschema_#{ritlp} +lschema_#{ritlp};
+  test-115: #{interpolant}+ lschema_#{ritlp}+ lschema_#{ritlp};
+  test-116: #{interpolant} + lschema_#{ritlp} + lschema_#{ritlp};
+  test-117: #{interpolant}+lschema_#{ritlp}+#{litlp}_rschema;
+  test-118: #{interpolant} +lschema_#{ritlp} +#{litlp}_rschema;
+  test-119: #{interpolant}+ lschema_#{ritlp}+ #{litlp}_rschema;
+  test-120: #{interpolant} + lschema_#{ritlp} + #{litlp}_rschema;
+  test-121: #{interpolant}+#{litlp}_rschema+#{litlp}_rschema;
+  test-122: #{interpolant} +#{litlp}_rschema +#{litlp}_rschema;
+  test-123: #{interpolant}+ #{litlp}_rschema+ #{litlp}_rschema;
+  test-124: #{interpolant} + #{litlp}_rschema + #{litlp}_rschema;
+  test-125: lschema_#{ritlp}+lschema_#{ritlp}+lschema_#{ritlp};
+  test-126: lschema_#{ritlp} +lschema_#{ritlp} +lschema_#{ritlp};
+  test-127: lschema_#{ritlp}+ lschema_#{ritlp}+ lschema_#{ritlp};
+  test-128: lschema_#{ritlp} + lschema_#{ritlp} + lschema_#{ritlp};
+  test-129: lschema_#{ritlp}+lschema_#{ritlp}+#{litlp}_rschema;
+  test-130: lschema_#{ritlp} +lschema_#{ritlp} +#{litlp}_rschema;
+  test-131: lschema_#{ritlp}+ lschema_#{ritlp}+ #{litlp}_rschema;
+  test-132: lschema_#{ritlp} + lschema_#{ritlp} + #{litlp}_rschema;
+  test-133: lschema_#{ritlp}+#{litlp}_rschema+#{litlp}_rschema;
+  test-134: lschema_#{ritlp} +#{litlp}_rschema +#{litlp}_rschema;
+  test-135: lschema_#{ritlp}+ #{litlp}_rschema+ #{litlp}_rschema;
+  test-136: lschema_#{ritlp} + #{litlp}_rschema + #{litlp}_rschema;
+  test-137: #{litlp}_rschema+#{litlp}_rschema+#{litlp}_rschema;
+  test-138: #{litlp}_rschema +#{litlp}_rschema +#{litlp}_rschema;
+  test-139: #{litlp}_rschema+ #{litlp}_rschema+ #{litlp}_rschema;
+  test-140: #{litlp}_rschema + #{litlp}_rschema + #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compact.css
new file mode 100644
index 0000000000..de2351a3b7
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 10/10; test-2: 10 /10; test-3: 10/ 10; test-4: 10 / 10; test-5: 10/10px; test-6: 10 /10px; test-7: 10/ 10px; test-8: 10 / 10px; test-9: 10/10px; test-10: 10 /10px; test-11: 10/ 10px; test-12: 10 / 10px; test-13: 10/10px; test-14: 10/10px; test-15: 10/10px; test-16: 10/10px; test-17: 10/10px; test-18: 10/10px; test-19: 10/10px; test-20: 10/10px; test-21: 10/10px; test-22: 10/10px; test-23: 10/10px; test-24: 10/10px; test-25: 10px/10px; test-26: 10px /10px; test-27: 10px/ 10px; test-28: 10px / 10px; test-29: 10px/10px; test-30: 10px /10px; test-31: 10px/ 10px; test-32: 10px / 10px; test-33: 10px/10px; test-34: 10px/10px; test-35: 10px/10px; test-36: 10px/10px; test-37: 10px/10px; test-38: 10px/10px; test-39: 10px/10px; test-40: 10px/10px; test-41: 10px/10px; test-42: 10px/10px; test-43: 10px/10px; test-44: 10px/10px; test-45: 10px/10px; test-46: 10px /10px; test-47: 10px/ 10px; test-48: 10px / 10px; test-49: 10px/10px; test-50: 10px/10px; test-51: 10px/10px; test-52: 10px/10px; test-53: 10px/10px; test-54: 10px/10px; test-55: 10px/10px; test-56: 10px/10px; test-57: 10px/10px; test-58: 10px/10px; test-59: 10px/10px; test-60: 10px/10px; test-61: 10px/10px; test-62: 10px/10px; test-63: 10px/10px; test-64: 10px/10px; test-65: 10px/10px; test-66: 10px/10px; test-67: 10px/10px; test-68: 10px/10px; test-69: 10px/10px; test-70: 10px/10px; test-71: 10px/10px; test-72: 10px/10px; test-73: 10px/10px; test-74: 10px /10px; test-75: 10px/ 10px; test-76: 10px / 10px; test-77: 10px/10px; test-78: 10px /10px; test-79: 10px/ 10px; test-80: 10px / 10px; test-81: 10px/10px; test-82: 10px/10px; test-83: 10px/10px; test-84: 10px/10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compressed.css
new file mode 100644
index 0000000000..1f6aa662d9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:10/10;test-2:10 /10;test-3:10/ 10;test-4:10 / 10;test-5:10/10px;test-6:10 /10px;test-7:10/ 10px;test-8:10 / 10px;test-9:10/10px;test-10:10 /10px;test-11:10/ 10px;test-12:10 / 10px;test-13:10/10px;test-14:10/10px;test-15:10/10px;test-16:10/10px;test-17:10/10px;test-18:10/10px;test-19:10/10px;test-20:10/10px;test-21:10/10px;test-22:10/10px;test-23:10/10px;test-24:10/10px;test-25:10px/10px;test-26:10px /10px;test-27:10px/ 10px;test-28:10px / 10px;test-29:10px/10px;test-30:10px /10px;test-31:10px/ 10px;test-32:10px / 10px;test-33:10px/10px;test-34:10px/10px;test-35:10px/10px;test-36:10px/10px;test-37:10px/10px;test-38:10px/10px;test-39:10px/10px;test-40:10px/10px;test-41:10px/10px;test-42:10px/10px;test-43:10px/10px;test-44:10px/10px;test-45:10px/10px;test-46:10px /10px;test-47:10px/ 10px;test-48:10px / 10px;test-49:10px/10px;test-50:10px/10px;test-51:10px/10px;test-52:10px/10px;test-53:10px/10px;test-54:10px/10px;test-55:10px/10px;test-56:10px/10px;test-57:10px/10px;test-58:10px/10px;test-59:10px/10px;test-60:10px/10px;test-61:10px/10px;test-62:10px/10px;test-63:10px/10px;test-64:10px/10px;test-65:10px/10px;test-66:10px/10px;test-67:10px/10px;test-68:10px/10px;test-69:10px/10px;test-70:10px/10px;test-71:10px/10px;test-72:10px/10px;test-73:10px/10px;test-74:10px /10px;test-75:10px/ 10px;test-76:10px / 10px;test-77:10px/10px;test-78:10px /10px;test-79:10px/ 10px;test-80:10px / 10px;test-81:10px/10px;test-82:10px/10px;test-83:10px/10px;test-84:10px/10px}
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.expanded.css
new file mode 100644
index 0000000000..555f4fc38c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected.expanded.css
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10px;
+  test-6: 10 /10px;
+  test-7: 10/ 10px;
+  test-8: 10 / 10px;
+  test-9: 10/10px;
+  test-10: 10 /10px;
+  test-11: 10/ 10px;
+  test-12: 10 / 10px;
+  test-13: 10/10px;
+  test-14: 10/10px;
+  test-15: 10/10px;
+  test-16: 10/10px;
+  test-17: 10/10px;
+  test-18: 10/10px;
+  test-19: 10/10px;
+  test-20: 10/10px;
+  test-21: 10/10px;
+  test-22: 10/10px;
+  test-23: 10/10px;
+  test-24: 10/10px;
+  test-25: 10px/10px;
+  test-26: 10px /10px;
+  test-27: 10px/ 10px;
+  test-28: 10px / 10px;
+  test-29: 10px/10px;
+  test-30: 10px /10px;
+  test-31: 10px/ 10px;
+  test-32: 10px / 10px;
+  test-33: 10px/10px;
+  test-34: 10px/10px;
+  test-35: 10px/10px;
+  test-36: 10px/10px;
+  test-37: 10px/10px;
+  test-38: 10px/10px;
+  test-39: 10px/10px;
+  test-40: 10px/10px;
+  test-41: 10px/10px;
+  test-42: 10px/10px;
+  test-43: 10px/10px;
+  test-44: 10px/10px;
+  test-45: 10px/10px;
+  test-46: 10px /10px;
+  test-47: 10px/ 10px;
+  test-48: 10px / 10px;
+  test-49: 10px/10px;
+  test-50: 10px/10px;
+  test-51: 10px/10px;
+  test-52: 10px/10px;
+  test-53: 10px/10px;
+  test-54: 10px/10px;
+  test-55: 10px/10px;
+  test-56: 10px/10px;
+  test-57: 10px/10px;
+  test-58: 10px/10px;
+  test-59: 10px/10px;
+  test-60: 10px/10px;
+  test-61: 10px/10px;
+  test-62: 10px/10px;
+  test-63: 10px/10px;
+  test-64: 10px/10px;
+  test-65: 10px/10px;
+  test-66: 10px/10px;
+  test-67: 10px/10px;
+  test-68: 10px/10px;
+  test-69: 10px/10px;
+  test-70: 10px/10px;
+  test-71: 10px/10px;
+  test-72: 10px/10px;
+  test-73: 10px/10px;
+  test-74: 10px /10px;
+  test-75: 10px/ 10px;
+  test-76: 10px / 10px;
+  test-77: 10px/10px;
+  test-78: 10px /10px;
+  test-79: 10px/ 10px;
+  test-80: 10px / 10px;
+  test-81: 10px/10px;
+  test-82: 10px/10px;
+  test-83: 10px/10px;
+  test-84: 10px/10px;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..ea9a8c0425
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/expected_output.css
@@ -0,0 +1,85 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10px;
+  test-6: 10 /10px;
+  test-7: 10/ 10px;
+  test-8: 10 / 10px;
+  test-9: 10/10px;
+  test-10: 10 /10px;
+  test-11: 10/ 10px;
+  test-12: 10 / 10px;
+  test-13: 10/10px;
+  test-14: 10/10px;
+  test-15: 10/10px;
+  test-16: 10/10px;
+  test-17: 10/10px;
+  test-18: 10/10px;
+  test-19: 10/10px;
+  test-20: 10/10px;
+  test-21: 10/10px;
+  test-22: 10/10px;
+  test-23: 10/10px;
+  test-24: 10/10px;
+  test-25: 10px/10px;
+  test-26: 10px /10px;
+  test-27: 10px/ 10px;
+  test-28: 10px / 10px;
+  test-29: 10px/10px;
+  test-30: 10px /10px;
+  test-31: 10px/ 10px;
+  test-32: 10px / 10px;
+  test-33: 10px/10px;
+  test-34: 10px/10px;
+  test-35: 10px/10px;
+  test-36: 10px/10px;
+  test-37: 10px/10px;
+  test-38: 10px/10px;
+  test-39: 10px/10px;
+  test-40: 10px/10px;
+  test-41: 10px/10px;
+  test-42: 10px/10px;
+  test-43: 10px/10px;
+  test-44: 10px/10px;
+  test-45: 10px/10px;
+  test-46: 10px /10px;
+  test-47: 10px/ 10px;
+  test-48: 10px / 10px;
+  test-49: 10px/10px;
+  test-50: 10px/10px;
+  test-51: 10px/10px;
+  test-52: 10px/10px;
+  test-53: 10px/10px;
+  test-54: 10px/10px;
+  test-55: 10px/10px;
+  test-56: 10px/10px;
+  test-57: 10px/10px;
+  test-58: 10px/10px;
+  test-59: 10px/10px;
+  test-60: 10px/10px;
+  test-61: 10px/10px;
+  test-62: 10px/10px;
+  test-63: 10px/10px;
+  test-64: 10px/10px;
+  test-65: 10px/10px;
+  test-66: 10px/10px;
+  test-67: 10px/10px;
+  test-68: 10px/10px;
+  test-69: 10px/10px;
+  test-70: 10px/10px;
+  test-71: 10px/10px;
+  test-72: 10px/10px;
+  test-73: 10px/10px;
+  test-74: 10px /10px;
+  test-75: 10px/ 10px;
+  test-76: 10px / 10px;
+  test-77: 10px/10px;
+  test-78: 10px /10px;
+  test-79: 10px/ 10px;
+  test-80: 10px / 10px;
+  test-81: 10px/10px;
+  test-82: 10px/10px;
+  test-83: 10px/10px;
+  test-84: 10px/10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..c14aff78b4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10px;
+  test-6: 10 /10px;
+  test-7: 10/ 10px;
+  test-8: 10 / 10px;
+  test-9: 10/#{10}px;
+  test-10: 10 /#{10}px;
+  test-11: 10/ #{10}px;
+  test-12: 10 / #{10}px;
+  test-13: 10/1#{0}px;
+  test-14: 10 /1#{0}px;
+  test-15: 10/ 1#{0}px;
+  test-16: 10 / 1#{0}px;
+  test-17: 10/10#{px};
+  test-18: 10 /10#{px};
+  test-19: 10/ 10#{px};
+  test-20: 10 / 10#{px};
+  test-21: 10/10#{p}x;
+  test-22: 10 /10#{p}x;
+  test-23: 10/ 10#{p}x;
+  test-24: 10 / 10#{p}x;
+  test-25: 10px/10px;
+  test-26: 10px /10px;
+  test-27: 10px/ 10px;
+  test-28: 10px / 10px;
+  test-29: 10px/#{10}px;
+  test-30: 10px /#{10}px;
+  test-31: 10px/ #{10}px;
+  test-32: 10px / #{10}px;
+  test-33: 10px/1#{0}px;
+  test-34: 10px /1#{0}px;
+  test-35: 10px/ 1#{0}px;
+  test-36: 10px / 1#{0}px;
+  test-37: 10px/10#{px};
+  test-38: 10px /10#{px};
+  test-39: 10px/ 10#{px};
+  test-40: 10px / 10#{px};
+  test-41: 10px/10#{p}x;
+  test-42: 10px /10#{p}x;
+  test-43: 10px/ 10#{p}x;
+  test-44: 10px / 10#{p}x;
+  test-45: #{10}px/#{10}px;
+  test-46: #{10}px /#{10}px;
+  test-47: #{10}px/ #{10}px;
+  test-48: #{10}px / #{10}px;
+  test-49: #{10}px/1#{0}px;
+  test-50: #{10}px /1#{0}px;
+  test-51: #{10}px/ 1#{0}px;
+  test-52: #{10}px / 1#{0}px;
+  test-53: #{10}px/10#{px};
+  test-54: #{10}px /10#{px};
+  test-55: #{10}px/ 10#{px};
+  test-56: #{10}px / 10#{px};
+  test-57: #{10}px/10#{p}x;
+  test-58: #{10}px /10#{p}x;
+  test-59: #{10}px/ 10#{p}x;
+  test-60: #{10}px / 10#{p}x;
+  test-61: 1#{0}px/1#{0}px;
+  test-62: 1#{0}px /1#{0}px;
+  test-63: 1#{0}px/ 1#{0}px;
+  test-64: 1#{0}px / 1#{0}px;
+  test-65: 1#{0}px/10#{px};
+  test-66: 1#{0}px /10#{px};
+  test-67: 1#{0}px/ 10#{px};
+  test-68: 1#{0}px / 10#{px};
+  test-69: 1#{0}px/10#{p}x;
+  test-70: 1#{0}px /10#{p}x;
+  test-71: 1#{0}px/ 10#{p}x;
+  test-72: 1#{0}px / 10#{p}x;
+  test-73: 10#{px}/10#{px};
+  test-74: 10#{px} /10#{px};
+  test-75: 10#{px}/ 10#{px};
+  test-76: 10#{px} / 10#{px};
+  test-77: 10#{px}/10#{p}x;
+  test-78: 10#{px} /10#{p}x;
+  test-79: 10#{px}/ 10#{p}x;
+  test-80: 10#{px} / 10#{p}x;
+  test-81: 10#{p}x/10#{p}x;
+  test-82: 10#{p}x /10#{p}x;
+  test-83: 10#{p}x/ 10#{p}x;
+  test-84: 10#{p}x / 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/division/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..85afaeb252
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10/10/10;
+  test-2: 10 /10 /10;
+  test-3: 10/ 10/ 10;
+  test-4: 10 / 10 / 10;
+  test-5: 10/10/10px;
+  test-6: 10 /10 /10px;
+  test-7: 10/ 10/ 10px;
+  test-8: 10 / 10 / 10px;
+  test-9: 10/10/#{10}px;
+  test-10: 10 /10 /#{10}px;
+  test-11: 10/ 10/ #{10}px;
+  test-12: 10 / 10 / #{10}px;
+  test-13: 10/10/1#{0}px;
+  test-14: 10 /10 /1#{0}px;
+  test-15: 10/ 10/ 1#{0}px;
+  test-16: 10 / 10 / 1#{0}px;
+  test-17: 10/10/10#{px};
+  test-18: 10 /10 /10#{px};
+  test-19: 10/ 10/ 10#{px};
+  test-20: 10 / 10 / 10#{px};
+  test-21: 10/10/10#{p}x;
+  test-22: 10 /10 /10#{p}x;
+  test-23: 10/ 10/ 10#{p}x;
+  test-24: 10 / 10 / 10#{p}x;
+  test-25: 10/10px/10px;
+  test-26: 10 /10px /10px;
+  test-27: 10/ 10px/ 10px;
+  test-28: 10 / 10px / 10px;
+  test-29: 10/10px/#{10}px;
+  test-30: 10 /10px /#{10}px;
+  test-31: 10/ 10px/ #{10}px;
+  test-32: 10 / 10px / #{10}px;
+  test-33: 10/10px/1#{0}px;
+  test-34: 10 /10px /1#{0}px;
+  test-35: 10/ 10px/ 1#{0}px;
+  test-36: 10 / 10px / 1#{0}px;
+  test-37: 10/10px/10#{px};
+  test-38: 10 /10px /10#{px};
+  test-39: 10/ 10px/ 10#{px};
+  test-40: 10 / 10px / 10#{px};
+  test-41: 10/10px/10#{p}x;
+  test-42: 10 /10px /10#{p}x;
+  test-43: 10/ 10px/ 10#{p}x;
+  test-44: 10 / 10px / 10#{p}x;
+  test-45: 10/#{10}px/#{10}px;
+  test-46: 10 /#{10}px /#{10}px;
+  test-47: 10/ #{10}px/ #{10}px;
+  test-48: 10 / #{10}px / #{10}px;
+  test-49: 10/#{10}px/1#{0}px;
+  test-50: 10 /#{10}px /1#{0}px;
+  test-51: 10/ #{10}px/ 1#{0}px;
+  test-52: 10 / #{10}px / 1#{0}px;
+  test-53: 10/#{10}px/10#{px};
+  test-54: 10 /#{10}px /10#{px};
+  test-55: 10/ #{10}px/ 10#{px};
+  test-56: 10 / #{10}px / 10#{px};
+  test-57: 10/#{10}px/10#{p}x;
+  test-58: 10 /#{10}px /10#{p}x;
+  test-59: 10/ #{10}px/ 10#{p}x;
+  test-60: 10 / #{10}px / 10#{p}x;
+  test-61: 10/1#{0}px/1#{0}px;
+  test-62: 10 /1#{0}px /1#{0}px;
+  test-63: 10/ 1#{0}px/ 1#{0}px;
+  test-64: 10 / 1#{0}px / 1#{0}px;
+  test-65: 10/1#{0}px/10#{px};
+  test-66: 10 /1#{0}px /10#{px};
+  test-67: 10/ 1#{0}px/ 10#{px};
+  test-68: 10 / 1#{0}px / 10#{px};
+  test-69: 10/1#{0}px/10#{p}x;
+  test-70: 10 /1#{0}px /10#{p}x;
+  test-71: 10/ 1#{0}px/ 10#{p}x;
+  test-72: 10 / 1#{0}px / 10#{p}x;
+  test-73: 10/10#{px}/10#{px};
+  test-74: 10 /10#{px} /10#{px};
+  test-75: 10/ 10#{px}/ 10#{px};
+  test-76: 10 / 10#{px} / 10#{px};
+  test-77: 10/10#{px}/10#{p}x;
+  test-78: 10 /10#{px} /10#{p}x;
+  test-79: 10/ 10#{px}/ 10#{p}x;
+  test-80: 10 / 10#{px} / 10#{p}x;
+  test-81: 10/10#{p}x/10#{p}x;
+  test-82: 10 /10#{p}x /10#{p}x;
+  test-83: 10/ 10#{p}x/ 10#{p}x;
+  test-84: 10 / 10#{p}x / 10#{p}x;
+  test-85: 10px/10px/10px;
+  test-86: 10px /10px /10px;
+  test-87: 10px/ 10px/ 10px;
+  test-88: 10px / 10px / 10px;
+  test-89: 10px/10px/#{10}px;
+  test-90: 10px /10px /#{10}px;
+  test-91: 10px/ 10px/ #{10}px;
+  test-92: 10px / 10px / #{10}px;
+  test-93: 10px/10px/1#{0}px;
+  test-94: 10px /10px /1#{0}px;
+  test-95: 10px/ 10px/ 1#{0}px;
+  test-96: 10px / 10px / 1#{0}px;
+  test-97: 10px/10px/10#{px};
+  test-98: 10px /10px /10#{px};
+  test-99: 10px/ 10px/ 10#{px};
+  test-100: 10px / 10px / 10#{px};
+  test-101: 10px/10px/10#{p}x;
+  test-102: 10px /10px /10#{p}x;
+  test-103: 10px/ 10px/ 10#{p}x;
+  test-104: 10px / 10px / 10#{p}x;
+  test-105: 10px/#{10}px/#{10}px;
+  test-106: 10px /#{10}px /#{10}px;
+  test-107: 10px/ #{10}px/ #{10}px;
+  test-108: 10px / #{10}px / #{10}px;
+  test-109: 10px/#{10}px/1#{0}px;
+  test-110: 10px /#{10}px /1#{0}px;
+  test-111: 10px/ #{10}px/ 1#{0}px;
+  test-112: 10px / #{10}px / 1#{0}px;
+  test-113: 10px/#{10}px/10#{px};
+  test-114: 10px /#{10}px /10#{px};
+  test-115: 10px/ #{10}px/ 10#{px};
+  test-116: 10px / #{10}px / 10#{px};
+  test-117: 10px/#{10}px/10#{p}x;
+  test-118: 10px /#{10}px /10#{p}x;
+  test-119: 10px/ #{10}px/ 10#{p}x;
+  test-120: 10px / #{10}px / 10#{p}x;
+  test-121: 10px/1#{0}px/1#{0}px;
+  test-122: 10px /1#{0}px /1#{0}px;
+  test-123: 10px/ 1#{0}px/ 1#{0}px;
+  test-124: 10px / 1#{0}px / 1#{0}px;
+  test-125: 10px/1#{0}px/10#{px};
+  test-126: 10px /1#{0}px /10#{px};
+  test-127: 10px/ 1#{0}px/ 10#{px};
+  test-128: 10px / 1#{0}px / 10#{px};
+  test-129: 10px/1#{0}px/10#{p}x;
+  test-130: 10px /1#{0}px /10#{p}x;
+  test-131: 10px/ 1#{0}px/ 10#{p}x;
+  test-132: 10px / 1#{0}px / 10#{p}x;
+  test-133: 10px/10#{px}/10#{px};
+  test-134: 10px /10#{px} /10#{px};
+  test-135: 10px/ 10#{px}/ 10#{px};
+  test-136: 10px / 10#{px} / 10#{px};
+  test-137: 10px/10#{px}/10#{p}x;
+  test-138: 10px /10#{px} /10#{p}x;
+  test-139: 10px/ 10#{px}/ 10#{p}x;
+  test-140: 10px / 10#{px} / 10#{p}x;
+  test-141: 10px/10#{p}x/10#{p}x;
+  test-142: 10px /10#{p}x /10#{p}x;
+  test-143: 10px/ 10#{p}x/ 10#{p}x;
+  test-144: 10px / 10#{p}x / 10#{p}x;
+  test-145: #{10}px/#{10}px/#{10}px;
+  test-146: #{10}px /#{10}px /#{10}px;
+  test-147: #{10}px/ #{10}px/ #{10}px;
+  test-148: #{10}px / #{10}px / #{10}px;
+  test-149: #{10}px/#{10}px/1#{0}px;
+  test-150: #{10}px /#{10}px /1#{0}px;
+  test-151: #{10}px/ #{10}px/ 1#{0}px;
+  test-152: #{10}px / #{10}px / 1#{0}px;
+  test-153: #{10}px/#{10}px/10#{px};
+  test-154: #{10}px /#{10}px /10#{px};
+  test-155: #{10}px/ #{10}px/ 10#{px};
+  test-156: #{10}px / #{10}px / 10#{px};
+  test-157: #{10}px/#{10}px/10#{p}x;
+  test-158: #{10}px /#{10}px /10#{p}x;
+  test-159: #{10}px/ #{10}px/ 10#{p}x;
+  test-160: #{10}px / #{10}px / 10#{p}x;
+  test-161: #{10}px/1#{0}px/1#{0}px;
+  test-162: #{10}px /1#{0}px /1#{0}px;
+  test-163: #{10}px/ 1#{0}px/ 1#{0}px;
+  test-164: #{10}px / 1#{0}px / 1#{0}px;
+  test-165: #{10}px/1#{0}px/10#{px};
+  test-166: #{10}px /1#{0}px /10#{px};
+  test-167: #{10}px/ 1#{0}px/ 10#{px};
+  test-168: #{10}px / 1#{0}px / 10#{px};
+  test-169: #{10}px/1#{0}px/10#{p}x;
+  test-170: #{10}px /1#{0}px /10#{p}x;
+  test-171: #{10}px/ 1#{0}px/ 10#{p}x;
+  test-172: #{10}px / 1#{0}px / 10#{p}x;
+  test-173: #{10}px/10#{px}/10#{px};
+  test-174: #{10}px /10#{px} /10#{px};
+  test-175: #{10}px/ 10#{px}/ 10#{px};
+  test-176: #{10}px / 10#{px} / 10#{px};
+  test-177: #{10}px/10#{px}/10#{p}x;
+  test-178: #{10}px /10#{px} /10#{p}x;
+  test-179: #{10}px/ 10#{px}/ 10#{p}x;
+  test-180: #{10}px / 10#{px} / 10#{p}x;
+  test-181: #{10}px/10#{p}x/10#{p}x;
+  test-182: #{10}px /10#{p}x /10#{p}x;
+  test-183: #{10}px/ 10#{p}x/ 10#{p}x;
+  test-184: #{10}px / 10#{p}x / 10#{p}x;
+  test-185: 1#{0}px/1#{0}px/1#{0}px;
+  test-186: 1#{0}px /1#{0}px /1#{0}px;
+  test-187: 1#{0}px/ 1#{0}px/ 1#{0}px;
+  test-188: 1#{0}px / 1#{0}px / 1#{0}px;
+  test-189: 1#{0}px/1#{0}px/10#{px};
+  test-190: 1#{0}px /1#{0}px /10#{px};
+  test-191: 1#{0}px/ 1#{0}px/ 10#{px};
+  test-192: 1#{0}px / 1#{0}px / 10#{px};
+  test-193: 1#{0}px/1#{0}px/10#{p}x;
+  test-194: 1#{0}px /1#{0}px /10#{p}x;
+  test-195: 1#{0}px/ 1#{0}px/ 10#{p}x;
+  test-196: 1#{0}px / 1#{0}px / 10#{p}x;
+  test-197: 1#{0}px/10#{px}/10#{px};
+  test-198: 1#{0}px /10#{px} /10#{px};
+  test-199: 1#{0}px/ 10#{px}/ 10#{px};
+  test-200: 1#{0}px / 10#{px} / 10#{px};
+  test-201: 1#{0}px/10#{px}/10#{p}x;
+  test-202: 1#{0}px /10#{px} /10#{p}x;
+  test-203: 1#{0}px/ 10#{px}/ 10#{p}x;
+  test-204: 1#{0}px / 10#{px} / 10#{p}x;
+  test-205: 1#{0}px/10#{p}x/10#{p}x;
+  test-206: 1#{0}px /10#{p}x /10#{p}x;
+  test-207: 1#{0}px/ 10#{p}x/ 10#{p}x;
+  test-208: 1#{0}px / 10#{p}x / 10#{p}x;
+  test-209: 10#{px}/10#{px}/10#{px};
+  test-210: 10#{px} /10#{px} /10#{px};
+  test-211: 10#{px}/ 10#{px}/ 10#{px};
+  test-212: 10#{px} / 10#{px} / 10#{px};
+  test-213: 10#{px}/10#{px}/10#{p}x;
+  test-214: 10#{px} /10#{px} /10#{p}x;
+  test-215: 10#{px}/ 10#{px}/ 10#{p}x;
+  test-216: 10#{px} / 10#{px} / 10#{p}x;
+  test-217: 10#{px}/10#{p}x/10#{p}x;
+  test-218: 10#{px} /10#{p}x /10#{p}x;
+  test-219: 10#{px}/ 10#{p}x/ 10#{p}x;
+  test-220: 10#{px} / 10#{p}x / 10#{p}x;
+  test-221: 10#{p}x/10#{p}x/10#{p}x;
+  test-222: 10#{p}x /10#{p}x /10#{p}x;
+  test-223: 10#{p}x/ 10#{p}x/ 10#{p}x;
+  test-224: 10#{p}x / 10#{p}x / 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/error
new file mode 100644
index 0000000000..d68cd130e5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25/#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/division/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/input.scss
new file mode 100644
index 0000000000..2507f4ad7b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25/.25;
+  test-2: .25 /.25;
+  test-3: .25/ .25;
+  test-4: .25 / .25;
+  test-5: .25/-.25;
+  test-6: .25 /-.25;
+  test-7: .25/ -.25;
+  test-8: .25 / -.25;
+  test-9: .25/#{.25};
+  test-10: .25 /#{.25};
+  test-11: .25/ #{.25};
+  test-12: .25 / #{.25};
+  test-13: .25/#{-.25};
+  test-14: .25 /#{-.25};
+  test-15: .25/ #{-.25};
+  test-16: .25 / #{-.25};
+  test-17: .25/#{.}25;
+  test-18: .25 /#{.}25;
+  test-19: .25/ #{.}25;
+  test-20: .25 / #{.}25;
+  test-21: -.25/-.25;
+  test-22: -.25 /-.25;
+  test-23: -.25/ -.25;
+  test-24: -.25 / -.25;
+  test-25: -.25/#{.25};
+  test-26: -.25 /#{.25};
+  test-27: -.25/ #{.25};
+  test-28: -.25 / #{.25};
+  test-29: -.25/#{-.25};
+  test-30: -.25 /#{-.25};
+  test-31: -.25/ #{-.25};
+  test-32: -.25 / #{-.25};
+  test-33: -.25/#{.}25;
+  test-34: -.25 /#{.}25;
+  test-35: -.25/ #{.}25;
+  test-36: -.25 / #{.}25;
+  test-37: #{.25}/#{.25};
+  test-38: #{.25} /#{.25};
+  test-39: #{.25}/ #{.25};
+  test-40: #{.25} / #{.25};
+  test-41: #{.25}/#{-.25};
+  test-42: #{.25} /#{-.25};
+  test-43: #{.25}/ #{-.25};
+  test-44: #{.25} / #{-.25};
+  test-45: #{.25}/#{.}25;
+  test-46: #{.25} /#{.}25;
+  test-47: #{.25}/ #{.}25;
+  test-48: #{.25} / #{.}25;
+  test-49: #{-.25}/#{-.25};
+  test-50: #{-.25} /#{-.25};
+  test-51: #{-.25}/ #{-.25};
+  test-52: #{-.25} / #{-.25};
+  test-53: #{-.25}/#{.}25;
+  test-54: #{-.25} /#{.}25;
+  test-55: #{-.25}/ #{.}25;
+  test-56: #{-.25} / #{.}25;
+  test-57: #{.}25/#{.}25;
+  test-58: #{.}25 /#{.}25;
+  test-59: #{.}25/ #{.}25;
+  test-60: #{.}25 / #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/division/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/division/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..baed57f404
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25/.25/.25;
+  test-2: .25 /.25 /.25;
+  test-3: .25/ .25/ .25;
+  test-4: .25 / .25 / .25;
+  test-5: .25/.25/-.25;
+  test-6: .25 /.25 /-.25;
+  test-7: .25/ .25/ -.25;
+  test-8: .25 / .25 / -.25;
+  test-9: .25/.25/#{.25};
+  test-10: .25 /.25 /#{.25};
+  test-11: .25/ .25/ #{.25};
+  test-12: .25 / .25 / #{.25};
+  test-13: .25/.25/#{-.25};
+  test-14: .25 /.25 /#{-.25};
+  test-15: .25/ .25/ #{-.25};
+  test-16: .25 / .25 / #{-.25};
+  test-17: .25/.25/#{.}25;
+  test-18: .25 /.25 /#{.}25;
+  test-19: .25/ .25/ #{.}25;
+  test-20: .25 / .25 / #{.}25;
+  test-21: .25/-.25/-.25;
+  test-22: .25 /-.25 /-.25;
+  test-23: .25/ -.25/ -.25;
+  test-24: .25 / -.25 / -.25;
+  test-25: .25/-.25/#{.25};
+  test-26: .25 /-.25 /#{.25};
+  test-27: .25/ -.25/ #{.25};
+  test-28: .25 / -.25 / #{.25};
+  test-29: .25/-.25/#{-.25};
+  test-30: .25 /-.25 /#{-.25};
+  test-31: .25/ -.25/ #{-.25};
+  test-32: .25 / -.25 / #{-.25};
+  test-33: .25/-.25/#{.}25;
+  test-34: .25 /-.25 /#{.}25;
+  test-35: .25/ -.25/ #{.}25;
+  test-36: .25 / -.25 / #{.}25;
+  test-37: .25/#{.25}/#{.25};
+  test-38: .25 /#{.25} /#{.25};
+  test-39: .25/ #{.25}/ #{.25};
+  test-40: .25 / #{.25} / #{.25};
+  test-41: .25/#{.25}/#{-.25};
+  test-42: .25 /#{.25} /#{-.25};
+  test-43: .25/ #{.25}/ #{-.25};
+  test-44: .25 / #{.25} / #{-.25};
+  test-45: .25/#{.25}/#{.}25;
+  test-46: .25 /#{.25} /#{.}25;
+  test-47: .25/ #{.25}/ #{.}25;
+  test-48: .25 / #{.25} / #{.}25;
+  test-49: .25/#{-.25}/#{-.25};
+  test-50: .25 /#{-.25} /#{-.25};
+  test-51: .25/ #{-.25}/ #{-.25};
+  test-52: .25 / #{-.25} / #{-.25};
+  test-53: .25/#{-.25}/#{.}25;
+  test-54: .25 /#{-.25} /#{.}25;
+  test-55: .25/ #{-.25}/ #{.}25;
+  test-56: .25 / #{-.25} / #{.}25;
+  test-57: .25/#{.}25/#{.}25;
+  test-58: .25 /#{.}25 /#{.}25;
+  test-59: .25/ #{.}25/ #{.}25;
+  test-60: .25 / #{.}25 / #{.}25;
+  test-61: -.25/-.25/-.25;
+  test-62: -.25 /-.25 /-.25;
+  test-63: -.25/ -.25/ -.25;
+  test-64: -.25 / -.25 / -.25;
+  test-65: -.25/-.25/#{.25};
+  test-66: -.25 /-.25 /#{.25};
+  test-67: -.25/ -.25/ #{.25};
+  test-68: -.25 / -.25 / #{.25};
+  test-69: -.25/-.25/#{-.25};
+  test-70: -.25 /-.25 /#{-.25};
+  test-71: -.25/ -.25/ #{-.25};
+  test-72: -.25 / -.25 / #{-.25};
+  test-73: -.25/-.25/#{.}25;
+  test-74: -.25 /-.25 /#{.}25;
+  test-75: -.25/ -.25/ #{.}25;
+  test-76: -.25 / -.25 / #{.}25;
+  test-77: -.25/#{.25}/#{.25};
+  test-78: -.25 /#{.25} /#{.25};
+  test-79: -.25/ #{.25}/ #{.25};
+  test-80: -.25 / #{.25} / #{.25};
+  test-81: -.25/#{.25}/#{-.25};
+  test-82: -.25 /#{.25} /#{-.25};
+  test-83: -.25/ #{.25}/ #{-.25};
+  test-84: -.25 / #{.25} / #{-.25};
+  test-85: -.25/#{.25}/#{.}25;
+  test-86: -.25 /#{.25} /#{.}25;
+  test-87: -.25/ #{.25}/ #{.}25;
+  test-88: -.25 / #{.25} / #{.}25;
+  test-89: -.25/#{-.25}/#{-.25};
+  test-90: -.25 /#{-.25} /#{-.25};
+  test-91: -.25/ #{-.25}/ #{-.25};
+  test-92: -.25 / #{-.25} / #{-.25};
+  test-93: -.25/#{-.25}/#{.}25;
+  test-94: -.25 /#{-.25} /#{.}25;
+  test-95: -.25/ #{-.25}/ #{.}25;
+  test-96: -.25 / #{-.25} / #{.}25;
+  test-97: -.25/#{.}25/#{.}25;
+  test-98: -.25 /#{.}25 /#{.}25;
+  test-99: -.25/ #{.}25/ #{.}25;
+  test-100: -.25 / #{.}25 / #{.}25;
+  test-101: #{.25}/#{.25}/#{.25};
+  test-102: #{.25} /#{.25} /#{.25};
+  test-103: #{.25}/ #{.25}/ #{.25};
+  test-104: #{.25} / #{.25} / #{.25};
+  test-105: #{.25}/#{.25}/#{-.25};
+  test-106: #{.25} /#{.25} /#{-.25};
+  test-107: #{.25}/ #{.25}/ #{-.25};
+  test-108: #{.25} / #{.25} / #{-.25};
+  test-109: #{.25}/#{.25}/#{.}25;
+  test-110: #{.25} /#{.25} /#{.}25;
+  test-111: #{.25}/ #{.25}/ #{.}25;
+  test-112: #{.25} / #{.25} / #{.}25;
+  test-113: #{.25}/#{-.25}/#{-.25};
+  test-114: #{.25} /#{-.25} /#{-.25};
+  test-115: #{.25}/ #{-.25}/ #{-.25};
+  test-116: #{.25} / #{-.25} / #{-.25};
+  test-117: #{.25}/#{-.25}/#{.}25;
+  test-118: #{.25} /#{-.25} /#{.}25;
+  test-119: #{.25}/ #{-.25}/ #{.}25;
+  test-120: #{.25} / #{-.25} / #{.}25;
+  test-121: #{.25}/#{.}25/#{.}25;
+  test-122: #{.25} /#{.}25 /#{.}25;
+  test-123: #{.25}/ #{.}25/ #{.}25;
+  test-124: #{.25} / #{.}25 / #{.}25;
+  test-125: #{-.25}/#{-.25}/#{-.25};
+  test-126: #{-.25} /#{-.25} /#{-.25};
+  test-127: #{-.25}/ #{-.25}/ #{-.25};
+  test-128: #{-.25} / #{-.25} / #{-.25};
+  test-129: #{-.25}/#{-.25}/#{.}25;
+  test-130: #{-.25} /#{-.25} /#{.}25;
+  test-131: #{-.25}/ #{-.25}/ #{.}25;
+  test-132: #{-.25} / #{-.25} / #{.}25;
+  test-133: #{-.25}/#{.}25/#{.}25;
+  test-134: #{-.25} /#{.}25 /#{.}25;
+  test-135: #{-.25}/ #{.}25/ #{.}25;
+  test-136: #{-.25} / #{.}25 / #{.}25;
+  test-137: #{.}25/#{.}25/#{.}25;
+  test-138: #{.}25 /#{.}25 /#{.}25;
+  test-139: #{.}25/ #{.}25/ #{.}25;
+  test-140: #{.}25 / #{.}25 / #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compact.css
new file mode 100644
index 0000000000..3ed8a48493
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 10/10; test-2: 10 /10; test-3: 10/ 10; test-4: 10 / 10; test-5: 10/10%; test-6: 10 /10%; test-7: 10/ 10%; test-8: 10 / 10%; test-9: 10/10px; test-10: 10 /10px; test-11: 10/ 10px; test-12: 10 / 10px; test-13: 10/#AAA; test-14: 10 /#AAA; test-15: 10/ #AAA; test-16: 10 / #AAA; test-17: 10/itpl; test-18: 10 /itpl; test-19: 10/ itpl; test-20: 10 / itpl; test-21: 10%/10%; test-22: 10% /10%; test-23: 10%/ 10%; test-24: 10% / 10%; test-25: 10%/10px; test-26: 10% /10px; test-27: 10%/ 10px; test-28: 10% / 10px; test-29: 10%/#AAA; test-30: 10% /#AAA; test-31: 10%/ #AAA; test-32: 10% / #AAA; test-33: 10%/itpl; test-34: 10% /itpl; test-35: 10%/ itpl; test-36: 10% / itpl; test-37: 10px/10px; test-38: 10px /10px; test-39: 10px/ 10px; test-40: 10px / 10px; test-41: 10px/#AAA; test-42: 10px /#AAA; test-43: 10px/ #AAA; test-44: 10px / #AAA; test-45: 10px/itpl; test-46: 10px /itpl; test-47: 10px/ itpl; test-48: 10px / itpl; test-49: #AAA/#AAA; test-50: #AAA /#AAA; test-51: #AAA/ #AAA; test-52: #AAA / #AAA; test-53: #AAA/itpl; test-54: #AAA /itpl; test-55: #AAA/ itpl; test-56: #AAA / itpl; test-57: itpl/itpl; test-58: itpl /itpl; test-59: itpl/ itpl; test-60: itpl / itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compressed.css
new file mode 100644
index 0000000000..578ae32efc
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:10/10;test-2:10 /10;test-3:10/ 10;test-4:10 / 10;test-5:10/10%;test-6:10 /10%;test-7:10/ 10%;test-8:10 / 10%;test-9:10/10px;test-10:10 /10px;test-11:10/ 10px;test-12:10 / 10px;test-13:10/#AAA;test-14:10 /#AAA;test-15:10/ #AAA;test-16:10 / #AAA;test-17:10/itpl;test-18:10 /itpl;test-19:10/ itpl;test-20:10 / itpl;test-21:10%/10%;test-22:10% /10%;test-23:10%/ 10%;test-24:10% / 10%;test-25:10%/10px;test-26:10% /10px;test-27:10%/ 10px;test-28:10% / 10px;test-29:10%/#AAA;test-30:10% /#AAA;test-31:10%/ #AAA;test-32:10% / #AAA;test-33:10%/itpl;test-34:10% /itpl;test-35:10%/ itpl;test-36:10% / itpl;test-37:10px/10px;test-38:10px /10px;test-39:10px/ 10px;test-40:10px / 10px;test-41:10px/#AAA;test-42:10px /#AAA;test-43:10px/ #AAA;test-44:10px / #AAA;test-45:10px/itpl;test-46:10px /itpl;test-47:10px/ itpl;test-48:10px / itpl;test-49:#AAA/#AAA;test-50:#AAA /#AAA;test-51:#AAA/ #AAA;test-52:#AAA / #AAA;test-53:#AAA/itpl;test-54:#AAA /itpl;test-55:#AAA/ itpl;test-56:#AAA / itpl;test-57:itpl/itpl;test-58:itpl /itpl;test-59:itpl/ itpl;test-60:itpl / itpl}
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.expanded.css
new file mode 100644
index 0000000000..31e46a71fa
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10%;
+  test-6: 10 /10%;
+  test-7: 10/ 10%;
+  test-8: 10 / 10%;
+  test-9: 10/10px;
+  test-10: 10 /10px;
+  test-11: 10/ 10px;
+  test-12: 10 / 10px;
+  test-13: 10/#AAA;
+  test-14: 10 /#AAA;
+  test-15: 10/ #AAA;
+  test-16: 10 / #AAA;
+  test-17: 10/itpl;
+  test-18: 10 /itpl;
+  test-19: 10/ itpl;
+  test-20: 10 / itpl;
+  test-21: 10%/10%;
+  test-22: 10% /10%;
+  test-23: 10%/ 10%;
+  test-24: 10% / 10%;
+  test-25: 10%/10px;
+  test-26: 10% /10px;
+  test-27: 10%/ 10px;
+  test-28: 10% / 10px;
+  test-29: 10%/#AAA;
+  test-30: 10% /#AAA;
+  test-31: 10%/ #AAA;
+  test-32: 10% / #AAA;
+  test-33: 10%/itpl;
+  test-34: 10% /itpl;
+  test-35: 10%/ itpl;
+  test-36: 10% / itpl;
+  test-37: 10px/10px;
+  test-38: 10px /10px;
+  test-39: 10px/ 10px;
+  test-40: 10px / 10px;
+  test-41: 10px/#AAA;
+  test-42: 10px /#AAA;
+  test-43: 10px/ #AAA;
+  test-44: 10px / #AAA;
+  test-45: 10px/itpl;
+  test-46: 10px /itpl;
+  test-47: 10px/ itpl;
+  test-48: 10px / itpl;
+  test-49: #AAA/#AAA;
+  test-50: #AAA /#AAA;
+  test-51: #AAA/ #AAA;
+  test-52: #AAA / #AAA;
+  test-53: #AAA/itpl;
+  test-54: #AAA /itpl;
+  test-55: #AAA/ itpl;
+  test-56: #AAA / itpl;
+  test-57: itpl/itpl;
+  test-58: itpl /itpl;
+  test-59: itpl/ itpl;
+  test-60: itpl / itpl;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..807a04439c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10%;
+  test-6: 10 /10%;
+  test-7: 10/ 10%;
+  test-8: 10 / 10%;
+  test-9: 10/10px;
+  test-10: 10 /10px;
+  test-11: 10/ 10px;
+  test-12: 10 / 10px;
+  test-13: 10/#AAA;
+  test-14: 10 /#AAA;
+  test-15: 10/ #AAA;
+  test-16: 10 / #AAA;
+  test-17: 10/itpl;
+  test-18: 10 /itpl;
+  test-19: 10/ itpl;
+  test-20: 10 / itpl;
+  test-21: 10%/10%;
+  test-22: 10% /10%;
+  test-23: 10%/ 10%;
+  test-24: 10% / 10%;
+  test-25: 10%/10px;
+  test-26: 10% /10px;
+  test-27: 10%/ 10px;
+  test-28: 10% / 10px;
+  test-29: 10%/#AAA;
+  test-30: 10% /#AAA;
+  test-31: 10%/ #AAA;
+  test-32: 10% / #AAA;
+  test-33: 10%/itpl;
+  test-34: 10% /itpl;
+  test-35: 10%/ itpl;
+  test-36: 10% / itpl;
+  test-37: 10px/10px;
+  test-38: 10px /10px;
+  test-39: 10px/ 10px;
+  test-40: 10px / 10px;
+  test-41: 10px/#AAA;
+  test-42: 10px /#AAA;
+  test-43: 10px/ #AAA;
+  test-44: 10px / #AAA;
+  test-45: 10px/itpl;
+  test-46: 10px /itpl;
+  test-47: 10px/ itpl;
+  test-48: 10px / itpl;
+  test-49: #AAA/#AAA;
+  test-50: #AAA /#AAA;
+  test-51: #AAA/ #AAA;
+  test-52: #AAA / #AAA;
+  test-53: #AAA/itpl;
+  test-54: #AAA /itpl;
+  test-55: #AAA/ itpl;
+  test-56: #AAA / itpl;
+  test-57: itpl/itpl;
+  test-58: itpl /itpl;
+  test-59: itpl/ itpl;
+  test-60: itpl / itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/input.scss
new file mode 100644
index 0000000000..1310ed98ac
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10%;
+  test-6: 10 /10%;
+  test-7: 10/ 10%;
+  test-8: 10 / 10%;
+  test-9: 10/10px;
+  test-10: 10 /10px;
+  test-11: 10/ 10px;
+  test-12: 10 / 10px;
+  test-13: 10/#AAA;
+  test-14: 10 /#AAA;
+  test-15: 10/ #AAA;
+  test-16: 10 / #AAA;
+  test-17: 10/#{itpl};
+  test-18: 10 /#{itpl};
+  test-19: 10/ #{itpl};
+  test-20: 10 / #{itpl};
+  test-21: 10%/10%;
+  test-22: 10% /10%;
+  test-23: 10%/ 10%;
+  test-24: 10% / 10%;
+  test-25: 10%/10px;
+  test-26: 10% /10px;
+  test-27: 10%/ 10px;
+  test-28: 10% / 10px;
+  test-29: 10%/#AAA;
+  test-30: 10% /#AAA;
+  test-31: 10%/ #AAA;
+  test-32: 10% / #AAA;
+  test-33: 10%/#{itpl};
+  test-34: 10% /#{itpl};
+  test-35: 10%/ #{itpl};
+  test-36: 10% / #{itpl};
+  test-37: 10px/10px;
+  test-38: 10px /10px;
+  test-39: 10px/ 10px;
+  test-40: 10px / 10px;
+  test-41: 10px/#AAA;
+  test-42: 10px /#AAA;
+  test-43: 10px/ #AAA;
+  test-44: 10px / #AAA;
+  test-45: 10px/#{itpl};
+  test-46: 10px /#{itpl};
+  test-47: 10px/ #{itpl};
+  test-48: 10px / #{itpl};
+  test-49: #AAA/#AAA;
+  test-50: #AAA /#AAA;
+  test-51: #AAA/ #AAA;
+  test-52: #AAA / #AAA;
+  test-53: #AAA/#{itpl};
+  test-54: #AAA /#{itpl};
+  test-55: #AAA/ #{itpl};
+  test-56: #AAA / #{itpl};
+  test-57: #{itpl}/#{itpl};
+  test-58: #{itpl} /#{itpl};
+  test-59: #{itpl}/ #{itpl};
+  test-60: #{itpl} / #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/division/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..8b0d050b86
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10/10/10;
+  test-2: 10 /10 /10;
+  test-3: 10/ 10/ 10;
+  test-4: 10 / 10 / 10;
+  test-5: 10/10/10%;
+  test-6: 10 /10 /10%;
+  test-7: 10/ 10/ 10%;
+  test-8: 10 / 10 / 10%;
+  test-9: 10/10/10px;
+  test-10: 10 /10 /10px;
+  test-11: 10/ 10/ 10px;
+  test-12: 10 / 10 / 10px;
+  test-13: 10/10/#AAA;
+  test-14: 10 /10 /#AAA;
+  test-15: 10/ 10/ #AAA;
+  test-16: 10 / 10 / #AAA;
+  test-17: 10/10/#{itpl};
+  test-18: 10 /10 /#{itpl};
+  test-19: 10/ 10/ #{itpl};
+  test-20: 10 / 10 / #{itpl};
+  test-21: 10/10%/10%;
+  test-22: 10 /10% /10%;
+  test-23: 10/ 10%/ 10%;
+  test-24: 10 / 10% / 10%;
+  test-25: 10/10%/10px;
+  test-26: 10 /10% /10px;
+  test-27: 10/ 10%/ 10px;
+  test-28: 10 / 10% / 10px;
+  test-29: 10/10%/#AAA;
+  test-30: 10 /10% /#AAA;
+  test-31: 10/ 10%/ #AAA;
+  test-32: 10 / 10% / #AAA;
+  test-33: 10/10%/#{itpl};
+  test-34: 10 /10% /#{itpl};
+  test-35: 10/ 10%/ #{itpl};
+  test-36: 10 / 10% / #{itpl};
+  test-37: 10/10px/10px;
+  test-38: 10 /10px /10px;
+  test-39: 10/ 10px/ 10px;
+  test-40: 10 / 10px / 10px;
+  test-41: 10/10px/#AAA;
+  test-42: 10 /10px /#AAA;
+  test-43: 10/ 10px/ #AAA;
+  test-44: 10 / 10px / #AAA;
+  test-45: 10/10px/#{itpl};
+  test-46: 10 /10px /#{itpl};
+  test-47: 10/ 10px/ #{itpl};
+  test-48: 10 / 10px / #{itpl};
+  test-49: 10/#AAA/#AAA;
+  test-50: 10 /#AAA /#AAA;
+  test-51: 10/ #AAA/ #AAA;
+  test-52: 10 / #AAA / #AAA;
+  test-53: 10/#AAA/#{itpl};
+  test-54: 10 /#AAA /#{itpl};
+  test-55: 10/ #AAA/ #{itpl};
+  test-56: 10 / #AAA / #{itpl};
+  test-57: 10/#{itpl}/#{itpl};
+  test-58: 10 /#{itpl} /#{itpl};
+  test-59: 10/ #{itpl}/ #{itpl};
+  test-60: 10 / #{itpl} / #{itpl};
+  test-61: 10%/10%/10%;
+  test-62: 10% /10% /10%;
+  test-63: 10%/ 10%/ 10%;
+  test-64: 10% / 10% / 10%;
+  test-65: 10%/10%/10px;
+  test-66: 10% /10% /10px;
+  test-67: 10%/ 10%/ 10px;
+  test-68: 10% / 10% / 10px;
+  test-69: 10%/10%/#AAA;
+  test-70: 10% /10% /#AAA;
+  test-71: 10%/ 10%/ #AAA;
+  test-72: 10% / 10% / #AAA;
+  test-73: 10%/10%/#{itpl};
+  test-74: 10% /10% /#{itpl};
+  test-75: 10%/ 10%/ #{itpl};
+  test-76: 10% / 10% / #{itpl};
+  test-77: 10%/10px/10px;
+  test-78: 10% /10px /10px;
+  test-79: 10%/ 10px/ 10px;
+  test-80: 10% / 10px / 10px;
+  test-81: 10%/10px/#AAA;
+  test-82: 10% /10px /#AAA;
+  test-83: 10%/ 10px/ #AAA;
+  test-84: 10% / 10px / #AAA;
+  test-85: 10%/10px/#{itpl};
+  test-86: 10% /10px /#{itpl};
+  test-87: 10%/ 10px/ #{itpl};
+  test-88: 10% / 10px / #{itpl};
+  test-89: 10%/#AAA/#AAA;
+  test-90: 10% /#AAA /#AAA;
+  test-91: 10%/ #AAA/ #AAA;
+  test-92: 10% / #AAA / #AAA;
+  test-93: 10%/#AAA/#{itpl};
+  test-94: 10% /#AAA /#{itpl};
+  test-95: 10%/ #AAA/ #{itpl};
+  test-96: 10% / #AAA / #{itpl};
+  test-97: 10%/#{itpl}/#{itpl};
+  test-98: 10% /#{itpl} /#{itpl};
+  test-99: 10%/ #{itpl}/ #{itpl};
+  test-100: 10% / #{itpl} / #{itpl};
+  test-101: 10px/10px/10px;
+  test-102: 10px /10px /10px;
+  test-103: 10px/ 10px/ 10px;
+  test-104: 10px / 10px / 10px;
+  test-105: 10px/10px/#AAA;
+  test-106: 10px /10px /#AAA;
+  test-107: 10px/ 10px/ #AAA;
+  test-108: 10px / 10px / #AAA;
+  test-109: 10px/10px/#{itpl};
+  test-110: 10px /10px /#{itpl};
+  test-111: 10px/ 10px/ #{itpl};
+  test-112: 10px / 10px / #{itpl};
+  test-113: 10px/#AAA/#AAA;
+  test-114: 10px /#AAA /#AAA;
+  test-115: 10px/ #AAA/ #AAA;
+  test-116: 10px / #AAA / #AAA;
+  test-117: 10px/#AAA/#{itpl};
+  test-118: 10px /#AAA /#{itpl};
+  test-119: 10px/ #AAA/ #{itpl};
+  test-120: 10px / #AAA / #{itpl};
+  test-121: 10px/#{itpl}/#{itpl};
+  test-122: 10px /#{itpl} /#{itpl};
+  test-123: 10px/ #{itpl}/ #{itpl};
+  test-124: 10px / #{itpl} / #{itpl};
+  test-125: #AAA/#AAA/#AAA;
+  test-126: #AAA /#AAA /#AAA;
+  test-127: #AAA/ #AAA/ #AAA;
+  test-128: #AAA / #AAA / #AAA;
+  test-129: #AAA/#AAA/#{itpl};
+  test-130: #AAA /#AAA /#{itpl};
+  test-131: #AAA/ #AAA/ #{itpl};
+  test-132: #AAA / #AAA / #{itpl};
+  test-133: #AAA/#{itpl}/#{itpl};
+  test-134: #AAA /#{itpl} /#{itpl};
+  test-135: #AAA/ #{itpl}/ #{itpl};
+  test-136: #AAA / #{itpl} / #{itpl};
+  test-137: #{itpl}/#{itpl}/#{itpl};
+  test-138: #{itpl} /#{itpl} /#{itpl};
+  test-139: #{itpl}/ #{itpl}/ #{itpl};
+  test-140: #{itpl} / #{itpl} / #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..f572be4bd9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 10/10; test-2: 10 /10; test-3: 10/ 10; test-4: 10 / 10; test-5: 10/10; test-6: 10 /10; test-7: 10/ 10; test-8: 10 / 10; test-9: 10/10; test-10: 10/10; test-11: 10/10; test-12: 10/10; test-13: 10/10; test-14: 10 /10; test-15: 10/ 10; test-16: 10 / 10; test-17: 10/10; test-18: 10 /10; test-19: 10/ 10; test-20: 10 / 10; test-21: 10/10; test-22: 10 /10; test-23: 10/ 10; test-24: 10 / 10; test-25: 10/10; test-26: 10 /10; test-27: 10/ 10; test-28: 10 / 10; test-29: 10/10; test-30: 10 /10; test-31: 10/ 10; test-32: 10 / 10; test-33: 10/10; test-34: 10 /10; test-35: 10/ 10; test-36: 10 / 10; test-37: 10/10; test-38: 10 /10; test-39: 10/ 10; test-40: 10 / 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..9f20e12fc0
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:10/10;test-2:10 /10;test-3:10/ 10;test-4:10 / 10;test-5:10/10;test-6:10 /10;test-7:10/ 10;test-8:10 / 10;test-9:10/10;test-10:10/10;test-11:10/10;test-12:10/10;test-13:10/10;test-14:10 /10;test-15:10/ 10;test-16:10 / 10;test-17:10/10;test-18:10 /10;test-19:10/ 10;test-20:10 / 10;test-21:10/10;test-22:10 /10;test-23:10/ 10;test-24:10 / 10;test-25:10/10;test-26:10 /10;test-27:10/ 10;test-28:10 / 10;test-29:10/10;test-30:10 /10;test-31:10/ 10;test-32:10 / 10;test-33:10/10;test-34:10 /10;test-35:10/ 10;test-36:10 / 10;test-37:10/10;test-38:10 /10;test-39:10/ 10;test-40:10 / 10}
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..38837bd270
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10;
+  test-6: 10 /10;
+  test-7: 10/ 10;
+  test-8: 10 / 10;
+  test-9: 10/10;
+  test-10: 10/10;
+  test-11: 10/10;
+  test-12: 10/10;
+  test-13: 10/10;
+  test-14: 10 /10;
+  test-15: 10/ 10;
+  test-16: 10 / 10;
+  test-17: 10/10;
+  test-18: 10 /10;
+  test-19: 10/ 10;
+  test-20: 10 / 10;
+  test-21: 10/10;
+  test-22: 10 /10;
+  test-23: 10/ 10;
+  test-24: 10 / 10;
+  test-25: 10/10;
+  test-26: 10 /10;
+  test-27: 10/ 10;
+  test-28: 10 / 10;
+  test-29: 10/10;
+  test-30: 10 /10;
+  test-31: 10/ 10;
+  test-32: 10 / 10;
+  test-33: 10/10;
+  test-34: 10 /10;
+  test-35: 10/ 10;
+  test-36: 10 / 10;
+  test-37: 10/10;
+  test-38: 10 /10;
+  test-39: 10/ 10;
+  test-40: 10 / 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..02d5c79d8d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/10;
+  test-6: 10 /10;
+  test-7: 10/ 10;
+  test-8: 10 / 10;
+  test-9: 10/10;
+  test-10: 10/10;
+  test-11: 10/10;
+  test-12: 10/10;
+  test-13: 10/10;
+  test-14: 10 /10;
+  test-15: 10/ 10;
+  test-16: 10 / 10;
+  test-17: 10/10;
+  test-18: 10 /10;
+  test-19: 10/ 10;
+  test-20: 10 / 10;
+  test-21: 10/10;
+  test-22: 10 /10;
+  test-23: 10/ 10;
+  test-24: 10 / 10;
+  test-25: 10/10;
+  test-26: 10 /10;
+  test-27: 10/ 10;
+  test-28: 10 / 10;
+  test-29: 10/10;
+  test-30: 10 /10;
+  test-31: 10/ 10;
+  test-32: 10 / 10;
+  test-33: 10/10;
+  test-34: 10 /10;
+  test-35: 10/ 10;
+  test-36: 10 / 10;
+  test-37: 10/10;
+  test-38: 10 /10;
+  test-39: 10/ 10;
+  test-40: 10 / 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/input.scss
new file mode 100644
index 0000000000..46113fa351
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10/10;
+  test-2: 10 /10;
+  test-3: 10/ 10;
+  test-4: 10 / 10;
+  test-5: 10/#{10};
+  test-6: 10 /#{10};
+  test-7: 10/ #{10};
+  test-8: 10 / #{10};
+  test-9: 10/1#{0};
+  test-10: 10 /1#{0};
+  test-11: 10/ 1#{0};
+  test-12: 10 / 1#{0};
+  test-13: 10/#{1}0;
+  test-14: 10 /#{1}0;
+  test-15: 10/ #{1}0;
+  test-16: 10 / #{1}0;
+  test-17: #{10}/#{10};
+  test-18: #{10} /#{10};
+  test-19: #{10}/ #{10};
+  test-20: #{10} / #{10};
+  test-21: #{10}/1#{0};
+  test-22: #{10} /1#{0};
+  test-23: #{10}/ 1#{0};
+  test-24: #{10} / 1#{0};
+  test-25: #{10}/#{1}0;
+  test-26: #{10} /#{1}0;
+  test-27: #{10}/ #{1}0;
+  test-28: #{10} / #{1}0;
+  test-29: 1#{0}/1#{0};
+  test-30: 1#{0} /1#{0};
+  test-31: 1#{0}/ 1#{0};
+  test-32: 1#{0} / 1#{0};
+  test-33: 1#{0}/#{1}0;
+  test-34: 1#{0} /#{1}0;
+  test-35: 1#{0}/ #{1}0;
+  test-36: 1#{0} / #{1}0;
+  test-37: #{1}0/#{1}0;
+  test-38: #{1}0 /#{1}0;
+  test-39: #{1}0/ #{1}0;
+  test-40: #{1}0 / #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/division/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..3451e3189b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10/10/10;
+  test-2: 10 /10 /10;
+  test-3: 10/ 10/ 10;
+  test-4: 10 / 10 / 10;
+  test-5: 10/10/#{10};
+  test-6: 10 /10 /#{10};
+  test-7: 10/ 10/ #{10};
+  test-8: 10 / 10 / #{10};
+  test-9: 10/10/1#{0};
+  test-10: 10 /10 /1#{0};
+  test-11: 10/ 10/ 1#{0};
+  test-12: 10 / 10 / 1#{0};
+  test-13: 10/10/#{1}0;
+  test-14: 10 /10 /#{1}0;
+  test-15: 10/ 10/ #{1}0;
+  test-16: 10 / 10 / #{1}0;
+  test-17: 10/#{10}/#{10};
+  test-18: 10 /#{10} /#{10};
+  test-19: 10/ #{10}/ #{10};
+  test-20: 10 / #{10} / #{10};
+  test-21: 10/#{10}/1#{0};
+  test-22: 10 /#{10} /1#{0};
+  test-23: 10/ #{10}/ 1#{0};
+  test-24: 10 / #{10} / 1#{0};
+  test-25: 10/#{10}/#{1}0;
+  test-26: 10 /#{10} /#{1}0;
+  test-27: 10/ #{10}/ #{1}0;
+  test-28: 10 / #{10} / #{1}0;
+  test-29: 10/1#{0}/1#{0};
+  test-30: 10 /1#{0} /1#{0};
+  test-31: 10/ 1#{0}/ 1#{0};
+  test-32: 10 / 1#{0} / 1#{0};
+  test-33: 10/1#{0}/#{1}0;
+  test-34: 10 /1#{0} /#{1}0;
+  test-35: 10/ 1#{0}/ #{1}0;
+  test-36: 10 / 1#{0} / #{1}0;
+  test-37: 10/#{1}0/#{1}0;
+  test-38: 10 /#{1}0 /#{1}0;
+  test-39: 10/ #{1}0/ #{1}0;
+  test-40: 10 / #{1}0 / #{1}0;
+  test-41: #{10}/#{10}/#{10};
+  test-42: #{10} /#{10} /#{10};
+  test-43: #{10}/ #{10}/ #{10};
+  test-44: #{10} / #{10} / #{10};
+  test-45: #{10}/#{10}/1#{0};
+  test-46: #{10} /#{10} /1#{0};
+  test-47: #{10}/ #{10}/ 1#{0};
+  test-48: #{10} / #{10} / 1#{0};
+  test-49: #{10}/#{10}/#{1}0;
+  test-50: #{10} /#{10} /#{1}0;
+  test-51: #{10}/ #{10}/ #{1}0;
+  test-52: #{10} / #{10} / #{1}0;
+  test-53: #{10}/1#{0}/1#{0};
+  test-54: #{10} /1#{0} /1#{0};
+  test-55: #{10}/ 1#{0}/ 1#{0};
+  test-56: #{10} / 1#{0} / 1#{0};
+  test-57: #{10}/1#{0}/#{1}0;
+  test-58: #{10} /1#{0} /#{1}0;
+  test-59: #{10}/ 1#{0}/ #{1}0;
+  test-60: #{10} / 1#{0} / #{1}0;
+  test-61: #{10}/#{1}0/#{1}0;
+  test-62: #{10} /#{1}0 /#{1}0;
+  test-63: #{10}/ #{1}0/ #{1}0;
+  test-64: #{10} / #{1}0 / #{1}0;
+  test-65: 1#{0}/1#{0}/1#{0};
+  test-66: 1#{0} /1#{0} /1#{0};
+  test-67: 1#{0}/ 1#{0}/ 1#{0};
+  test-68: 1#{0} / 1#{0} / 1#{0};
+  test-69: 1#{0}/1#{0}/#{1}0;
+  test-70: 1#{0} /1#{0} /#{1}0;
+  test-71: 1#{0}/ 1#{0}/ #{1}0;
+  test-72: 1#{0} / 1#{0} / #{1}0;
+  test-73: 1#{0}/#{1}0/#{1}0;
+  test-74: 1#{0} /#{1}0 /#{1}0;
+  test-75: 1#{0}/ #{1}0/ #{1}0;
+  test-76: 1#{0} / #{1}0 / #{1}0;
+  test-77: #{1}0/#{1}0/#{1}0;
+  test-78: #{1}0 /#{1}0 /#{1}0;
+  test-79: #{1}0/ #{1}0/ #{1}0;
+  test-80: #{1}0 / #{1}0 / #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..d270c3323e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: literal/literal; test-2: literal /literal; test-3: literal/ literal; test-4: literal / literal; test-5: literal/"quoted"; test-6: literal /"quoted"; test-7: literal/ "quoted"; test-8: literal / "quoted"; test-9: literal/interpolant; test-10: literal /interpolant; test-11: literal/ interpolant; test-12: literal / interpolant; test-13: literal/lschema_ritlp; test-14: literal/lschema_ritlp; test-15: literal/lschema_ritlp; test-16: literal/lschema_ritlp; test-17: literal/litlp_rschema; test-18: literal /litlp_rschema; test-19: literal/ litlp_rschema; test-20: literal / litlp_rschema; test-21: "quoted"/"quoted"; test-22: "quoted" /"quoted"; test-23: "quoted"/ "quoted"; test-24: "quoted" / "quoted"; test-25: "quoted"/interpolant; test-26: "quoted" /interpolant; test-27: "quoted"/ interpolant; test-28: "quoted" / interpolant; test-29: "quoted"/lschema_ritlp; test-30: "quoted"/lschema_ritlp; test-31: "quoted"/lschema_ritlp; test-32: "quoted"/lschema_ritlp; test-33: "quoted"/litlp_rschema; test-34: "quoted" /litlp_rschema; test-35: "quoted"/ litlp_rschema; test-36: "quoted" / litlp_rschema; test-37: interpolant/interpolant; test-38: interpolant /interpolant; test-39: interpolant/ interpolant; test-40: interpolant / interpolant; test-41: interpolant/lschema_ritlp; test-42: interpolant /lschema_ritlp; test-43: interpolant/ lschema_ritlp; test-44: interpolant / lschema_ritlp; test-45: interpolant/litlp_rschema; test-46: interpolant /litlp_rschema; test-47: interpolant/ litlp_rschema; test-48: interpolant / litlp_rschema; test-49: lschema_ritlp/lschema_ritlp; test-50: lschema_ritlp /lschema_ritlp; test-51: lschema_ritlp/ lschema_ritlp; test-52: lschema_ritlp / lschema_ritlp; test-53: lschema_ritlp/litlp_rschema; test-54: lschema_ritlp /litlp_rschema; test-55: lschema_ritlp/ litlp_rschema; test-56: lschema_ritlp / litlp_rschema; test-57: litlp_rschema/litlp_rschema; test-58: litlp_rschema /litlp_rschema; test-59: litlp_rschema/ litlp_rschema; test-60: litlp_rschema / litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..d327eab0fe
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:literal/literal;test-2:literal /literal;test-3:literal/ literal;test-4:literal / literal;test-5:literal/"quoted";test-6:literal /"quoted";test-7:literal/ "quoted";test-8:literal / "quoted";test-9:literal/interpolant;test-10:literal /interpolant;test-11:literal/ interpolant;test-12:literal / interpolant;test-13:literal/lschema_ritlp;test-14:literal/lschema_ritlp;test-15:literal/lschema_ritlp;test-16:literal/lschema_ritlp;test-17:literal/litlp_rschema;test-18:literal /litlp_rschema;test-19:literal/ litlp_rschema;test-20:literal / litlp_rschema;test-21:"quoted"/"quoted";test-22:"quoted" /"quoted";test-23:"quoted"/ "quoted";test-24:"quoted" / "quoted";test-25:"quoted"/interpolant;test-26:"quoted" /interpolant;test-27:"quoted"/ interpolant;test-28:"quoted" / interpolant;test-29:"quoted"/lschema_ritlp;test-30:"quoted"/lschema_ritlp;test-31:"quoted"/lschema_ritlp;test-32:"quoted"/lschema_ritlp;test-33:"quoted"/litlp_rschema;test-34:"quoted" /litlp_rschema;test-35:"quoted"/ litlp_rschema;test-36:"quoted" / litlp_rschema;test-37:interpolant/interpolant;test-38:interpolant /interpolant;test-39:interpolant/ interpolant;test-40:interpolant / interpolant;test-41:interpolant/lschema_ritlp;test-42:interpolant /lschema_ritlp;test-43:interpolant/ lschema_ritlp;test-44:interpolant / lschema_ritlp;test-45:interpolant/litlp_rschema;test-46:interpolant /litlp_rschema;test-47:interpolant/ litlp_rschema;test-48:interpolant / litlp_rschema;test-49:lschema_ritlp/lschema_ritlp;test-50:lschema_ritlp /lschema_ritlp;test-51:lschema_ritlp/ lschema_ritlp;test-52:lschema_ritlp / lschema_ritlp;test-53:lschema_ritlp/litlp_rschema;test-54:lschema_ritlp /litlp_rschema;test-55:lschema_ritlp/ litlp_rschema;test-56:lschema_ritlp / litlp_rschema;test-57:litlp_rschema/litlp_rschema;test-58:litlp_rschema /litlp_rschema;test-59:litlp_rschema/ litlp_rschema;test-60:litlp_rschema / litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..1bdb5ce05a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal/literal;
+  test-2: literal /literal;
+  test-3: literal/ literal;
+  test-4: literal / literal;
+  test-5: literal/"quoted";
+  test-6: literal /"quoted";
+  test-7: literal/ "quoted";
+  test-8: literal / "quoted";
+  test-9: literal/interpolant;
+  test-10: literal /interpolant;
+  test-11: literal/ interpolant;
+  test-12: literal / interpolant;
+  test-13: literal/lschema_ritlp;
+  test-14: literal/lschema_ritlp;
+  test-15: literal/lschema_ritlp;
+  test-16: literal/lschema_ritlp;
+  test-17: literal/litlp_rschema;
+  test-18: literal /litlp_rschema;
+  test-19: literal/ litlp_rschema;
+  test-20: literal / litlp_rschema;
+  test-21: "quoted"/"quoted";
+  test-22: "quoted" /"quoted";
+  test-23: "quoted"/ "quoted";
+  test-24: "quoted" / "quoted";
+  test-25: "quoted"/interpolant;
+  test-26: "quoted" /interpolant;
+  test-27: "quoted"/ interpolant;
+  test-28: "quoted" / interpolant;
+  test-29: "quoted"/lschema_ritlp;
+  test-30: "quoted"/lschema_ritlp;
+  test-31: "quoted"/lschema_ritlp;
+  test-32: "quoted"/lschema_ritlp;
+  test-33: "quoted"/litlp_rschema;
+  test-34: "quoted" /litlp_rschema;
+  test-35: "quoted"/ litlp_rschema;
+  test-36: "quoted" / litlp_rschema;
+  test-37: interpolant/interpolant;
+  test-38: interpolant /interpolant;
+  test-39: interpolant/ interpolant;
+  test-40: interpolant / interpolant;
+  test-41: interpolant/lschema_ritlp;
+  test-42: interpolant /lschema_ritlp;
+  test-43: interpolant/ lschema_ritlp;
+  test-44: interpolant / lschema_ritlp;
+  test-45: interpolant/litlp_rschema;
+  test-46: interpolant /litlp_rschema;
+  test-47: interpolant/ litlp_rschema;
+  test-48: interpolant / litlp_rschema;
+  test-49: lschema_ritlp/lschema_ritlp;
+  test-50: lschema_ritlp /lschema_ritlp;
+  test-51: lschema_ritlp/ lschema_ritlp;
+  test-52: lschema_ritlp / lschema_ritlp;
+  test-53: lschema_ritlp/litlp_rschema;
+  test-54: lschema_ritlp /litlp_rschema;
+  test-55: lschema_ritlp/ litlp_rschema;
+  test-56: lschema_ritlp / litlp_rschema;
+  test-57: litlp_rschema/litlp_rschema;
+  test-58: litlp_rschema /litlp_rschema;
+  test-59: litlp_rschema/ litlp_rschema;
+  test-60: litlp_rschema / litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..db5966269f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: literal/literal;
+  test-2: literal /literal;
+  test-3: literal/ literal;
+  test-4: literal / literal;
+  test-5: literal/"quoted";
+  test-6: literal /"quoted";
+  test-7: literal/ "quoted";
+  test-8: literal / "quoted";
+  test-9: literal/interpolant;
+  test-10: literal /interpolant;
+  test-11: literal/ interpolant;
+  test-12: literal / interpolant;
+  test-13: literal/lschema_ritlp;
+  test-14: literal/lschema_ritlp;
+  test-15: literal/lschema_ritlp;
+  test-16: literal/lschema_ritlp;
+  test-17: literal/litlp_rschema;
+  test-18: literal /litlp_rschema;
+  test-19: literal/ litlp_rschema;
+  test-20: literal / litlp_rschema;
+  test-21: "quoted"/"quoted";
+  test-22: "quoted" /"quoted";
+  test-23: "quoted"/ "quoted";
+  test-24: "quoted" / "quoted";
+  test-25: "quoted"/interpolant;
+  test-26: "quoted" /interpolant;
+  test-27: "quoted"/ interpolant;
+  test-28: "quoted" / interpolant;
+  test-29: "quoted"/lschema_ritlp;
+  test-30: "quoted"/lschema_ritlp;
+  test-31: "quoted"/lschema_ritlp;
+  test-32: "quoted"/lschema_ritlp;
+  test-33: "quoted"/litlp_rschema;
+  test-34: "quoted" /litlp_rschema;
+  test-35: "quoted"/ litlp_rschema;
+  test-36: "quoted" / litlp_rschema;
+  test-37: interpolant/interpolant;
+  test-38: interpolant /interpolant;
+  test-39: interpolant/ interpolant;
+  test-40: interpolant / interpolant;
+  test-41: interpolant/lschema_ritlp;
+  test-42: interpolant /lschema_ritlp;
+  test-43: interpolant/ lschema_ritlp;
+  test-44: interpolant / lschema_ritlp;
+  test-45: interpolant/litlp_rschema;
+  test-46: interpolant /litlp_rschema;
+  test-47: interpolant/ litlp_rschema;
+  test-48: interpolant / litlp_rschema;
+  test-49: lschema_ritlp/lschema_ritlp;
+  test-50: lschema_ritlp /lschema_ritlp;
+  test-51: lschema_ritlp/ lschema_ritlp;
+  test-52: lschema_ritlp / lschema_ritlp;
+  test-53: lschema_ritlp/litlp_rschema;
+  test-54: lschema_ritlp /litlp_rschema;
+  test-55: lschema_ritlp/ litlp_rschema;
+  test-56: lschema_ritlp / litlp_rschema;
+  test-57: litlp_rschema/litlp_rschema;
+  test-58: litlp_rschema /litlp_rschema;
+  test-59: litlp_rschema/ litlp_rschema;
+  test-60: litlp_rschema / litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/input.scss
new file mode 100644
index 0000000000..893161e73b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal/literal;
+  test-2: literal /literal;
+  test-3: literal/ literal;
+  test-4: literal / literal;
+  test-5: literal/"quoted";
+  test-6: literal /"quoted";
+  test-7: literal/ "quoted";
+  test-8: literal / "quoted";
+  test-9: literal/#{interpolant};
+  test-10: literal /#{interpolant};
+  test-11: literal/ #{interpolant};
+  test-12: literal / #{interpolant};
+  test-13: literal/lschema_#{ritlp};
+  test-14: literal /lschema_#{ritlp};
+  test-15: literal/ lschema_#{ritlp};
+  test-16: literal / lschema_#{ritlp};
+  test-17: literal/#{litlp}_rschema;
+  test-18: literal /#{litlp}_rschema;
+  test-19: literal/ #{litlp}_rschema;
+  test-20: literal / #{litlp}_rschema;
+  test-21: "quoted"/"quoted";
+  test-22: "quoted" /"quoted";
+  test-23: "quoted"/ "quoted";
+  test-24: "quoted" / "quoted";
+  test-25: "quoted"/#{interpolant};
+  test-26: "quoted" /#{interpolant};
+  test-27: "quoted"/ #{interpolant};
+  test-28: "quoted" / #{interpolant};
+  test-29: "quoted"/lschema_#{ritlp};
+  test-30: "quoted" /lschema_#{ritlp};
+  test-31: "quoted"/ lschema_#{ritlp};
+  test-32: "quoted" / lschema_#{ritlp};
+  test-33: "quoted"/#{litlp}_rschema;
+  test-34: "quoted" /#{litlp}_rschema;
+  test-35: "quoted"/ #{litlp}_rschema;
+  test-36: "quoted" / #{litlp}_rschema;
+  test-37: #{interpolant}/#{interpolant};
+  test-38: #{interpolant} /#{interpolant};
+  test-39: #{interpolant}/ #{interpolant};
+  test-40: #{interpolant} / #{interpolant};
+  test-41: #{interpolant}/lschema_#{ritlp};
+  test-42: #{interpolant} /lschema_#{ritlp};
+  test-43: #{interpolant}/ lschema_#{ritlp};
+  test-44: #{interpolant} / lschema_#{ritlp};
+  test-45: #{interpolant}/#{litlp}_rschema;
+  test-46: #{interpolant} /#{litlp}_rschema;
+  test-47: #{interpolant}/ #{litlp}_rschema;
+  test-48: #{interpolant} / #{litlp}_rschema;
+  test-49: lschema_#{ritlp}/lschema_#{ritlp};
+  test-50: lschema_#{ritlp} /lschema_#{ritlp};
+  test-51: lschema_#{ritlp}/ lschema_#{ritlp};
+  test-52: lschema_#{ritlp} / lschema_#{ritlp};
+  test-53: lschema_#{ritlp}/#{litlp}_rschema;
+  test-54: lschema_#{ritlp} /#{litlp}_rschema;
+  test-55: lschema_#{ritlp}/ #{litlp}_rschema;
+  test-56: lschema_#{ritlp} / #{litlp}_rschema;
+  test-57: #{litlp}_rschema/#{litlp}_rschema;
+  test-58: #{litlp}_rschema /#{litlp}_rschema;
+  test-59: #{litlp}_rschema/ #{litlp}_rschema;
+  test-60: #{litlp}_rschema / #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/division/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/division/strings/tripplets/input.scss
new file mode 100644
index 0000000000..edd28b00bb
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/division/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal/literal/literal;
+  test-2: literal /literal /literal;
+  test-3: literal/ literal/ literal;
+  test-4: literal / literal / literal;
+  test-5: literal/literal/"quoted";
+  test-6: literal /literal /"quoted";
+  test-7: literal/ literal/ "quoted";
+  test-8: literal / literal / "quoted";
+  test-9: literal/literal/#{interpolant};
+  test-10: literal /literal /#{interpolant};
+  test-11: literal/ literal/ #{interpolant};
+  test-12: literal / literal / #{interpolant};
+  test-13: literal/literal/lschema_#{ritlp};
+  test-14: literal /literal /lschema_#{ritlp};
+  test-15: literal/ literal/ lschema_#{ritlp};
+  test-16: literal / literal / lschema_#{ritlp};
+  test-17: literal/literal/#{litlp}_rschema;
+  test-18: literal /literal /#{litlp}_rschema;
+  test-19: literal/ literal/ #{litlp}_rschema;
+  test-20: literal / literal / #{litlp}_rschema;
+  test-21: literal/"quoted"/"quoted";
+  test-22: literal /"quoted" /"quoted";
+  test-23: literal/ "quoted"/ "quoted";
+  test-24: literal / "quoted" / "quoted";
+  test-25: literal/"quoted"/#{interpolant};
+  test-26: literal /"quoted" /#{interpolant};
+  test-27: literal/ "quoted"/ #{interpolant};
+  test-28: literal / "quoted" / #{interpolant};
+  test-29: literal/"quoted"/lschema_#{ritlp};
+  test-30: literal /"quoted" /lschema_#{ritlp};
+  test-31: literal/ "quoted"/ lschema_#{ritlp};
+  test-32: literal / "quoted" / lschema_#{ritlp};
+  test-33: literal/"quoted"/#{litlp}_rschema;
+  test-34: literal /"quoted" /#{litlp}_rschema;
+  test-35: literal/ "quoted"/ #{litlp}_rschema;
+  test-36: literal / "quoted" / #{litlp}_rschema;
+  test-37: literal/#{interpolant}/#{interpolant};
+  test-38: literal /#{interpolant} /#{interpolant};
+  test-39: literal/ #{interpolant}/ #{interpolant};
+  test-40: literal / #{interpolant} / #{interpolant};
+  test-41: literal/#{interpolant}/lschema_#{ritlp};
+  test-42: literal /#{interpolant} /lschema_#{ritlp};
+  test-43: literal/ #{interpolant}/ lschema_#{ritlp};
+  test-44: literal / #{interpolant} / lschema_#{ritlp};
+  test-45: literal/#{interpolant}/#{litlp}_rschema;
+  test-46: literal /#{interpolant} /#{litlp}_rschema;
+  test-47: literal/ #{interpolant}/ #{litlp}_rschema;
+  test-48: literal / #{interpolant} / #{litlp}_rschema;
+  test-49: literal/lschema_#{ritlp}/lschema_#{ritlp};
+  test-50: literal /lschema_#{ritlp} /lschema_#{ritlp};
+  test-51: literal/ lschema_#{ritlp}/ lschema_#{ritlp};
+  test-52: literal / lschema_#{ritlp} / lschema_#{ritlp};
+  test-53: literal/lschema_#{ritlp}/#{litlp}_rschema;
+  test-54: literal /lschema_#{ritlp} /#{litlp}_rschema;
+  test-55: literal/ lschema_#{ritlp}/ #{litlp}_rschema;
+  test-56: literal / lschema_#{ritlp} / #{litlp}_rschema;
+  test-57: literal/#{litlp}_rschema/#{litlp}_rschema;
+  test-58: literal /#{litlp}_rschema /#{litlp}_rschema;
+  test-59: literal/ #{litlp}_rschema/ #{litlp}_rschema;
+  test-60: literal / #{litlp}_rschema / #{litlp}_rschema;
+  test-61: "quoted"/"quoted"/"quoted";
+  test-62: "quoted" /"quoted" /"quoted";
+  test-63: "quoted"/ "quoted"/ "quoted";
+  test-64: "quoted" / "quoted" / "quoted";
+  test-65: "quoted"/"quoted"/#{interpolant};
+  test-66: "quoted" /"quoted" /#{interpolant};
+  test-67: "quoted"/ "quoted"/ #{interpolant};
+  test-68: "quoted" / "quoted" / #{interpolant};
+  test-69: "quoted"/"quoted"/lschema_#{ritlp};
+  test-70: "quoted" /"quoted" /lschema_#{ritlp};
+  test-71: "quoted"/ "quoted"/ lschema_#{ritlp};
+  test-72: "quoted" / "quoted" / lschema_#{ritlp};
+  test-73: "quoted"/"quoted"/#{litlp}_rschema;
+  test-74: "quoted" /"quoted" /#{litlp}_rschema;
+  test-75: "quoted"/ "quoted"/ #{litlp}_rschema;
+  test-76: "quoted" / "quoted" / #{litlp}_rschema;
+  test-77: "quoted"/#{interpolant}/#{interpolant};
+  test-78: "quoted" /#{interpolant} /#{interpolant};
+  test-79: "quoted"/ #{interpolant}/ #{interpolant};
+  test-80: "quoted" / #{interpolant} / #{interpolant};
+  test-81: "quoted"/#{interpolant}/lschema_#{ritlp};
+  test-82: "quoted" /#{interpolant} /lschema_#{ritlp};
+  test-83: "quoted"/ #{interpolant}/ lschema_#{ritlp};
+  test-84: "quoted" / #{interpolant} / lschema_#{ritlp};
+  test-85: "quoted"/#{interpolant}/#{litlp}_rschema;
+  test-86: "quoted" /#{interpolant} /#{litlp}_rschema;
+  test-87: "quoted"/ #{interpolant}/ #{litlp}_rschema;
+  test-88: "quoted" / #{interpolant} / #{litlp}_rschema;
+  test-89: "quoted"/lschema_#{ritlp}/lschema_#{ritlp};
+  test-90: "quoted" /lschema_#{ritlp} /lschema_#{ritlp};
+  test-91: "quoted"/ lschema_#{ritlp}/ lschema_#{ritlp};
+  test-92: "quoted" / lschema_#{ritlp} / lschema_#{ritlp};
+  test-93: "quoted"/lschema_#{ritlp}/#{litlp}_rschema;
+  test-94: "quoted" /lschema_#{ritlp} /#{litlp}_rschema;
+  test-95: "quoted"/ lschema_#{ritlp}/ #{litlp}_rschema;
+  test-96: "quoted" / lschema_#{ritlp} / #{litlp}_rschema;
+  test-97: "quoted"/#{litlp}_rschema/#{litlp}_rschema;
+  test-98: "quoted" /#{litlp}_rschema /#{litlp}_rschema;
+  test-99: "quoted"/ #{litlp}_rschema/ #{litlp}_rschema;
+  test-100: "quoted" / #{litlp}_rschema / #{litlp}_rschema;
+  test-101: #{interpolant}/#{interpolant}/#{interpolant};
+  test-102: #{interpolant} /#{interpolant} /#{interpolant};
+  test-103: #{interpolant}/ #{interpolant}/ #{interpolant};
+  test-104: #{interpolant} / #{interpolant} / #{interpolant};
+  test-105: #{interpolant}/#{interpolant}/lschema_#{ritlp};
+  test-106: #{interpolant} /#{interpolant} /lschema_#{ritlp};
+  test-107: #{interpolant}/ #{interpolant}/ lschema_#{ritlp};
+  test-108: #{interpolant} / #{interpolant} / lschema_#{ritlp};
+  test-109: #{interpolant}/#{interpolant}/#{litlp}_rschema;
+  test-110: #{interpolant} /#{interpolant} /#{litlp}_rschema;
+  test-111: #{interpolant}/ #{interpolant}/ #{litlp}_rschema;
+  test-112: #{interpolant} / #{interpolant} / #{litlp}_rschema;
+  test-113: #{interpolant}/lschema_#{ritlp}/lschema_#{ritlp};
+  test-114: #{interpolant} /lschema_#{ritlp} /lschema_#{ritlp};
+  test-115: #{interpolant}/ lschema_#{ritlp}/ lschema_#{ritlp};
+  test-116: #{interpolant} / lschema_#{ritlp} / lschema_#{ritlp};
+  test-117: #{interpolant}/lschema_#{ritlp}/#{litlp}_rschema;
+  test-118: #{interpolant} /lschema_#{ritlp} /#{litlp}_rschema;
+  test-119: #{interpolant}/ lschema_#{ritlp}/ #{litlp}_rschema;
+  test-120: #{interpolant} / lschema_#{ritlp} / #{litlp}_rschema;
+  test-121: #{interpolant}/#{litlp}_rschema/#{litlp}_rschema;
+  test-122: #{interpolant} /#{litlp}_rschema /#{litlp}_rschema;
+  test-123: #{interpolant}/ #{litlp}_rschema/ #{litlp}_rschema;
+  test-124: #{interpolant} / #{litlp}_rschema / #{litlp}_rschema;
+  test-125: lschema_#{ritlp}/lschema_#{ritlp}/lschema_#{ritlp};
+  test-126: lschema_#{ritlp} /lschema_#{ritlp} /lschema_#{ritlp};
+  test-127: lschema_#{ritlp}/ lschema_#{ritlp}/ lschema_#{ritlp};
+  test-128: lschema_#{ritlp} / lschema_#{ritlp} / lschema_#{ritlp};
+  test-129: lschema_#{ritlp}/lschema_#{ritlp}/#{litlp}_rschema;
+  test-130: lschema_#{ritlp} /lschema_#{ritlp} /#{litlp}_rschema;
+  test-131: lschema_#{ritlp}/ lschema_#{ritlp}/ #{litlp}_rschema;
+  test-132: lschema_#{ritlp} / lschema_#{ritlp} / #{litlp}_rschema;
+  test-133: lschema_#{ritlp}/#{litlp}_rschema/#{litlp}_rschema;
+  test-134: lschema_#{ritlp} /#{litlp}_rschema /#{litlp}_rschema;
+  test-135: lschema_#{ritlp}/ #{litlp}_rschema/ #{litlp}_rschema;
+  test-136: lschema_#{ritlp} / #{litlp}_rschema / #{litlp}_rschema;
+  test-137: #{litlp}_rschema/#{litlp}_rschema/#{litlp}_rschema;
+  test-138: #{litlp}_rschema /#{litlp}_rschema /#{litlp}_rschema;
+  test-139: #{litlp}_rschema/ #{litlp}_rschema/ #{litlp}_rschema;
+  test-140: #{litlp}_rschema / #{litlp}_rschema / #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/error
new file mode 100644
index 0000000000..f210a3a80e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/error
@@ -0,0 +1,47 @@
+DEPRECATION WARNING on line 6 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 7 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 8 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 9 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 38 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 39 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 40 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 41 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 42 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 43 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 44 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 45 of /sass/sass-spec/spec/parser/operations/logic_eq/dimensions/pairs/input.scss:
+The result of `10px == 10` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compact.css
new file mode 100644
index 0000000000..b888f8f8cb
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: true; test-6: true; test-7: true; test-8: true; test-9: 10==10px; test-10: 10 ==10px; test-11: 10== 10px; test-12: 10 == 10px; test-13: false0px; test-14: false0px; test-15: false0px; test-16: false0px; test-17: truepx; test-18: truepx; test-19: truepx; test-20: truepx; test-21: truepx; test-22: truepx; test-23: truepx; test-24: truepx; test-25: true; test-26: true; test-27: true; test-28: true; test-29: 10px==10px; test-30: 10px ==10px; test-31: 10px== 10px; test-32: 10px == 10px; test-33: false0px; test-34: false0px; test-35: false0px; test-36: false0px; test-37: truepx; test-38: truepx; test-39: truepx; test-40: truepx; test-41: truepx; test-42: truepx; test-43: truepx; test-44: truepx; test-45: 10px==10px; test-46: 10px ==10px; test-47: 10px== 10px; test-48: 10px == 10px; test-49: 10false0px; test-50: 10false0px; test-51: 10false0px; test-52: 10false0px; test-53: 10falsepx; test-54: 10falsepx; test-55: 10falsepx; test-56: 10falsepx; test-57: 10falsepx; test-58: 10falsepx; test-59: 10falsepx; test-60: 10falsepx; test-61: 10false0px; test-62: 10false0px; test-63: 10false0px; test-64: 10false0px; test-65: 10falsepx; test-66: 10falsepx; test-67: 10falsepx; test-68: 10falsepx; test-69: 10falsepx; test-70: 10falsepx; test-71: 10falsepx; test-72: 10falsepx; test-73: 10px==10px; test-74: 10px ==10px; test-75: 10px== 10px; test-76: 10px == 10px; test-77: 10px==10px; test-78: 10px ==10px; test-79: 10px== 10px; test-80: 10px == 10px; test-81: 10pfalsepx; test-82: 10pfalsepx; test-83: 10pfalsepx; test-84: 10pfalsepx; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compressed.css
new file mode 100644
index 0000000000..280e74e132
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:true;test-6:true;test-7:true;test-8:true;test-9:10==10px;test-10:10 ==10px;test-11:10== 10px;test-12:10 == 10px;test-13:false0px;test-14:false0px;test-15:false0px;test-16:false0px;test-17:truepx;test-18:truepx;test-19:truepx;test-20:truepx;test-21:truepx;test-22:truepx;test-23:truepx;test-24:truepx;test-25:true;test-26:true;test-27:true;test-28:true;test-29:10px==10px;test-30:10px ==10px;test-31:10px== 10px;test-32:10px == 10px;test-33:false0px;test-34:false0px;test-35:false0px;test-36:false0px;test-37:truepx;test-38:truepx;test-39:truepx;test-40:truepx;test-41:truepx;test-42:truepx;test-43:truepx;test-44:truepx;test-45:10px==10px;test-46:10px ==10px;test-47:10px== 10px;test-48:10px == 10px;test-49:10false0px;test-50:10false0px;test-51:10false0px;test-52:10false0px;test-53:10falsepx;test-54:10falsepx;test-55:10falsepx;test-56:10falsepx;test-57:10falsepx;test-58:10falsepx;test-59:10falsepx;test-60:10falsepx;test-61:10false0px;test-62:10false0px;test-63:10false0px;test-64:10false0px;test-65:10falsepx;test-66:10falsepx;test-67:10falsepx;test-68:10falsepx;test-69:10falsepx;test-70:10falsepx;test-71:10falsepx;test-72:10falsepx;test-73:10px==10px;test-74:10px ==10px;test-75:10px== 10px;test-76:10px == 10px;test-77:10px==10px;test-78:10px ==10px;test-79:10px== 10px;test-80:10px == 10px;test-81:10pfalsepx;test-82:10pfalsepx;test-83:10pfalsepx;test-84:10pfalsepx}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.expanded.css
new file mode 100644
index 0000000000..d5e0eaf984
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected.expanded.css
@@ -0,0 +1,86 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: 10==10px;
+  test-10: 10 ==10px;
+  test-11: 10== 10px;
+  test-12: 10 == 10px;
+  test-13: false0px;
+  test-14: false0px;
+  test-15: false0px;
+  test-16: false0px;
+  test-17: truepx;
+  test-18: truepx;
+  test-19: truepx;
+  test-20: truepx;
+  test-21: truepx;
+  test-22: truepx;
+  test-23: truepx;
+  test-24: truepx;
+  test-25: true;
+  test-26: true;
+  test-27: true;
+  test-28: true;
+  test-29: 10px==10px;
+  test-30: 10px ==10px;
+  test-31: 10px== 10px;
+  test-32: 10px == 10px;
+  test-33: false0px;
+  test-34: false0px;
+  test-35: false0px;
+  test-36: false0px;
+  test-37: truepx;
+  test-38: truepx;
+  test-39: truepx;
+  test-40: truepx;
+  test-41: truepx;
+  test-42: truepx;
+  test-43: truepx;
+  test-44: truepx;
+  test-45: 10px==10px;
+  test-46: 10px ==10px;
+  test-47: 10px== 10px;
+  test-48: 10px == 10px;
+  test-49: 10false0px;
+  test-50: 10false0px;
+  test-51: 10false0px;
+  test-52: 10false0px;
+  test-53: 10falsepx;
+  test-54: 10falsepx;
+  test-55: 10falsepx;
+  test-56: 10falsepx;
+  test-57: 10falsepx;
+  test-58: 10falsepx;
+  test-59: 10falsepx;
+  test-60: 10falsepx;
+  test-61: 10false0px;
+  test-62: 10false0px;
+  test-63: 10false0px;
+  test-64: 10false0px;
+  test-65: 10falsepx;
+  test-66: 10falsepx;
+  test-67: 10falsepx;
+  test-68: 10falsepx;
+  test-69: 10falsepx;
+  test-70: 10falsepx;
+  test-71: 10falsepx;
+  test-72: 10falsepx;
+  test-73: 10px==10px;
+  test-74: 10px ==10px;
+  test-75: 10px== 10px;
+  test-76: 10px == 10px;
+  test-77: 10px==10px;
+  test-78: 10px ==10px;
+  test-79: 10px== 10px;
+  test-80: 10px == 10px;
+  test-81: 10pfalsepx;
+  test-82: 10pfalsepx;
+  test-83: 10pfalsepx;
+  test-84: 10pfalsepx;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..b6e8103382
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/expected_output.css
@@ -0,0 +1,85 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: 10==10px;
+  test-10: 10 ==10px;
+  test-11: 10== 10px;
+  test-12: 10 == 10px;
+  test-13: false0px;
+  test-14: false0px;
+  test-15: false0px;
+  test-16: false0px;
+  test-17: truepx;
+  test-18: truepx;
+  test-19: truepx;
+  test-20: truepx;
+  test-21: truepx;
+  test-22: truepx;
+  test-23: truepx;
+  test-24: truepx;
+  test-25: true;
+  test-26: true;
+  test-27: true;
+  test-28: true;
+  test-29: 10px==10px;
+  test-30: 10px ==10px;
+  test-31: 10px== 10px;
+  test-32: 10px == 10px;
+  test-33: false0px;
+  test-34: false0px;
+  test-35: false0px;
+  test-36: false0px;
+  test-37: truepx;
+  test-38: truepx;
+  test-39: truepx;
+  test-40: truepx;
+  test-41: truepx;
+  test-42: truepx;
+  test-43: truepx;
+  test-44: truepx;
+  test-45: 10px==10px;
+  test-46: 10px ==10px;
+  test-47: 10px== 10px;
+  test-48: 10px == 10px;
+  test-49: 10false0px;
+  test-50: 10false0px;
+  test-51: 10false0px;
+  test-52: 10false0px;
+  test-53: 10falsepx;
+  test-54: 10falsepx;
+  test-55: 10falsepx;
+  test-56: 10falsepx;
+  test-57: 10falsepx;
+  test-58: 10falsepx;
+  test-59: 10falsepx;
+  test-60: 10falsepx;
+  test-61: 10false0px;
+  test-62: 10false0px;
+  test-63: 10false0px;
+  test-64: 10false0px;
+  test-65: 10falsepx;
+  test-66: 10falsepx;
+  test-67: 10falsepx;
+  test-68: 10falsepx;
+  test-69: 10falsepx;
+  test-70: 10falsepx;
+  test-71: 10falsepx;
+  test-72: 10falsepx;
+  test-73: 10px==10px;
+  test-74: 10px ==10px;
+  test-75: 10px== 10px;
+  test-76: 10px == 10px;
+  test-77: 10px==10px;
+  test-78: 10px ==10px;
+  test-79: 10px== 10px;
+  test-80: 10px == 10px;
+  test-81: 10pfalsepx;
+  test-82: 10pfalsepx;
+  test-83: 10pfalsepx;
+  test-84: 10pfalsepx; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..3f7c6175de
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10==10;
+  test-2: 10 ==10;
+  test-3: 10== 10;
+  test-4: 10 == 10;
+  test-5: 10==10px;
+  test-6: 10 ==10px;
+  test-7: 10== 10px;
+  test-8: 10 == 10px;
+  test-9: 10==#{10}px;
+  test-10: 10 ==#{10}px;
+  test-11: 10== #{10}px;
+  test-12: 10 == #{10}px;
+  test-13: 10==1#{0}px;
+  test-14: 10 ==1#{0}px;
+  test-15: 10== 1#{0}px;
+  test-16: 10 == 1#{0}px;
+  test-17: 10==10#{px};
+  test-18: 10 ==10#{px};
+  test-19: 10== 10#{px};
+  test-20: 10 == 10#{px};
+  test-21: 10==10#{p}x;
+  test-22: 10 ==10#{p}x;
+  test-23: 10== 10#{p}x;
+  test-24: 10 == 10#{p}x;
+  test-25: 10px==10px;
+  test-26: 10px ==10px;
+  test-27: 10px== 10px;
+  test-28: 10px == 10px;
+  test-29: 10px==#{10}px;
+  test-30: 10px ==#{10}px;
+  test-31: 10px== #{10}px;
+  test-32: 10px == #{10}px;
+  test-33: 10px==1#{0}px;
+  test-34: 10px ==1#{0}px;
+  test-35: 10px== 1#{0}px;
+  test-36: 10px == 1#{0}px;
+  test-37: 10px==10#{px};
+  test-38: 10px ==10#{px};
+  test-39: 10px== 10#{px};
+  test-40: 10px == 10#{px};
+  test-41: 10px==10#{p}x;
+  test-42: 10px ==10#{p}x;
+  test-43: 10px== 10#{p}x;
+  test-44: 10px == 10#{p}x;
+  test-45: #{10}px==#{10}px;
+  test-46: #{10}px ==#{10}px;
+  test-47: #{10}px== #{10}px;
+  test-48: #{10}px == #{10}px;
+  test-49: #{10}px==1#{0}px;
+  test-50: #{10}px ==1#{0}px;
+  test-51: #{10}px== 1#{0}px;
+  test-52: #{10}px == 1#{0}px;
+  test-53: #{10}px==10#{px};
+  test-54: #{10}px ==10#{px};
+  test-55: #{10}px== 10#{px};
+  test-56: #{10}px == 10#{px};
+  test-57: #{10}px==10#{p}x;
+  test-58: #{10}px ==10#{p}x;
+  test-59: #{10}px== 10#{p}x;
+  test-60: #{10}px == 10#{p}x;
+  test-61: 1#{0}px==1#{0}px;
+  test-62: 1#{0}px ==1#{0}px;
+  test-63: 1#{0}px== 1#{0}px;
+  test-64: 1#{0}px == 1#{0}px;
+  test-65: 1#{0}px==10#{px};
+  test-66: 1#{0}px ==10#{px};
+  test-67: 1#{0}px== 10#{px};
+  test-68: 1#{0}px == 10#{px};
+  test-69: 1#{0}px==10#{p}x;
+  test-70: 1#{0}px ==10#{p}x;
+  test-71: 1#{0}px== 10#{p}x;
+  test-72: 1#{0}px == 10#{p}x;
+  test-73: 10#{px}==10#{px};
+  test-74: 10#{px} ==10#{px};
+  test-75: 10#{px}== 10#{px};
+  test-76: 10#{px} == 10#{px};
+  test-77: 10#{px}==10#{p}x;
+  test-78: 10#{px} ==10#{p}x;
+  test-79: 10#{px}== 10#{p}x;
+  test-80: 10#{px} == 10#{p}x;
+  test-81: 10#{p}x==10#{p}x;
+  test-82: 10#{p}x ==10#{p}x;
+  test-83: 10#{p}x== 10#{p}x;
+  test-84: 10#{p}x == 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..bd95ac4fc2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10==10==10;
+  test-2: 10 ==10 ==10;
+  test-3: 10== 10== 10;
+  test-4: 10 == 10 == 10;
+  test-5: 10==10==10px;
+  test-6: 10 ==10 ==10px;
+  test-7: 10== 10== 10px;
+  test-8: 10 == 10 == 10px;
+  test-9: 10==10==#{10}px;
+  test-10: 10 ==10 ==#{10}px;
+  test-11: 10== 10== #{10}px;
+  test-12: 10 == 10 == #{10}px;
+  test-13: 10==10==1#{0}px;
+  test-14: 10 ==10 ==1#{0}px;
+  test-15: 10== 10== 1#{0}px;
+  test-16: 10 == 10 == 1#{0}px;
+  test-17: 10==10==10#{px};
+  test-18: 10 ==10 ==10#{px};
+  test-19: 10== 10== 10#{px};
+  test-20: 10 == 10 == 10#{px};
+  test-21: 10==10==10#{p}x;
+  test-22: 10 ==10 ==10#{p}x;
+  test-23: 10== 10== 10#{p}x;
+  test-24: 10 == 10 == 10#{p}x;
+  test-25: 10==10px==10px;
+  test-26: 10 ==10px ==10px;
+  test-27: 10== 10px== 10px;
+  test-28: 10 == 10px == 10px;
+  test-29: 10==10px==#{10}px;
+  test-30: 10 ==10px ==#{10}px;
+  test-31: 10== 10px== #{10}px;
+  test-32: 10 == 10px == #{10}px;
+  test-33: 10==10px==1#{0}px;
+  test-34: 10 ==10px ==1#{0}px;
+  test-35: 10== 10px== 1#{0}px;
+  test-36: 10 == 10px == 1#{0}px;
+  test-37: 10==10px==10#{px};
+  test-38: 10 ==10px ==10#{px};
+  test-39: 10== 10px== 10#{px};
+  test-40: 10 == 10px == 10#{px};
+  test-41: 10==10px==10#{p}x;
+  test-42: 10 ==10px ==10#{p}x;
+  test-43: 10== 10px== 10#{p}x;
+  test-44: 10 == 10px == 10#{p}x;
+  test-45: 10==#{10}px==#{10}px;
+  test-46: 10 ==#{10}px ==#{10}px;
+  test-47: 10== #{10}px== #{10}px;
+  test-48: 10 == #{10}px == #{10}px;
+  test-49: 10==#{10}px==1#{0}px;
+  test-50: 10 ==#{10}px ==1#{0}px;
+  test-51: 10== #{10}px== 1#{0}px;
+  test-52: 10 == #{10}px == 1#{0}px;
+  test-53: 10==#{10}px==10#{px};
+  test-54: 10 ==#{10}px ==10#{px};
+  test-55: 10== #{10}px== 10#{px};
+  test-56: 10 == #{10}px == 10#{px};
+  test-57: 10==#{10}px==10#{p}x;
+  test-58: 10 ==#{10}px ==10#{p}x;
+  test-59: 10== #{10}px== 10#{p}x;
+  test-60: 10 == #{10}px == 10#{p}x;
+  test-61: 10==1#{0}px==1#{0}px;
+  test-62: 10 ==1#{0}px ==1#{0}px;
+  test-63: 10== 1#{0}px== 1#{0}px;
+  test-64: 10 == 1#{0}px == 1#{0}px;
+  test-65: 10==1#{0}px==10#{px};
+  test-66: 10 ==1#{0}px ==10#{px};
+  test-67: 10== 1#{0}px== 10#{px};
+  test-68: 10 == 1#{0}px == 10#{px};
+  test-69: 10==1#{0}px==10#{p}x;
+  test-70: 10 ==1#{0}px ==10#{p}x;
+  test-71: 10== 1#{0}px== 10#{p}x;
+  test-72: 10 == 1#{0}px == 10#{p}x;
+  test-73: 10==10#{px}==10#{px};
+  test-74: 10 ==10#{px} ==10#{px};
+  test-75: 10== 10#{px}== 10#{px};
+  test-76: 10 == 10#{px} == 10#{px};
+  test-77: 10==10#{px}==10#{p}x;
+  test-78: 10 ==10#{px} ==10#{p}x;
+  test-79: 10== 10#{px}== 10#{p}x;
+  test-80: 10 == 10#{px} == 10#{p}x;
+  test-81: 10==10#{p}x==10#{p}x;
+  test-82: 10 ==10#{p}x ==10#{p}x;
+  test-83: 10== 10#{p}x== 10#{p}x;
+  test-84: 10 == 10#{p}x == 10#{p}x;
+  test-85: 10px==10px==10px;
+  test-86: 10px ==10px ==10px;
+  test-87: 10px== 10px== 10px;
+  test-88: 10px == 10px == 10px;
+  test-89: 10px==10px==#{10}px;
+  test-90: 10px ==10px ==#{10}px;
+  test-91: 10px== 10px== #{10}px;
+  test-92: 10px == 10px == #{10}px;
+  test-93: 10px==10px==1#{0}px;
+  test-94: 10px ==10px ==1#{0}px;
+  test-95: 10px== 10px== 1#{0}px;
+  test-96: 10px == 10px == 1#{0}px;
+  test-97: 10px==10px==10#{px};
+  test-98: 10px ==10px ==10#{px};
+  test-99: 10px== 10px== 10#{px};
+  test-100: 10px == 10px == 10#{px};
+  test-101: 10px==10px==10#{p}x;
+  test-102: 10px ==10px ==10#{p}x;
+  test-103: 10px== 10px== 10#{p}x;
+  test-104: 10px == 10px == 10#{p}x;
+  test-105: 10px==#{10}px==#{10}px;
+  test-106: 10px ==#{10}px ==#{10}px;
+  test-107: 10px== #{10}px== #{10}px;
+  test-108: 10px == #{10}px == #{10}px;
+  test-109: 10px==#{10}px==1#{0}px;
+  test-110: 10px ==#{10}px ==1#{0}px;
+  test-111: 10px== #{10}px== 1#{0}px;
+  test-112: 10px == #{10}px == 1#{0}px;
+  test-113: 10px==#{10}px==10#{px};
+  test-114: 10px ==#{10}px ==10#{px};
+  test-115: 10px== #{10}px== 10#{px};
+  test-116: 10px == #{10}px == 10#{px};
+  test-117: 10px==#{10}px==10#{p}x;
+  test-118: 10px ==#{10}px ==10#{p}x;
+  test-119: 10px== #{10}px== 10#{p}x;
+  test-120: 10px == #{10}px == 10#{p}x;
+  test-121: 10px==1#{0}px==1#{0}px;
+  test-122: 10px ==1#{0}px ==1#{0}px;
+  test-123: 10px== 1#{0}px== 1#{0}px;
+  test-124: 10px == 1#{0}px == 1#{0}px;
+  test-125: 10px==1#{0}px==10#{px};
+  test-126: 10px ==1#{0}px ==10#{px};
+  test-127: 10px== 1#{0}px== 10#{px};
+  test-128: 10px == 1#{0}px == 10#{px};
+  test-129: 10px==1#{0}px==10#{p}x;
+  test-130: 10px ==1#{0}px ==10#{p}x;
+  test-131: 10px== 1#{0}px== 10#{p}x;
+  test-132: 10px == 1#{0}px == 10#{p}x;
+  test-133: 10px==10#{px}==10#{px};
+  test-134: 10px ==10#{px} ==10#{px};
+  test-135: 10px== 10#{px}== 10#{px};
+  test-136: 10px == 10#{px} == 10#{px};
+  test-137: 10px==10#{px}==10#{p}x;
+  test-138: 10px ==10#{px} ==10#{p}x;
+  test-139: 10px== 10#{px}== 10#{p}x;
+  test-140: 10px == 10#{px} == 10#{p}x;
+  test-141: 10px==10#{p}x==10#{p}x;
+  test-142: 10px ==10#{p}x ==10#{p}x;
+  test-143: 10px== 10#{p}x== 10#{p}x;
+  test-144: 10px == 10#{p}x == 10#{p}x;
+  test-145: #{10}px==#{10}px==#{10}px;
+  test-146: #{10}px ==#{10}px ==#{10}px;
+  test-147: #{10}px== #{10}px== #{10}px;
+  test-148: #{10}px == #{10}px == #{10}px;
+  test-149: #{10}px==#{10}px==1#{0}px;
+  test-150: #{10}px ==#{10}px ==1#{0}px;
+  test-151: #{10}px== #{10}px== 1#{0}px;
+  test-152: #{10}px == #{10}px == 1#{0}px;
+  test-153: #{10}px==#{10}px==10#{px};
+  test-154: #{10}px ==#{10}px ==10#{px};
+  test-155: #{10}px== #{10}px== 10#{px};
+  test-156: #{10}px == #{10}px == 10#{px};
+  test-157: #{10}px==#{10}px==10#{p}x;
+  test-158: #{10}px ==#{10}px ==10#{p}x;
+  test-159: #{10}px== #{10}px== 10#{p}x;
+  test-160: #{10}px == #{10}px == 10#{p}x;
+  test-161: #{10}px==1#{0}px==1#{0}px;
+  test-162: #{10}px ==1#{0}px ==1#{0}px;
+  test-163: #{10}px== 1#{0}px== 1#{0}px;
+  test-164: #{10}px == 1#{0}px == 1#{0}px;
+  test-165: #{10}px==1#{0}px==10#{px};
+  test-166: #{10}px ==1#{0}px ==10#{px};
+  test-167: #{10}px== 1#{0}px== 10#{px};
+  test-168: #{10}px == 1#{0}px == 10#{px};
+  test-169: #{10}px==1#{0}px==10#{p}x;
+  test-170: #{10}px ==1#{0}px ==10#{p}x;
+  test-171: #{10}px== 1#{0}px== 10#{p}x;
+  test-172: #{10}px == 1#{0}px == 10#{p}x;
+  test-173: #{10}px==10#{px}==10#{px};
+  test-174: #{10}px ==10#{px} ==10#{px};
+  test-175: #{10}px== 10#{px}== 10#{px};
+  test-176: #{10}px == 10#{px} == 10#{px};
+  test-177: #{10}px==10#{px}==10#{p}x;
+  test-178: #{10}px ==10#{px} ==10#{p}x;
+  test-179: #{10}px== 10#{px}== 10#{p}x;
+  test-180: #{10}px == 10#{px} == 10#{p}x;
+  test-181: #{10}px==10#{p}x==10#{p}x;
+  test-182: #{10}px ==10#{p}x ==10#{p}x;
+  test-183: #{10}px== 10#{p}x== 10#{p}x;
+  test-184: #{10}px == 10#{p}x == 10#{p}x;
+  test-185: 1#{0}px==1#{0}px==1#{0}px;
+  test-186: 1#{0}px ==1#{0}px ==1#{0}px;
+  test-187: 1#{0}px== 1#{0}px== 1#{0}px;
+  test-188: 1#{0}px == 1#{0}px == 1#{0}px;
+  test-189: 1#{0}px==1#{0}px==10#{px};
+  test-190: 1#{0}px ==1#{0}px ==10#{px};
+  test-191: 1#{0}px== 1#{0}px== 10#{px};
+  test-192: 1#{0}px == 1#{0}px == 10#{px};
+  test-193: 1#{0}px==1#{0}px==10#{p}x;
+  test-194: 1#{0}px ==1#{0}px ==10#{p}x;
+  test-195: 1#{0}px== 1#{0}px== 10#{p}x;
+  test-196: 1#{0}px == 1#{0}px == 10#{p}x;
+  test-197: 1#{0}px==10#{px}==10#{px};
+  test-198: 1#{0}px ==10#{px} ==10#{px};
+  test-199: 1#{0}px== 10#{px}== 10#{px};
+  test-200: 1#{0}px == 10#{px} == 10#{px};
+  test-201: 1#{0}px==10#{px}==10#{p}x;
+  test-202: 1#{0}px ==10#{px} ==10#{p}x;
+  test-203: 1#{0}px== 10#{px}== 10#{p}x;
+  test-204: 1#{0}px == 10#{px} == 10#{p}x;
+  test-205: 1#{0}px==10#{p}x==10#{p}x;
+  test-206: 1#{0}px ==10#{p}x ==10#{p}x;
+  test-207: 1#{0}px== 10#{p}x== 10#{p}x;
+  test-208: 1#{0}px == 10#{p}x == 10#{p}x;
+  test-209: 10#{px}==10#{px}==10#{px};
+  test-210: 10#{px} ==10#{px} ==10#{px};
+  test-211: 10#{px}== 10#{px}== 10#{px};
+  test-212: 10#{px} == 10#{px} == 10#{px};
+  test-213: 10#{px}==10#{px}==10#{p}x;
+  test-214: 10#{px} ==10#{px} ==10#{p}x;
+  test-215: 10#{px}== 10#{px}== 10#{p}x;
+  test-216: 10#{px} == 10#{px} == 10#{p}x;
+  test-217: 10#{px}==10#{p}x==10#{p}x;
+  test-218: 10#{px} ==10#{p}x ==10#{p}x;
+  test-219: 10#{px}== 10#{p}x== 10#{p}x;
+  test-220: 10#{px} == 10#{p}x == 10#{p}x;
+  test-221: 10#{p}x==10#{p}x==10#{p}x;
+  test-222: 10#{p}x ==10#{p}x ==10#{p}x;
+  test-223: 10#{p}x== 10#{p}x== 10#{p}x;
+  test-224: 10#{p}x == 10#{p}x == 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/error
new file mode 100644
index 0000000000..62b854d596
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25==#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_eq/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/input.scss
new file mode 100644
index 0000000000..cec40c813e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25==.25;
+  test-2: .25 ==.25;
+  test-3: .25== .25;
+  test-4: .25 == .25;
+  test-5: .25==-.25;
+  test-6: .25 ==-.25;
+  test-7: .25== -.25;
+  test-8: .25 == -.25;
+  test-9: .25==#{.25};
+  test-10: .25 ==#{.25};
+  test-11: .25== #{.25};
+  test-12: .25 == #{.25};
+  test-13: .25==#{-.25};
+  test-14: .25 ==#{-.25};
+  test-15: .25== #{-.25};
+  test-16: .25 == #{-.25};
+  test-17: .25==#{.}25;
+  test-18: .25 ==#{.}25;
+  test-19: .25== #{.}25;
+  test-20: .25 == #{.}25;
+  test-21: -.25==-.25;
+  test-22: -.25 ==-.25;
+  test-23: -.25== -.25;
+  test-24: -.25 == -.25;
+  test-25: -.25==#{.25};
+  test-26: -.25 ==#{.25};
+  test-27: -.25== #{.25};
+  test-28: -.25 == #{.25};
+  test-29: -.25==#{-.25};
+  test-30: -.25 ==#{-.25};
+  test-31: -.25== #{-.25};
+  test-32: -.25 == #{-.25};
+  test-33: -.25==#{.}25;
+  test-34: -.25 ==#{.}25;
+  test-35: -.25== #{.}25;
+  test-36: -.25 == #{.}25;
+  test-37: #{.25}==#{.25};
+  test-38: #{.25} ==#{.25};
+  test-39: #{.25}== #{.25};
+  test-40: #{.25} == #{.25};
+  test-41: #{.25}==#{-.25};
+  test-42: #{.25} ==#{-.25};
+  test-43: #{.25}== #{-.25};
+  test-44: #{.25} == #{-.25};
+  test-45: #{.25}==#{.}25;
+  test-46: #{.25} ==#{.}25;
+  test-47: #{.25}== #{.}25;
+  test-48: #{.25} == #{.}25;
+  test-49: #{-.25}==#{-.25};
+  test-50: #{-.25} ==#{-.25};
+  test-51: #{-.25}== #{-.25};
+  test-52: #{-.25} == #{-.25};
+  test-53: #{-.25}==#{.}25;
+  test-54: #{-.25} ==#{.}25;
+  test-55: #{-.25}== #{.}25;
+  test-56: #{-.25} == #{.}25;
+  test-57: #{.}25==#{.}25;
+  test-58: #{.}25 ==#{.}25;
+  test-59: #{.}25== #{.}25;
+  test-60: #{.}25 == #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..a70be310ed
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25==.25==.25;
+  test-2: .25 ==.25 ==.25;
+  test-3: .25== .25== .25;
+  test-4: .25 == .25 == .25;
+  test-5: .25==.25==-.25;
+  test-6: .25 ==.25 ==-.25;
+  test-7: .25== .25== -.25;
+  test-8: .25 == .25 == -.25;
+  test-9: .25==.25==#{.25};
+  test-10: .25 ==.25 ==#{.25};
+  test-11: .25== .25== #{.25};
+  test-12: .25 == .25 == #{.25};
+  test-13: .25==.25==#{-.25};
+  test-14: .25 ==.25 ==#{-.25};
+  test-15: .25== .25== #{-.25};
+  test-16: .25 == .25 == #{-.25};
+  test-17: .25==.25==#{.}25;
+  test-18: .25 ==.25 ==#{.}25;
+  test-19: .25== .25== #{.}25;
+  test-20: .25 == .25 == #{.}25;
+  test-21: .25==-.25==-.25;
+  test-22: .25 ==-.25 ==-.25;
+  test-23: .25== -.25== -.25;
+  test-24: .25 == -.25 == -.25;
+  test-25: .25==-.25==#{.25};
+  test-26: .25 ==-.25 ==#{.25};
+  test-27: .25== -.25== #{.25};
+  test-28: .25 == -.25 == #{.25};
+  test-29: .25==-.25==#{-.25};
+  test-30: .25 ==-.25 ==#{-.25};
+  test-31: .25== -.25== #{-.25};
+  test-32: .25 == -.25 == #{-.25};
+  test-33: .25==-.25==#{.}25;
+  test-34: .25 ==-.25 ==#{.}25;
+  test-35: .25== -.25== #{.}25;
+  test-36: .25 == -.25 == #{.}25;
+  test-37: .25==#{.25}==#{.25};
+  test-38: .25 ==#{.25} ==#{.25};
+  test-39: .25== #{.25}== #{.25};
+  test-40: .25 == #{.25} == #{.25};
+  test-41: .25==#{.25}==#{-.25};
+  test-42: .25 ==#{.25} ==#{-.25};
+  test-43: .25== #{.25}== #{-.25};
+  test-44: .25 == #{.25} == #{-.25};
+  test-45: .25==#{.25}==#{.}25;
+  test-46: .25 ==#{.25} ==#{.}25;
+  test-47: .25== #{.25}== #{.}25;
+  test-48: .25 == #{.25} == #{.}25;
+  test-49: .25==#{-.25}==#{-.25};
+  test-50: .25 ==#{-.25} ==#{-.25};
+  test-51: .25== #{-.25}== #{-.25};
+  test-52: .25 == #{-.25} == #{-.25};
+  test-53: .25==#{-.25}==#{.}25;
+  test-54: .25 ==#{-.25} ==#{.}25;
+  test-55: .25== #{-.25}== #{.}25;
+  test-56: .25 == #{-.25} == #{.}25;
+  test-57: .25==#{.}25==#{.}25;
+  test-58: .25 ==#{.}25 ==#{.}25;
+  test-59: .25== #{.}25== #{.}25;
+  test-60: .25 == #{.}25 == #{.}25;
+  test-61: -.25==-.25==-.25;
+  test-62: -.25 ==-.25 ==-.25;
+  test-63: -.25== -.25== -.25;
+  test-64: -.25 == -.25 == -.25;
+  test-65: -.25==-.25==#{.25};
+  test-66: -.25 ==-.25 ==#{.25};
+  test-67: -.25== -.25== #{.25};
+  test-68: -.25 == -.25 == #{.25};
+  test-69: -.25==-.25==#{-.25};
+  test-70: -.25 ==-.25 ==#{-.25};
+  test-71: -.25== -.25== #{-.25};
+  test-72: -.25 == -.25 == #{-.25};
+  test-73: -.25==-.25==#{.}25;
+  test-74: -.25 ==-.25 ==#{.}25;
+  test-75: -.25== -.25== #{.}25;
+  test-76: -.25 == -.25 == #{.}25;
+  test-77: -.25==#{.25}==#{.25};
+  test-78: -.25 ==#{.25} ==#{.25};
+  test-79: -.25== #{.25}== #{.25};
+  test-80: -.25 == #{.25} == #{.25};
+  test-81: -.25==#{.25}==#{-.25};
+  test-82: -.25 ==#{.25} ==#{-.25};
+  test-83: -.25== #{.25}== #{-.25};
+  test-84: -.25 == #{.25} == #{-.25};
+  test-85: -.25==#{.25}==#{.}25;
+  test-86: -.25 ==#{.25} ==#{.}25;
+  test-87: -.25== #{.25}== #{.}25;
+  test-88: -.25 == #{.25} == #{.}25;
+  test-89: -.25==#{-.25}==#{-.25};
+  test-90: -.25 ==#{-.25} ==#{-.25};
+  test-91: -.25== #{-.25}== #{-.25};
+  test-92: -.25 == #{-.25} == #{-.25};
+  test-93: -.25==#{-.25}==#{.}25;
+  test-94: -.25 ==#{-.25} ==#{.}25;
+  test-95: -.25== #{-.25}== #{.}25;
+  test-96: -.25 == #{-.25} == #{.}25;
+  test-97: -.25==#{.}25==#{.}25;
+  test-98: -.25 ==#{.}25 ==#{.}25;
+  test-99: -.25== #{.}25== #{.}25;
+  test-100: -.25 == #{.}25 == #{.}25;
+  test-101: #{.25}==#{.25}==#{.25};
+  test-102: #{.25} ==#{.25} ==#{.25};
+  test-103: #{.25}== #{.25}== #{.25};
+  test-104: #{.25} == #{.25} == #{.25};
+  test-105: #{.25}==#{.25}==#{-.25};
+  test-106: #{.25} ==#{.25} ==#{-.25};
+  test-107: #{.25}== #{.25}== #{-.25};
+  test-108: #{.25} == #{.25} == #{-.25};
+  test-109: #{.25}==#{.25}==#{.}25;
+  test-110: #{.25} ==#{.25} ==#{.}25;
+  test-111: #{.25}== #{.25}== #{.}25;
+  test-112: #{.25} == #{.25} == #{.}25;
+  test-113: #{.25}==#{-.25}==#{-.25};
+  test-114: #{.25} ==#{-.25} ==#{-.25};
+  test-115: #{.25}== #{-.25}== #{-.25};
+  test-116: #{.25} == #{-.25} == #{-.25};
+  test-117: #{.25}==#{-.25}==#{.}25;
+  test-118: #{.25} ==#{-.25} ==#{.}25;
+  test-119: #{.25}== #{-.25}== #{.}25;
+  test-120: #{.25} == #{-.25} == #{.}25;
+  test-121: #{.25}==#{.}25==#{.}25;
+  test-122: #{.25} ==#{.}25 ==#{.}25;
+  test-123: #{.25}== #{.}25== #{.}25;
+  test-124: #{.25} == #{.}25 == #{.}25;
+  test-125: #{-.25}==#{-.25}==#{-.25};
+  test-126: #{-.25} ==#{-.25} ==#{-.25};
+  test-127: #{-.25}== #{-.25}== #{-.25};
+  test-128: #{-.25} == #{-.25} == #{-.25};
+  test-129: #{-.25}==#{-.25}==#{.}25;
+  test-130: #{-.25} ==#{-.25} ==#{.}25;
+  test-131: #{-.25}== #{-.25}== #{.}25;
+  test-132: #{-.25} == #{-.25} == #{.}25;
+  test-133: #{-.25}==#{.}25==#{.}25;
+  test-134: #{-.25} ==#{.}25 ==#{.}25;
+  test-135: #{-.25}== #{.}25== #{.}25;
+  test-136: #{-.25} == #{.}25 == #{.}25;
+  test-137: #{.}25==#{.}25==#{.}25;
+  test-138: #{.}25 ==#{.}25 ==#{.}25;
+  test-139: #{.}25== #{.}25== #{.}25;
+  test-140: #{.}25 == #{.}25 == #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/error
new file mode 100644
index 0000000000..15c6544b7d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/error
@@ -0,0 +1,31 @@
+DEPRECATION WARNING on line 6 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10%` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 7 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10%` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 8 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10%` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 9 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10%` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 10 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 11 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 12 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 13 of /sass/sass-spec/spec/parser/operations/logic_eq/mixed/pairs/input.scss:
+The result of `10 == 10px` will be `false` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compact.css
new file mode 100644
index 0000000000..9a5bc8ca35
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: true; test-6: true; test-7: true; test-8: true; test-9: true; test-10: true; test-11: true; test-12: true; test-13: false; test-14: false; test-15: false; test-16: false; test-17: 10==itpl; test-18: 10 ==itpl; test-19: 10== itpl; test-20: 10 == itpl; test-21: true; test-22: true; test-23: true; test-24: true; test-25: false; test-26: false; test-27: false; test-28: false; test-29: false; test-30: false; test-31: false; test-32: false; test-33: 10%==itpl; test-34: 10% ==itpl; test-35: 10%== itpl; test-36: 10% == itpl; test-37: true; test-38: true; test-39: true; test-40: true; test-41: false; test-42: false; test-43: false; test-44: false; test-45: 10px==itpl; test-46: 10px ==itpl; test-47: 10px== itpl; test-48: 10px == itpl; test-49: true; test-50: true; test-51: true; test-52: true; test-53: #AAA==itpl; test-54: #AAA ==itpl; test-55: #AAA== itpl; test-56: #AAA == itpl; test-57: itpl==itpl; test-58: itpl ==itpl; test-59: itpl== itpl; test-60: itpl == itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compressed.css
new file mode 100644
index 0000000000..8ea13f87eb
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:true;test-6:true;test-7:true;test-8:true;test-9:true;test-10:true;test-11:true;test-12:true;test-13:false;test-14:false;test-15:false;test-16:false;test-17:10==itpl;test-18:10 ==itpl;test-19:10== itpl;test-20:10 == itpl;test-21:true;test-22:true;test-23:true;test-24:true;test-25:false;test-26:false;test-27:false;test-28:false;test-29:false;test-30:false;test-31:false;test-32:false;test-33:10%==itpl;test-34:10% ==itpl;test-35:10%== itpl;test-36:10% == itpl;test-37:true;test-38:true;test-39:true;test-40:true;test-41:false;test-42:false;test-43:false;test-44:false;test-45:10px==itpl;test-46:10px ==itpl;test-47:10px== itpl;test-48:10px == itpl;test-49:true;test-50:true;test-51:true;test-52:true;test-53:#AAA==itpl;test-54:#AAA ==itpl;test-55:#AAA== itpl;test-56:#AAA == itpl;test-57:itpl==itpl;test-58:itpl ==itpl;test-59:itpl== itpl;test-60:itpl == itpl}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.expanded.css
new file mode 100644
index 0000000000..4a77bd801b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: true;
+  test-10: true;
+  test-11: true;
+  test-12: true;
+  test-13: false;
+  test-14: false;
+  test-15: false;
+  test-16: false;
+  test-17: 10==itpl;
+  test-18: 10 ==itpl;
+  test-19: 10== itpl;
+  test-20: 10 == itpl;
+  test-21: true;
+  test-22: true;
+  test-23: true;
+  test-24: true;
+  test-25: false;
+  test-26: false;
+  test-27: false;
+  test-28: false;
+  test-29: false;
+  test-30: false;
+  test-31: false;
+  test-32: false;
+  test-33: 10%==itpl;
+  test-34: 10% ==itpl;
+  test-35: 10%== itpl;
+  test-36: 10% == itpl;
+  test-37: true;
+  test-38: true;
+  test-39: true;
+  test-40: true;
+  test-41: false;
+  test-42: false;
+  test-43: false;
+  test-44: false;
+  test-45: 10px==itpl;
+  test-46: 10px ==itpl;
+  test-47: 10px== itpl;
+  test-48: 10px == itpl;
+  test-49: true;
+  test-50: true;
+  test-51: true;
+  test-52: true;
+  test-53: #AAA==itpl;
+  test-54: #AAA ==itpl;
+  test-55: #AAA== itpl;
+  test-56: #AAA == itpl;
+  test-57: itpl==itpl;
+  test-58: itpl ==itpl;
+  test-59: itpl== itpl;
+  test-60: itpl == itpl;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..065a2c8743
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: true;
+  test-10: true;
+  test-11: true;
+  test-12: true;
+  test-13: false;
+  test-14: false;
+  test-15: false;
+  test-16: false;
+  test-17: 10==itpl;
+  test-18: 10 ==itpl;
+  test-19: 10== itpl;
+  test-20: 10 == itpl;
+  test-21: true;
+  test-22: true;
+  test-23: true;
+  test-24: true;
+  test-25: false;
+  test-26: false;
+  test-27: false;
+  test-28: false;
+  test-29: false;
+  test-30: false;
+  test-31: false;
+  test-32: false;
+  test-33: 10%==itpl;
+  test-34: 10% ==itpl;
+  test-35: 10%== itpl;
+  test-36: 10% == itpl;
+  test-37: true;
+  test-38: true;
+  test-39: true;
+  test-40: true;
+  test-41: false;
+  test-42: false;
+  test-43: false;
+  test-44: false;
+  test-45: 10px==itpl;
+  test-46: 10px ==itpl;
+  test-47: 10px== itpl;
+  test-48: 10px == itpl;
+  test-49: true;
+  test-50: true;
+  test-51: true;
+  test-52: true;
+  test-53: #AAA==itpl;
+  test-54: #AAA ==itpl;
+  test-55: #AAA== itpl;
+  test-56: #AAA == itpl;
+  test-57: itpl==itpl;
+  test-58: itpl ==itpl;
+  test-59: itpl== itpl;
+  test-60: itpl == itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/input.scss
new file mode 100644
index 0000000000..18ea78b9c2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10==10;
+  test-2: 10 ==10;
+  test-3: 10== 10;
+  test-4: 10 == 10;
+  test-5: 10==10%;
+  test-6: 10 ==10%;
+  test-7: 10== 10%;
+  test-8: 10 == 10%;
+  test-9: 10==10px;
+  test-10: 10 ==10px;
+  test-11: 10== 10px;
+  test-12: 10 == 10px;
+  test-13: 10==#AAA;
+  test-14: 10 ==#AAA;
+  test-15: 10== #AAA;
+  test-16: 10 == #AAA;
+  test-17: 10==#{itpl};
+  test-18: 10 ==#{itpl};
+  test-19: 10== #{itpl};
+  test-20: 10 == #{itpl};
+  test-21: 10%==10%;
+  test-22: 10% ==10%;
+  test-23: 10%== 10%;
+  test-24: 10% == 10%;
+  test-25: 10%==10px;
+  test-26: 10% ==10px;
+  test-27: 10%== 10px;
+  test-28: 10% == 10px;
+  test-29: 10%==#AAA;
+  test-30: 10% ==#AAA;
+  test-31: 10%== #AAA;
+  test-32: 10% == #AAA;
+  test-33: 10%==#{itpl};
+  test-34: 10% ==#{itpl};
+  test-35: 10%== #{itpl};
+  test-36: 10% == #{itpl};
+  test-37: 10px==10px;
+  test-38: 10px ==10px;
+  test-39: 10px== 10px;
+  test-40: 10px == 10px;
+  test-41: 10px==#AAA;
+  test-42: 10px ==#AAA;
+  test-43: 10px== #AAA;
+  test-44: 10px == #AAA;
+  test-45: 10px==#{itpl};
+  test-46: 10px ==#{itpl};
+  test-47: 10px== #{itpl};
+  test-48: 10px == #{itpl};
+  test-49: #AAA==#AAA;
+  test-50: #AAA ==#AAA;
+  test-51: #AAA== #AAA;
+  test-52: #AAA == #AAA;
+  test-53: #AAA==#{itpl};
+  test-54: #AAA ==#{itpl};
+  test-55: #AAA== #{itpl};
+  test-56: #AAA == #{itpl};
+  test-57: #{itpl}==#{itpl};
+  test-58: #{itpl} ==#{itpl};
+  test-59: #{itpl}== #{itpl};
+  test-60: #{itpl} == #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..4106ca3a9e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10==10==10;
+  test-2: 10 ==10 ==10;
+  test-3: 10== 10== 10;
+  test-4: 10 == 10 == 10;
+  test-5: 10==10==10%;
+  test-6: 10 ==10 ==10%;
+  test-7: 10== 10== 10%;
+  test-8: 10 == 10 == 10%;
+  test-9: 10==10==10px;
+  test-10: 10 ==10 ==10px;
+  test-11: 10== 10== 10px;
+  test-12: 10 == 10 == 10px;
+  test-13: 10==10==#AAA;
+  test-14: 10 ==10 ==#AAA;
+  test-15: 10== 10== #AAA;
+  test-16: 10 == 10 == #AAA;
+  test-17: 10==10==#{itpl};
+  test-18: 10 ==10 ==#{itpl};
+  test-19: 10== 10== #{itpl};
+  test-20: 10 == 10 == #{itpl};
+  test-21: 10==10%==10%;
+  test-22: 10 ==10% ==10%;
+  test-23: 10== 10%== 10%;
+  test-24: 10 == 10% == 10%;
+  test-25: 10==10%==10px;
+  test-26: 10 ==10% ==10px;
+  test-27: 10== 10%== 10px;
+  test-28: 10 == 10% == 10px;
+  test-29: 10==10%==#AAA;
+  test-30: 10 ==10% ==#AAA;
+  test-31: 10== 10%== #AAA;
+  test-32: 10 == 10% == #AAA;
+  test-33: 10==10%==#{itpl};
+  test-34: 10 ==10% ==#{itpl};
+  test-35: 10== 10%== #{itpl};
+  test-36: 10 == 10% == #{itpl};
+  test-37: 10==10px==10px;
+  test-38: 10 ==10px ==10px;
+  test-39: 10== 10px== 10px;
+  test-40: 10 == 10px == 10px;
+  test-41: 10==10px==#AAA;
+  test-42: 10 ==10px ==#AAA;
+  test-43: 10== 10px== #AAA;
+  test-44: 10 == 10px == #AAA;
+  test-45: 10==10px==#{itpl};
+  test-46: 10 ==10px ==#{itpl};
+  test-47: 10== 10px== #{itpl};
+  test-48: 10 == 10px == #{itpl};
+  test-49: 10==#AAA==#AAA;
+  test-50: 10 ==#AAA ==#AAA;
+  test-51: 10== #AAA== #AAA;
+  test-52: 10 == #AAA == #AAA;
+  test-53: 10==#AAA==#{itpl};
+  test-54: 10 ==#AAA ==#{itpl};
+  test-55: 10== #AAA== #{itpl};
+  test-56: 10 == #AAA == #{itpl};
+  test-57: 10==#{itpl}==#{itpl};
+  test-58: 10 ==#{itpl} ==#{itpl};
+  test-59: 10== #{itpl}== #{itpl};
+  test-60: 10 == #{itpl} == #{itpl};
+  test-61: 10%==10%==10%;
+  test-62: 10% ==10% ==10%;
+  test-63: 10%== 10%== 10%;
+  test-64: 10% == 10% == 10%;
+  test-65: 10%==10%==10px;
+  test-66: 10% ==10% ==10px;
+  test-67: 10%== 10%== 10px;
+  test-68: 10% == 10% == 10px;
+  test-69: 10%==10%==#AAA;
+  test-70: 10% ==10% ==#AAA;
+  test-71: 10%== 10%== #AAA;
+  test-72: 10% == 10% == #AAA;
+  test-73: 10%==10%==#{itpl};
+  test-74: 10% ==10% ==#{itpl};
+  test-75: 10%== 10%== #{itpl};
+  test-76: 10% == 10% == #{itpl};
+  test-77: 10%==10px==10px;
+  test-78: 10% ==10px ==10px;
+  test-79: 10%== 10px== 10px;
+  test-80: 10% == 10px == 10px;
+  test-81: 10%==10px==#AAA;
+  test-82: 10% ==10px ==#AAA;
+  test-83: 10%== 10px== #AAA;
+  test-84: 10% == 10px == #AAA;
+  test-85: 10%==10px==#{itpl};
+  test-86: 10% ==10px ==#{itpl};
+  test-87: 10%== 10px== #{itpl};
+  test-88: 10% == 10px == #{itpl};
+  test-89: 10%==#AAA==#AAA;
+  test-90: 10% ==#AAA ==#AAA;
+  test-91: 10%== #AAA== #AAA;
+  test-92: 10% == #AAA == #AAA;
+  test-93: 10%==#AAA==#{itpl};
+  test-94: 10% ==#AAA ==#{itpl};
+  test-95: 10%== #AAA== #{itpl};
+  test-96: 10% == #AAA == #{itpl};
+  test-97: 10%==#{itpl}==#{itpl};
+  test-98: 10% ==#{itpl} ==#{itpl};
+  test-99: 10%== #{itpl}== #{itpl};
+  test-100: 10% == #{itpl} == #{itpl};
+  test-101: 10px==10px==10px;
+  test-102: 10px ==10px ==10px;
+  test-103: 10px== 10px== 10px;
+  test-104: 10px == 10px == 10px;
+  test-105: 10px==10px==#AAA;
+  test-106: 10px ==10px ==#AAA;
+  test-107: 10px== 10px== #AAA;
+  test-108: 10px == 10px == #AAA;
+  test-109: 10px==10px==#{itpl};
+  test-110: 10px ==10px ==#{itpl};
+  test-111: 10px== 10px== #{itpl};
+  test-112: 10px == 10px == #{itpl};
+  test-113: 10px==#AAA==#AAA;
+  test-114: 10px ==#AAA ==#AAA;
+  test-115: 10px== #AAA== #AAA;
+  test-116: 10px == #AAA == #AAA;
+  test-117: 10px==#AAA==#{itpl};
+  test-118: 10px ==#AAA ==#{itpl};
+  test-119: 10px== #AAA== #{itpl};
+  test-120: 10px == #AAA == #{itpl};
+  test-121: 10px==#{itpl}==#{itpl};
+  test-122: 10px ==#{itpl} ==#{itpl};
+  test-123: 10px== #{itpl}== #{itpl};
+  test-124: 10px == #{itpl} == #{itpl};
+  test-125: #AAA==#AAA==#AAA;
+  test-126: #AAA ==#AAA ==#AAA;
+  test-127: #AAA== #AAA== #AAA;
+  test-128: #AAA == #AAA == #AAA;
+  test-129: #AAA==#AAA==#{itpl};
+  test-130: #AAA ==#AAA ==#{itpl};
+  test-131: #AAA== #AAA== #{itpl};
+  test-132: #AAA == #AAA == #{itpl};
+  test-133: #AAA==#{itpl}==#{itpl};
+  test-134: #AAA ==#{itpl} ==#{itpl};
+  test-135: #AAA== #{itpl}== #{itpl};
+  test-136: #AAA == #{itpl} == #{itpl};
+  test-137: #{itpl}==#{itpl}==#{itpl};
+  test-138: #{itpl} ==#{itpl} ==#{itpl};
+  test-139: #{itpl}== #{itpl}== #{itpl};
+  test-140: #{itpl} == #{itpl} == #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..922a69fc61
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: 10==10; test-6: 10 ==10; test-7: 10== 10; test-8: 10 == 10; test-9: false0; test-10: false0; test-11: false0; test-12: false0; test-13: 10==10; test-14: 10 ==10; test-15: 10== 10; test-16: 10 == 10; test-17: 10==10; test-18: 10 ==10; test-19: 10== 10; test-20: 10 == 10; test-21: 10==10; test-22: 10 ==10; test-23: 10== 10; test-24: 10 == 10; test-25: 10==10; test-26: 10 ==10; test-27: 10== 10; test-28: 10 == 10; test-29: 10==10; test-30: 10 ==10; test-31: 10== 10; test-32: 10 == 10; test-33: 10==10; test-34: 10 ==10; test-35: 10== 10; test-36: 10 == 10; test-37: 10==10; test-38: 10 ==10; test-39: 10== 10; test-40: 10 == 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..3bc6247b83
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:10==10;test-6:10 ==10;test-7:10== 10;test-8:10 == 10;test-9:false0;test-10:false0;test-11:false0;test-12:false0;test-13:10==10;test-14:10 ==10;test-15:10== 10;test-16:10 == 10;test-17:10==10;test-18:10 ==10;test-19:10== 10;test-20:10 == 10;test-21:10==10;test-22:10 ==10;test-23:10== 10;test-24:10 == 10;test-25:10==10;test-26:10 ==10;test-27:10== 10;test-28:10 == 10;test-29:10==10;test-30:10 ==10;test-31:10== 10;test-32:10 == 10;test-33:10==10;test-34:10 ==10;test-35:10== 10;test-36:10 == 10;test-37:10==10;test-38:10 ==10;test-39:10== 10;test-40:10 == 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..fde77b07af
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10==10;
+  test-6: 10 ==10;
+  test-7: 10== 10;
+  test-8: 10 == 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10==10;
+  test-14: 10 ==10;
+  test-15: 10== 10;
+  test-16: 10 == 10;
+  test-17: 10==10;
+  test-18: 10 ==10;
+  test-19: 10== 10;
+  test-20: 10 == 10;
+  test-21: 10==10;
+  test-22: 10 ==10;
+  test-23: 10== 10;
+  test-24: 10 == 10;
+  test-25: 10==10;
+  test-26: 10 ==10;
+  test-27: 10== 10;
+  test-28: 10 == 10;
+  test-29: 10==10;
+  test-30: 10 ==10;
+  test-31: 10== 10;
+  test-32: 10 == 10;
+  test-33: 10==10;
+  test-34: 10 ==10;
+  test-35: 10== 10;
+  test-36: 10 == 10;
+  test-37: 10==10;
+  test-38: 10 ==10;
+  test-39: 10== 10;
+  test-40: 10 == 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..ab8f57fb2c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10==10;
+  test-6: 10 ==10;
+  test-7: 10== 10;
+  test-8: 10 == 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10==10;
+  test-14: 10 ==10;
+  test-15: 10== 10;
+  test-16: 10 == 10;
+  test-17: 10==10;
+  test-18: 10 ==10;
+  test-19: 10== 10;
+  test-20: 10 == 10;
+  test-21: 10==10;
+  test-22: 10 ==10;
+  test-23: 10== 10;
+  test-24: 10 == 10;
+  test-25: 10==10;
+  test-26: 10 ==10;
+  test-27: 10== 10;
+  test-28: 10 == 10;
+  test-29: 10==10;
+  test-30: 10 ==10;
+  test-31: 10== 10;
+  test-32: 10 == 10;
+  test-33: 10==10;
+  test-34: 10 ==10;
+  test-35: 10== 10;
+  test-36: 10 == 10;
+  test-37: 10==10;
+  test-38: 10 ==10;
+  test-39: 10== 10;
+  test-40: 10 == 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/input.scss
new file mode 100644
index 0000000000..65639224a5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10==10;
+  test-2: 10 ==10;
+  test-3: 10== 10;
+  test-4: 10 == 10;
+  test-5: 10==#{10};
+  test-6: 10 ==#{10};
+  test-7: 10== #{10};
+  test-8: 10 == #{10};
+  test-9: 10==1#{0};
+  test-10: 10 ==1#{0};
+  test-11: 10== 1#{0};
+  test-12: 10 == 1#{0};
+  test-13: 10==#{1}0;
+  test-14: 10 ==#{1}0;
+  test-15: 10== #{1}0;
+  test-16: 10 == #{1}0;
+  test-17: #{10}==#{10};
+  test-18: #{10} ==#{10};
+  test-19: #{10}== #{10};
+  test-20: #{10} == #{10};
+  test-21: #{10}==1#{0};
+  test-22: #{10} ==1#{0};
+  test-23: #{10}== 1#{0};
+  test-24: #{10} == 1#{0};
+  test-25: #{10}==#{1}0;
+  test-26: #{10} ==#{1}0;
+  test-27: #{10}== #{1}0;
+  test-28: #{10} == #{1}0;
+  test-29: 1#{0}==1#{0};
+  test-30: 1#{0} ==1#{0};
+  test-31: 1#{0}== 1#{0};
+  test-32: 1#{0} == 1#{0};
+  test-33: 1#{0}==#{1}0;
+  test-34: 1#{0} ==#{1}0;
+  test-35: 1#{0}== #{1}0;
+  test-36: 1#{0} == #{1}0;
+  test-37: #{1}0==#{1}0;
+  test-38: #{1}0 ==#{1}0;
+  test-39: #{1}0== #{1}0;
+  test-40: #{1}0 == #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..3b2314e54d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10==10==10;
+  test-2: 10 ==10 ==10;
+  test-3: 10== 10== 10;
+  test-4: 10 == 10 == 10;
+  test-5: 10==10==#{10};
+  test-6: 10 ==10 ==#{10};
+  test-7: 10== 10== #{10};
+  test-8: 10 == 10 == #{10};
+  test-9: 10==10==1#{0};
+  test-10: 10 ==10 ==1#{0};
+  test-11: 10== 10== 1#{0};
+  test-12: 10 == 10 == 1#{0};
+  test-13: 10==10==#{1}0;
+  test-14: 10 ==10 ==#{1}0;
+  test-15: 10== 10== #{1}0;
+  test-16: 10 == 10 == #{1}0;
+  test-17: 10==#{10}==#{10};
+  test-18: 10 ==#{10} ==#{10};
+  test-19: 10== #{10}== #{10};
+  test-20: 10 == #{10} == #{10};
+  test-21: 10==#{10}==1#{0};
+  test-22: 10 ==#{10} ==1#{0};
+  test-23: 10== #{10}== 1#{0};
+  test-24: 10 == #{10} == 1#{0};
+  test-25: 10==#{10}==#{1}0;
+  test-26: 10 ==#{10} ==#{1}0;
+  test-27: 10== #{10}== #{1}0;
+  test-28: 10 == #{10} == #{1}0;
+  test-29: 10==1#{0}==1#{0};
+  test-30: 10 ==1#{0} ==1#{0};
+  test-31: 10== 1#{0}== 1#{0};
+  test-32: 10 == 1#{0} == 1#{0};
+  test-33: 10==1#{0}==#{1}0;
+  test-34: 10 ==1#{0} ==#{1}0;
+  test-35: 10== 1#{0}== #{1}0;
+  test-36: 10 == 1#{0} == #{1}0;
+  test-37: 10==#{1}0==#{1}0;
+  test-38: 10 ==#{1}0 ==#{1}0;
+  test-39: 10== #{1}0== #{1}0;
+  test-40: 10 == #{1}0 == #{1}0;
+  test-41: #{10}==#{10}==#{10};
+  test-42: #{10} ==#{10} ==#{10};
+  test-43: #{10}== #{10}== #{10};
+  test-44: #{10} == #{10} == #{10};
+  test-45: #{10}==#{10}==1#{0};
+  test-46: #{10} ==#{10} ==1#{0};
+  test-47: #{10}== #{10}== 1#{0};
+  test-48: #{10} == #{10} == 1#{0};
+  test-49: #{10}==#{10}==#{1}0;
+  test-50: #{10} ==#{10} ==#{1}0;
+  test-51: #{10}== #{10}== #{1}0;
+  test-52: #{10} == #{10} == #{1}0;
+  test-53: #{10}==1#{0}==1#{0};
+  test-54: #{10} ==1#{0} ==1#{0};
+  test-55: #{10}== 1#{0}== 1#{0};
+  test-56: #{10} == 1#{0} == 1#{0};
+  test-57: #{10}==1#{0}==#{1}0;
+  test-58: #{10} ==1#{0} ==#{1}0;
+  test-59: #{10}== 1#{0}== #{1}0;
+  test-60: #{10} == 1#{0} == #{1}0;
+  test-61: #{10}==#{1}0==#{1}0;
+  test-62: #{10} ==#{1}0 ==#{1}0;
+  test-63: #{10}== #{1}0== #{1}0;
+  test-64: #{10} == #{1}0 == #{1}0;
+  test-65: 1#{0}==1#{0}==1#{0};
+  test-66: 1#{0} ==1#{0} ==1#{0};
+  test-67: 1#{0}== 1#{0}== 1#{0};
+  test-68: 1#{0} == 1#{0} == 1#{0};
+  test-69: 1#{0}==1#{0}==#{1}0;
+  test-70: 1#{0} ==1#{0} ==#{1}0;
+  test-71: 1#{0}== 1#{0}== #{1}0;
+  test-72: 1#{0} == 1#{0} == #{1}0;
+  test-73: 1#{0}==#{1}0==#{1}0;
+  test-74: 1#{0} ==#{1}0 ==#{1}0;
+  test-75: 1#{0}== #{1}0== #{1}0;
+  test-76: 1#{0} == #{1}0 == #{1}0;
+  test-77: #{1}0==#{1}0==#{1}0;
+  test-78: #{1}0 ==#{1}0 ==#{1}0;
+  test-79: #{1}0== #{1}0== #{1}0;
+  test-80: #{1}0 == #{1}0 == #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..bdf3589746
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: false; test-6: false; test-7: false; test-8: false; test-9: literal==interpolant; test-10: literal ==interpolant; test-11: literal== interpolant; test-12: literal == interpolant; test-13: falseritlp; test-14: falseritlp; test-15: falseritlp; test-16: falseritlp; test-17: literal==litlp_rschema; test-18: literal ==litlp_rschema; test-19: literal== litlp_rschema; test-20: literal == litlp_rschema; test-21: true; test-22: true; test-23: true; test-24: true; test-25: "quoted"==interpolant; test-26: "quoted" ==interpolant; test-27: "quoted"== interpolant; test-28: "quoted" == interpolant; test-29: falseritlp; test-30: falseritlp; test-31: falseritlp; test-32: falseritlp; test-33: "quoted"==litlp_rschema; test-34: "quoted" ==litlp_rschema; test-35: "quoted"== litlp_rschema; test-36: "quoted" == litlp_rschema; test-37: interpolant==interpolant; test-38: interpolant ==interpolant; test-39: interpolant== interpolant; test-40: interpolant == interpolant; test-41: interpolant==lschema_ritlp; test-42: interpolant ==lschema_ritlp; test-43: interpolant== lschema_ritlp; test-44: interpolant == lschema_ritlp; test-45: interpolant==litlp_rschema; test-46: interpolant ==litlp_rschema; test-47: interpolant== litlp_rschema; test-48: interpolant == litlp_rschema; test-49: lschema_ritlp==lschema_ritlp; test-50: lschema_ritlp ==lschema_ritlp; test-51: lschema_ritlp== lschema_ritlp; test-52: lschema_ritlp == lschema_ritlp; test-53: lschema_ritlp==litlp_rschema; test-54: lschema_ritlp ==litlp_rschema; test-55: lschema_ritlp== litlp_rschema; test-56: lschema_ritlp == litlp_rschema; test-57: litlp_rschema==litlp_rschema; test-58: litlp_rschema ==litlp_rschema; test-59: litlp_rschema== litlp_rschema; test-60: litlp_rschema == litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..a0eb8f6a6c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:false;test-6:false;test-7:false;test-8:false;test-9:literal==interpolant;test-10:literal ==interpolant;test-11:literal== interpolant;test-12:literal == interpolant;test-13:falseritlp;test-14:falseritlp;test-15:falseritlp;test-16:falseritlp;test-17:literal==litlp_rschema;test-18:literal ==litlp_rschema;test-19:literal== litlp_rschema;test-20:literal == litlp_rschema;test-21:true;test-22:true;test-23:true;test-24:true;test-25:"quoted"==interpolant;test-26:"quoted" ==interpolant;test-27:"quoted"== interpolant;test-28:"quoted" == interpolant;test-29:falseritlp;test-30:falseritlp;test-31:falseritlp;test-32:falseritlp;test-33:"quoted"==litlp_rschema;test-34:"quoted" ==litlp_rschema;test-35:"quoted"== litlp_rschema;test-36:"quoted" == litlp_rschema;test-37:interpolant==interpolant;test-38:interpolant ==interpolant;test-39:interpolant== interpolant;test-40:interpolant == interpolant;test-41:interpolant==lschema_ritlp;test-42:interpolant ==lschema_ritlp;test-43:interpolant== lschema_ritlp;test-44:interpolant == lschema_ritlp;test-45:interpolant==litlp_rschema;test-46:interpolant ==litlp_rschema;test-47:interpolant== litlp_rschema;test-48:interpolant == litlp_rschema;test-49:lschema_ritlp==lschema_ritlp;test-50:lschema_ritlp ==lschema_ritlp;test-51:lschema_ritlp== lschema_ritlp;test-52:lschema_ritlp == lschema_ritlp;test-53:lschema_ritlp==litlp_rschema;test-54:lschema_ritlp ==litlp_rschema;test-55:lschema_ritlp== litlp_rschema;test-56:lschema_ritlp == litlp_rschema;test-57:litlp_rschema==litlp_rschema;test-58:litlp_rschema ==litlp_rschema;test-59:litlp_rschema== litlp_rschema;test-60:litlp_rschema == litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..a0fda6ecf1
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: literal==interpolant;
+  test-10: literal ==interpolant;
+  test-11: literal== interpolant;
+  test-12: literal == interpolant;
+  test-13: falseritlp;
+  test-14: falseritlp;
+  test-15: falseritlp;
+  test-16: falseritlp;
+  test-17: literal==litlp_rschema;
+  test-18: literal ==litlp_rschema;
+  test-19: literal== litlp_rschema;
+  test-20: literal == litlp_rschema;
+  test-21: true;
+  test-22: true;
+  test-23: true;
+  test-24: true;
+  test-25: "quoted"==interpolant;
+  test-26: "quoted" ==interpolant;
+  test-27: "quoted"== interpolant;
+  test-28: "quoted" == interpolant;
+  test-29: falseritlp;
+  test-30: falseritlp;
+  test-31: falseritlp;
+  test-32: falseritlp;
+  test-33: "quoted"==litlp_rschema;
+  test-34: "quoted" ==litlp_rschema;
+  test-35: "quoted"== litlp_rschema;
+  test-36: "quoted" == litlp_rschema;
+  test-37: interpolant==interpolant;
+  test-38: interpolant ==interpolant;
+  test-39: interpolant== interpolant;
+  test-40: interpolant == interpolant;
+  test-41: interpolant==lschema_ritlp;
+  test-42: interpolant ==lschema_ritlp;
+  test-43: interpolant== lschema_ritlp;
+  test-44: interpolant == lschema_ritlp;
+  test-45: interpolant==litlp_rschema;
+  test-46: interpolant ==litlp_rschema;
+  test-47: interpolant== litlp_rschema;
+  test-48: interpolant == litlp_rschema;
+  test-49: lschema_ritlp==lschema_ritlp;
+  test-50: lschema_ritlp ==lschema_ritlp;
+  test-51: lschema_ritlp== lschema_ritlp;
+  test-52: lschema_ritlp == lschema_ritlp;
+  test-53: lschema_ritlp==litlp_rschema;
+  test-54: lschema_ritlp ==litlp_rschema;
+  test-55: lschema_ritlp== litlp_rschema;
+  test-56: lschema_ritlp == litlp_rschema;
+  test-57: litlp_rschema==litlp_rschema;
+  test-58: litlp_rschema ==litlp_rschema;
+  test-59: litlp_rschema== litlp_rschema;
+  test-60: litlp_rschema == litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..38521a28f9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: literal==interpolant;
+  test-10: literal ==interpolant;
+  test-11: literal== interpolant;
+  test-12: literal == interpolant;
+  test-13: falseritlp;
+  test-14: falseritlp;
+  test-15: falseritlp;
+  test-16: falseritlp;
+  test-17: literal==litlp_rschema;
+  test-18: literal ==litlp_rschema;
+  test-19: literal== litlp_rschema;
+  test-20: literal == litlp_rschema;
+  test-21: true;
+  test-22: true;
+  test-23: true;
+  test-24: true;
+  test-25: "quoted"==interpolant;
+  test-26: "quoted" ==interpolant;
+  test-27: "quoted"== interpolant;
+  test-28: "quoted" == interpolant;
+  test-29: falseritlp;
+  test-30: falseritlp;
+  test-31: falseritlp;
+  test-32: falseritlp;
+  test-33: "quoted"==litlp_rschema;
+  test-34: "quoted" ==litlp_rschema;
+  test-35: "quoted"== litlp_rschema;
+  test-36: "quoted" == litlp_rschema;
+  test-37: interpolant==interpolant;
+  test-38: interpolant ==interpolant;
+  test-39: interpolant== interpolant;
+  test-40: interpolant == interpolant;
+  test-41: interpolant==lschema_ritlp;
+  test-42: interpolant ==lschema_ritlp;
+  test-43: interpolant== lschema_ritlp;
+  test-44: interpolant == lschema_ritlp;
+  test-45: interpolant==litlp_rschema;
+  test-46: interpolant ==litlp_rschema;
+  test-47: interpolant== litlp_rschema;
+  test-48: interpolant == litlp_rschema;
+  test-49: lschema_ritlp==lschema_ritlp;
+  test-50: lschema_ritlp ==lschema_ritlp;
+  test-51: lschema_ritlp== lschema_ritlp;
+  test-52: lschema_ritlp == lschema_ritlp;
+  test-53: lschema_ritlp==litlp_rschema;
+  test-54: lschema_ritlp ==litlp_rschema;
+  test-55: lschema_ritlp== litlp_rschema;
+  test-56: lschema_ritlp == litlp_rschema;
+  test-57: litlp_rschema==litlp_rschema;
+  test-58: litlp_rschema ==litlp_rschema;
+  test-59: litlp_rschema== litlp_rschema;
+  test-60: litlp_rschema == litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/input.scss
new file mode 100644
index 0000000000..3cb878c39f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal==literal;
+  test-2: literal ==literal;
+  test-3: literal== literal;
+  test-4: literal == literal;
+  test-5: literal=="quoted";
+  test-6: literal =="quoted";
+  test-7: literal== "quoted";
+  test-8: literal == "quoted";
+  test-9: literal==#{interpolant};
+  test-10: literal ==#{interpolant};
+  test-11: literal== #{interpolant};
+  test-12: literal == #{interpolant};
+  test-13: literal==lschema_#{ritlp};
+  test-14: literal ==lschema_#{ritlp};
+  test-15: literal== lschema_#{ritlp};
+  test-16: literal == lschema_#{ritlp};
+  test-17: literal==#{litlp}_rschema;
+  test-18: literal ==#{litlp}_rschema;
+  test-19: literal== #{litlp}_rschema;
+  test-20: literal == #{litlp}_rschema;
+  test-21: "quoted"=="quoted";
+  test-22: "quoted" =="quoted";
+  test-23: "quoted"== "quoted";
+  test-24: "quoted" == "quoted";
+  test-25: "quoted"==#{interpolant};
+  test-26: "quoted" ==#{interpolant};
+  test-27: "quoted"== #{interpolant};
+  test-28: "quoted" == #{interpolant};
+  test-29: "quoted"==lschema_#{ritlp};
+  test-30: "quoted" ==lschema_#{ritlp};
+  test-31: "quoted"== lschema_#{ritlp};
+  test-32: "quoted" == lschema_#{ritlp};
+  test-33: "quoted"==#{litlp}_rschema;
+  test-34: "quoted" ==#{litlp}_rschema;
+  test-35: "quoted"== #{litlp}_rschema;
+  test-36: "quoted" == #{litlp}_rschema;
+  test-37: #{interpolant}==#{interpolant};
+  test-38: #{interpolant} ==#{interpolant};
+  test-39: #{interpolant}== #{interpolant};
+  test-40: #{interpolant} == #{interpolant};
+  test-41: #{interpolant}==lschema_#{ritlp};
+  test-42: #{interpolant} ==lschema_#{ritlp};
+  test-43: #{interpolant}== lschema_#{ritlp};
+  test-44: #{interpolant} == lschema_#{ritlp};
+  test-45: #{interpolant}==#{litlp}_rschema;
+  test-46: #{interpolant} ==#{litlp}_rschema;
+  test-47: #{interpolant}== #{litlp}_rschema;
+  test-48: #{interpolant} == #{litlp}_rschema;
+  test-49: lschema_#{ritlp}==lschema_#{ritlp};
+  test-50: lschema_#{ritlp} ==lschema_#{ritlp};
+  test-51: lschema_#{ritlp}== lschema_#{ritlp};
+  test-52: lschema_#{ritlp} == lschema_#{ritlp};
+  test-53: lschema_#{ritlp}==#{litlp}_rschema;
+  test-54: lschema_#{ritlp} ==#{litlp}_rschema;
+  test-55: lschema_#{ritlp}== #{litlp}_rschema;
+  test-56: lschema_#{ritlp} == #{litlp}_rschema;
+  test-57: #{litlp}_rschema==#{litlp}_rschema;
+  test-58: #{litlp}_rschema ==#{litlp}_rschema;
+  test-59: #{litlp}_rschema== #{litlp}_rschema;
+  test-60: #{litlp}_rschema == #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_eq/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/tripplets/input.scss
new file mode 100644
index 0000000000..c808468656
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_eq/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal==literal==literal;
+  test-2: literal ==literal ==literal;
+  test-3: literal== literal== literal;
+  test-4: literal == literal == literal;
+  test-5: literal==literal=="quoted";
+  test-6: literal ==literal =="quoted";
+  test-7: literal== literal== "quoted";
+  test-8: literal == literal == "quoted";
+  test-9: literal==literal==#{interpolant};
+  test-10: literal ==literal ==#{interpolant};
+  test-11: literal== literal== #{interpolant};
+  test-12: literal == literal == #{interpolant};
+  test-13: literal==literal==lschema_#{ritlp};
+  test-14: literal ==literal ==lschema_#{ritlp};
+  test-15: literal== literal== lschema_#{ritlp};
+  test-16: literal == literal == lschema_#{ritlp};
+  test-17: literal==literal==#{litlp}_rschema;
+  test-18: literal ==literal ==#{litlp}_rschema;
+  test-19: literal== literal== #{litlp}_rschema;
+  test-20: literal == literal == #{litlp}_rschema;
+  test-21: literal=="quoted"=="quoted";
+  test-22: literal =="quoted" =="quoted";
+  test-23: literal== "quoted"== "quoted";
+  test-24: literal == "quoted" == "quoted";
+  test-25: literal=="quoted"==#{interpolant};
+  test-26: literal =="quoted" ==#{interpolant};
+  test-27: literal== "quoted"== #{interpolant};
+  test-28: literal == "quoted" == #{interpolant};
+  test-29: literal=="quoted"==lschema_#{ritlp};
+  test-30: literal =="quoted" ==lschema_#{ritlp};
+  test-31: literal== "quoted"== lschema_#{ritlp};
+  test-32: literal == "quoted" == lschema_#{ritlp};
+  test-33: literal=="quoted"==#{litlp}_rschema;
+  test-34: literal =="quoted" ==#{litlp}_rschema;
+  test-35: literal== "quoted"== #{litlp}_rschema;
+  test-36: literal == "quoted" == #{litlp}_rschema;
+  test-37: literal==#{interpolant}==#{interpolant};
+  test-38: literal ==#{interpolant} ==#{interpolant};
+  test-39: literal== #{interpolant}== #{interpolant};
+  test-40: literal == #{interpolant} == #{interpolant};
+  test-41: literal==#{interpolant}==lschema_#{ritlp};
+  test-42: literal ==#{interpolant} ==lschema_#{ritlp};
+  test-43: literal== #{interpolant}== lschema_#{ritlp};
+  test-44: literal == #{interpolant} == lschema_#{ritlp};
+  test-45: literal==#{interpolant}==#{litlp}_rschema;
+  test-46: literal ==#{interpolant} ==#{litlp}_rschema;
+  test-47: literal== #{interpolant}== #{litlp}_rschema;
+  test-48: literal == #{interpolant} == #{litlp}_rschema;
+  test-49: literal==lschema_#{ritlp}==lschema_#{ritlp};
+  test-50: literal ==lschema_#{ritlp} ==lschema_#{ritlp};
+  test-51: literal== lschema_#{ritlp}== lschema_#{ritlp};
+  test-52: literal == lschema_#{ritlp} == lschema_#{ritlp};
+  test-53: literal==lschema_#{ritlp}==#{litlp}_rschema;
+  test-54: literal ==lschema_#{ritlp} ==#{litlp}_rschema;
+  test-55: literal== lschema_#{ritlp}== #{litlp}_rschema;
+  test-56: literal == lschema_#{ritlp} == #{litlp}_rschema;
+  test-57: literal==#{litlp}_rschema==#{litlp}_rschema;
+  test-58: literal ==#{litlp}_rschema ==#{litlp}_rschema;
+  test-59: literal== #{litlp}_rschema== #{litlp}_rschema;
+  test-60: literal == #{litlp}_rschema == #{litlp}_rschema;
+  test-61: "quoted"=="quoted"=="quoted";
+  test-62: "quoted" =="quoted" =="quoted";
+  test-63: "quoted"== "quoted"== "quoted";
+  test-64: "quoted" == "quoted" == "quoted";
+  test-65: "quoted"=="quoted"==#{interpolant};
+  test-66: "quoted" =="quoted" ==#{interpolant};
+  test-67: "quoted"== "quoted"== #{interpolant};
+  test-68: "quoted" == "quoted" == #{interpolant};
+  test-69: "quoted"=="quoted"==lschema_#{ritlp};
+  test-70: "quoted" =="quoted" ==lschema_#{ritlp};
+  test-71: "quoted"== "quoted"== lschema_#{ritlp};
+  test-72: "quoted" == "quoted" == lschema_#{ritlp};
+  test-73: "quoted"=="quoted"==#{litlp}_rschema;
+  test-74: "quoted" =="quoted" ==#{litlp}_rschema;
+  test-75: "quoted"== "quoted"== #{litlp}_rschema;
+  test-76: "quoted" == "quoted" == #{litlp}_rschema;
+  test-77: "quoted"==#{interpolant}==#{interpolant};
+  test-78: "quoted" ==#{interpolant} ==#{interpolant};
+  test-79: "quoted"== #{interpolant}== #{interpolant};
+  test-80: "quoted" == #{interpolant} == #{interpolant};
+  test-81: "quoted"==#{interpolant}==lschema_#{ritlp};
+  test-82: "quoted" ==#{interpolant} ==lschema_#{ritlp};
+  test-83: "quoted"== #{interpolant}== lschema_#{ritlp};
+  test-84: "quoted" == #{interpolant} == lschema_#{ritlp};
+  test-85: "quoted"==#{interpolant}==#{litlp}_rschema;
+  test-86: "quoted" ==#{interpolant} ==#{litlp}_rschema;
+  test-87: "quoted"== #{interpolant}== #{litlp}_rschema;
+  test-88: "quoted" == #{interpolant} == #{litlp}_rschema;
+  test-89: "quoted"==lschema_#{ritlp}==lschema_#{ritlp};
+  test-90: "quoted" ==lschema_#{ritlp} ==lschema_#{ritlp};
+  test-91: "quoted"== lschema_#{ritlp}== lschema_#{ritlp};
+  test-92: "quoted" == lschema_#{ritlp} == lschema_#{ritlp};
+  test-93: "quoted"==lschema_#{ritlp}==#{litlp}_rschema;
+  test-94: "quoted" ==lschema_#{ritlp} ==#{litlp}_rschema;
+  test-95: "quoted"== lschema_#{ritlp}== #{litlp}_rschema;
+  test-96: "quoted" == lschema_#{ritlp} == #{litlp}_rschema;
+  test-97: "quoted"==#{litlp}_rschema==#{litlp}_rschema;
+  test-98: "quoted" ==#{litlp}_rschema ==#{litlp}_rschema;
+  test-99: "quoted"== #{litlp}_rschema== #{litlp}_rschema;
+  test-100: "quoted" == #{litlp}_rschema == #{litlp}_rschema;
+  test-101: #{interpolant}==#{interpolant}==#{interpolant};
+  test-102: #{interpolant} ==#{interpolant} ==#{interpolant};
+  test-103: #{interpolant}== #{interpolant}== #{interpolant};
+  test-104: #{interpolant} == #{interpolant} == #{interpolant};
+  test-105: #{interpolant}==#{interpolant}==lschema_#{ritlp};
+  test-106: #{interpolant} ==#{interpolant} ==lschema_#{ritlp};
+  test-107: #{interpolant}== #{interpolant}== lschema_#{ritlp};
+  test-108: #{interpolant} == #{interpolant} == lschema_#{ritlp};
+  test-109: #{interpolant}==#{interpolant}==#{litlp}_rschema;
+  test-110: #{interpolant} ==#{interpolant} ==#{litlp}_rschema;
+  test-111: #{interpolant}== #{interpolant}== #{litlp}_rschema;
+  test-112: #{interpolant} == #{interpolant} == #{litlp}_rschema;
+  test-113: #{interpolant}==lschema_#{ritlp}==lschema_#{ritlp};
+  test-114: #{interpolant} ==lschema_#{ritlp} ==lschema_#{ritlp};
+  test-115: #{interpolant}== lschema_#{ritlp}== lschema_#{ritlp};
+  test-116: #{interpolant} == lschema_#{ritlp} == lschema_#{ritlp};
+  test-117: #{interpolant}==lschema_#{ritlp}==#{litlp}_rschema;
+  test-118: #{interpolant} ==lschema_#{ritlp} ==#{litlp}_rschema;
+  test-119: #{interpolant}== lschema_#{ritlp}== #{litlp}_rschema;
+  test-120: #{interpolant} == lschema_#{ritlp} == #{litlp}_rschema;
+  test-121: #{interpolant}==#{litlp}_rschema==#{litlp}_rschema;
+  test-122: #{interpolant} ==#{litlp}_rschema ==#{litlp}_rschema;
+  test-123: #{interpolant}== #{litlp}_rschema== #{litlp}_rschema;
+  test-124: #{interpolant} == #{litlp}_rschema == #{litlp}_rschema;
+  test-125: lschema_#{ritlp}==lschema_#{ritlp}==lschema_#{ritlp};
+  test-126: lschema_#{ritlp} ==lschema_#{ritlp} ==lschema_#{ritlp};
+  test-127: lschema_#{ritlp}== lschema_#{ritlp}== lschema_#{ritlp};
+  test-128: lschema_#{ritlp} == lschema_#{ritlp} == lschema_#{ritlp};
+  test-129: lschema_#{ritlp}==lschema_#{ritlp}==#{litlp}_rschema;
+  test-130: lschema_#{ritlp} ==lschema_#{ritlp} ==#{litlp}_rschema;
+  test-131: lschema_#{ritlp}== lschema_#{ritlp}== #{litlp}_rschema;
+  test-132: lschema_#{ritlp} == lschema_#{ritlp} == #{litlp}_rschema;
+  test-133: lschema_#{ritlp}==#{litlp}_rschema==#{litlp}_rschema;
+  test-134: lschema_#{ritlp} ==#{litlp}_rschema ==#{litlp}_rschema;
+  test-135: lschema_#{ritlp}== #{litlp}_rschema== #{litlp}_rschema;
+  test-136: lschema_#{ritlp} == #{litlp}_rschema == #{litlp}_rschema;
+  test-137: #{litlp}_rschema==#{litlp}_rschema==#{litlp}_rschema;
+  test-138: #{litlp}_rschema ==#{litlp}_rschema ==#{litlp}_rschema;
+  test-139: #{litlp}_rschema== #{litlp}_rschema== #{litlp}_rschema;
+  test-140: #{litlp}_rschema == #{litlp}_rschema == #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/error
new file mode 100644
index 0000000000..6e6113a273
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "px gte 1".
+        on line 50 of /sass/sass-spec/spec/parser/operations/logic_ge/dimensions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..dec8c7160e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10>=10;
+  test-2: 10 >=10;
+  test-3: 10>= 10;
+  test-4: 10 >= 10;
+  test-5: 10>=10px;
+  test-6: 10 >=10px;
+  test-7: 10>= 10px;
+  test-8: 10 >= 10px;
+  test-9: 10>=#{10}px;
+  test-10: 10 >=#{10}px;
+  test-11: 10>= #{10}px;
+  test-12: 10 >= #{10}px;
+  test-13: 10>=1#{0}px;
+  test-14: 10 >=1#{0}px;
+  test-15: 10>= 1#{0}px;
+  test-16: 10 >= 1#{0}px;
+  test-17: 10>=10#{px};
+  test-18: 10 >=10#{px};
+  test-19: 10>= 10#{px};
+  test-20: 10 >= 10#{px};
+  test-21: 10>=10#{p}x;
+  test-22: 10 >=10#{p}x;
+  test-23: 10>= 10#{p}x;
+  test-24: 10 >= 10#{p}x;
+  test-25: 10px>=10px;
+  test-26: 10px >=10px;
+  test-27: 10px>= 10px;
+  test-28: 10px >= 10px;
+  test-29: 10px>=#{10}px;
+  test-30: 10px >=#{10}px;
+  test-31: 10px>= #{10}px;
+  test-32: 10px >= #{10}px;
+  test-33: 10px>=1#{0}px;
+  test-34: 10px >=1#{0}px;
+  test-35: 10px>= 1#{0}px;
+  test-36: 10px >= 1#{0}px;
+  test-37: 10px>=10#{px};
+  test-38: 10px >=10#{px};
+  test-39: 10px>= 10#{px};
+  test-40: 10px >= 10#{px};
+  test-41: 10px>=10#{p}x;
+  test-42: 10px >=10#{p}x;
+  test-43: 10px>= 10#{p}x;
+  test-44: 10px >= 10#{p}x;
+  test-45: #{10}px>=#{10}px;
+  test-46: #{10}px >=#{10}px;
+  test-47: #{10}px>= #{10}px;
+  test-48: #{10}px >= #{10}px;
+  test-49: #{10}px>=1#{0}px;
+  test-50: #{10}px >=1#{0}px;
+  test-51: #{10}px>= 1#{0}px;
+  test-52: #{10}px >= 1#{0}px;
+  test-53: #{10}px>=10#{px};
+  test-54: #{10}px >=10#{px};
+  test-55: #{10}px>= 10#{px};
+  test-56: #{10}px >= 10#{px};
+  test-57: #{10}px>=10#{p}x;
+  test-58: #{10}px >=10#{p}x;
+  test-59: #{10}px>= 10#{p}x;
+  test-60: #{10}px >= 10#{p}x;
+  test-61: 1#{0}px>=1#{0}px;
+  test-62: 1#{0}px >=1#{0}px;
+  test-63: 1#{0}px>= 1#{0}px;
+  test-64: 1#{0}px >= 1#{0}px;
+  test-65: 1#{0}px>=10#{px};
+  test-66: 1#{0}px >=10#{px};
+  test-67: 1#{0}px>= 10#{px};
+  test-68: 1#{0}px >= 10#{px};
+  test-69: 1#{0}px>=10#{p}x;
+  test-70: 1#{0}px >=10#{p}x;
+  test-71: 1#{0}px>= 10#{p}x;
+  test-72: 1#{0}px >= 10#{p}x;
+  test-73: 10#{px}>=10#{px};
+  test-74: 10#{px} >=10#{px};
+  test-75: 10#{px}>= 10#{px};
+  test-76: 10#{px} >= 10#{px};
+  test-77: 10#{px}>=10#{p}x;
+  test-78: 10#{px} >=10#{p}x;
+  test-79: 10#{px}>= 10#{p}x;
+  test-80: 10#{px} >= 10#{p}x;
+  test-81: 10#{p}x>=10#{p}x;
+  test-82: 10#{p}x >=10#{p}x;
+  test-83: 10#{p}x>= 10#{p}x;
+  test-84: 10#{p}x >= 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/dimensions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/error
new file mode 100644
index 0000000000..e92ada6f98
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25>=#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_ge/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/input.scss
new file mode 100644
index 0000000000..93a5e1a9f8
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25>=.25;
+  test-2: .25 >=.25;
+  test-3: .25>= .25;
+  test-4: .25 >= .25;
+  test-5: .25>=-.25;
+  test-6: .25 >=-.25;
+  test-7: .25>= -.25;
+  test-8: .25 >= -.25;
+  test-9: .25>=#{.25};
+  test-10: .25 >=#{.25};
+  test-11: .25>= #{.25};
+  test-12: .25 >= #{.25};
+  test-13: .25>=#{-.25};
+  test-14: .25 >=#{-.25};
+  test-15: .25>= #{-.25};
+  test-16: .25 >= #{-.25};
+  test-17: .25>=#{.}25;
+  test-18: .25 >=#{.}25;
+  test-19: .25>= #{.}25;
+  test-20: .25 >= #{.}25;
+  test-21: -.25>=-.25;
+  test-22: -.25 >=-.25;
+  test-23: -.25>= -.25;
+  test-24: -.25 >= -.25;
+  test-25: -.25>=#{.25};
+  test-26: -.25 >=#{.25};
+  test-27: -.25>= #{.25};
+  test-28: -.25 >= #{.25};
+  test-29: -.25>=#{-.25};
+  test-30: -.25 >=#{-.25};
+  test-31: -.25>= #{-.25};
+  test-32: -.25 >= #{-.25};
+  test-33: -.25>=#{.}25;
+  test-34: -.25 >=#{.}25;
+  test-35: -.25>= #{.}25;
+  test-36: -.25 >= #{.}25;
+  test-37: #{.25}>=#{.25};
+  test-38: #{.25} >=#{.25};
+  test-39: #{.25}>= #{.25};
+  test-40: #{.25} >= #{.25};
+  test-41: #{.25}>=#{-.25};
+  test-42: #{.25} >=#{-.25};
+  test-43: #{.25}>= #{-.25};
+  test-44: #{.25} >= #{-.25};
+  test-45: #{.25}>=#{.}25;
+  test-46: #{.25} >=#{.}25;
+  test-47: #{.25}>= #{.}25;
+  test-48: #{.25} >= #{.}25;
+  test-49: #{-.25}>=#{-.25};
+  test-50: #{-.25} >=#{-.25};
+  test-51: #{-.25}>= #{-.25};
+  test-52: #{-.25} >= #{-.25};
+  test-53: #{-.25}>=#{.}25;
+  test-54: #{-.25} >=#{.}25;
+  test-55: #{-.25}>= #{.}25;
+  test-56: #{-.25} >= #{.}25;
+  test-57: #{.}25>=#{.}25;
+  test-58: #{.}25 >=#{.}25;
+  test-59: #{.}25>= #{.}25;
+  test-60: #{.}25 >= #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/fractions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/error
new file mode 100644
index 0000000000..064364ad9b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "10 gte #AAA".
+        on line 14 of /sass/sass-spec/spec/parser/operations/logic_ge/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/input.scss
new file mode 100644
index 0000000000..324887abae
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10>=10;
+  test-2: 10 >=10;
+  test-3: 10>= 10;
+  test-4: 10 >= 10;
+  test-5: 10>=10%;
+  test-6: 10 >=10%;
+  test-7: 10>= 10%;
+  test-8: 10 >= 10%;
+  test-9: 10>=10px;
+  test-10: 10 >=10px;
+  test-11: 10>= 10px;
+  test-12: 10 >= 10px;
+  test-13: 10>=#AAA;
+  test-14: 10 >=#AAA;
+  test-15: 10>= #AAA;
+  test-16: 10 >= #AAA;
+  test-17: 10>=#{itpl};
+  test-18: 10 >=#{itpl};
+  test-19: 10>= #{itpl};
+  test-20: 10 >= #{itpl};
+  test-21: 10%>=10%;
+  test-22: 10% >=10%;
+  test-23: 10%>= 10%;
+  test-24: 10% >= 10%;
+  test-25: 10%>=10px;
+  test-26: 10% >=10px;
+  test-27: 10%>= 10px;
+  test-28: 10% >= 10px;
+  test-29: 10%>=#AAA;
+  test-30: 10% >=#AAA;
+  test-31: 10%>= #AAA;
+  test-32: 10% >= #AAA;
+  test-33: 10%>=#{itpl};
+  test-34: 10% >=#{itpl};
+  test-35: 10%>= #{itpl};
+  test-36: 10% >= #{itpl};
+  test-37: 10px>=10px;
+  test-38: 10px >=10px;
+  test-39: 10px>= 10px;
+  test-40: 10px >= 10px;
+  test-41: 10px>=#AAA;
+  test-42: 10px >=#AAA;
+  test-43: 10px>= #AAA;
+  test-44: 10px >= #AAA;
+  test-45: 10px>=#{itpl};
+  test-46: 10px >=#{itpl};
+  test-47: 10px>= #{itpl};
+  test-48: 10px >= #{itpl};
+  test-49: #AAA>=#AAA;
+  test-50: #AAA >=#AAA;
+  test-51: #AAA>= #AAA;
+  test-52: #AAA >= #AAA;
+  test-53: #AAA>=#{itpl};
+  test-54: #AAA >=#{itpl};
+  test-55: #AAA>= #{itpl};
+  test-56: #AAA >= #{itpl};
+  test-57: #{itpl}>=#{itpl};
+  test-58: #{itpl} >=#{itpl};
+  test-59: #{itpl}>= #{itpl};
+  test-60: #{itpl} >= #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/mixed/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..ee21787b03
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: 10>=10; test-6: 10 >=10; test-7: 10>= 10; test-8: 10 >= 10; test-9: true0; test-10: true0; test-11: true0; test-12: true0; test-13: 10>=10; test-14: 10 >=10; test-15: 10>= 10; test-16: 10 >= 10; test-17: 10>=10; test-18: 10 >=10; test-19: 10>= 10; test-20: 10 >= 10; test-21: 10>=10; test-22: 10 >=10; test-23: 10>= 10; test-24: 10 >= 10; test-25: 10>=10; test-26: 10 >=10; test-27: 10>= 10; test-28: 10 >= 10; test-29: 10>=10; test-30: 10 >=10; test-31: 10>= 10; test-32: 10 >= 10; test-33: 10>=10; test-34: 10 >=10; test-35: 10>= 10; test-36: 10 >= 10; test-37: 10>=10; test-38: 10 >=10; test-39: 10>= 10; test-40: 10 >= 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..fdb9627ba2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:10>=10;test-6:10 >=10;test-7:10>= 10;test-8:10 >= 10;test-9:true0;test-10:true0;test-11:true0;test-12:true0;test-13:10>=10;test-14:10 >=10;test-15:10>= 10;test-16:10 >= 10;test-17:10>=10;test-18:10 >=10;test-19:10>= 10;test-20:10 >= 10;test-21:10>=10;test-22:10 >=10;test-23:10>= 10;test-24:10 >= 10;test-25:10>=10;test-26:10 >=10;test-27:10>= 10;test-28:10 >= 10;test-29:10>=10;test-30:10 >=10;test-31:10>= 10;test-32:10 >= 10;test-33:10>=10;test-34:10 >=10;test-35:10>= 10;test-36:10 >= 10;test-37:10>=10;test-38:10 >=10;test-39:10>= 10;test-40:10 >= 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..8e6b74f89f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10>=10;
+  test-6: 10 >=10;
+  test-7: 10>= 10;
+  test-8: 10 >= 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10>=10;
+  test-14: 10 >=10;
+  test-15: 10>= 10;
+  test-16: 10 >= 10;
+  test-17: 10>=10;
+  test-18: 10 >=10;
+  test-19: 10>= 10;
+  test-20: 10 >= 10;
+  test-21: 10>=10;
+  test-22: 10 >=10;
+  test-23: 10>= 10;
+  test-24: 10 >= 10;
+  test-25: 10>=10;
+  test-26: 10 >=10;
+  test-27: 10>= 10;
+  test-28: 10 >= 10;
+  test-29: 10>=10;
+  test-30: 10 >=10;
+  test-31: 10>= 10;
+  test-32: 10 >= 10;
+  test-33: 10>=10;
+  test-34: 10 >=10;
+  test-35: 10>= 10;
+  test-36: 10 >= 10;
+  test-37: 10>=10;
+  test-38: 10 >=10;
+  test-39: 10>= 10;
+  test-40: 10 >= 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..83ba6eacd4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10>=10;
+  test-6: 10 >=10;
+  test-7: 10>= 10;
+  test-8: 10 >= 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10>=10;
+  test-14: 10 >=10;
+  test-15: 10>= 10;
+  test-16: 10 >= 10;
+  test-17: 10>=10;
+  test-18: 10 >=10;
+  test-19: 10>= 10;
+  test-20: 10 >= 10;
+  test-21: 10>=10;
+  test-22: 10 >=10;
+  test-23: 10>= 10;
+  test-24: 10 >= 10;
+  test-25: 10>=10;
+  test-26: 10 >=10;
+  test-27: 10>= 10;
+  test-28: 10 >= 10;
+  test-29: 10>=10;
+  test-30: 10 >=10;
+  test-31: 10>= 10;
+  test-32: 10 >= 10;
+  test-33: 10>=10;
+  test-34: 10 >=10;
+  test-35: 10>= 10;
+  test-36: 10 >= 10;
+  test-37: 10>=10;
+  test-38: 10 >=10;
+  test-39: 10>= 10;
+  test-40: 10 >= 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/input.scss
new file mode 100644
index 0000000000..97963ead8c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10>=10;
+  test-2: 10 >=10;
+  test-3: 10>= 10;
+  test-4: 10 >= 10;
+  test-5: 10>=#{10};
+  test-6: 10 >=#{10};
+  test-7: 10>= #{10};
+  test-8: 10 >= #{10};
+  test-9: 10>=1#{0};
+  test-10: 10 >=1#{0};
+  test-11: 10>= 1#{0};
+  test-12: 10 >= 1#{0};
+  test-13: 10>=#{1}0;
+  test-14: 10 >=#{1}0;
+  test-15: 10>= #{1}0;
+  test-16: 10 >= #{1}0;
+  test-17: #{10}>=#{10};
+  test-18: #{10} >=#{10};
+  test-19: #{10}>= #{10};
+  test-20: #{10} >= #{10};
+  test-21: #{10}>=1#{0};
+  test-22: #{10} >=1#{0};
+  test-23: #{10}>= 1#{0};
+  test-24: #{10} >= 1#{0};
+  test-25: #{10}>=#{1}0;
+  test-26: #{10} >=#{1}0;
+  test-27: #{10}>= #{1}0;
+  test-28: #{10} >= #{1}0;
+  test-29: 1#{0}>=1#{0};
+  test-30: 1#{0} >=1#{0};
+  test-31: 1#{0}>= 1#{0};
+  test-32: 1#{0} >= 1#{0};
+  test-33: 1#{0}>=#{1}0;
+  test-34: 1#{0} >=#{1}0;
+  test-35: 1#{0}>= #{1}0;
+  test-36: 1#{0} >= #{1}0;
+  test-37: #{1}0>=#{1}0;
+  test-38: #{1}0 >=#{1}0;
+  test-39: #{1}0>= #{1}0;
+  test-40: #{1}0 >= #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/numbers/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..4c8f267bad
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant>=interpolant; test-38: interpolant >=interpolant; test-39: interpolant>= interpolant; test-40: interpolant >= interpolant; test-41: interpolant>=lschema_ritlp; test-42: interpolant >=lschema_ritlp; test-43: interpolant>= lschema_ritlp; test-44: interpolant >= lschema_ritlp; test-45: interpolant>=litlp_rschema; test-46: interpolant >=litlp_rschema; test-47: interpolant>= litlp_rschema; test-48: interpolant >= litlp_rschema; test-49: lschema_ritlp>=lschema_ritlp; test-50: lschema_ritlp >=lschema_ritlp; test-51: lschema_ritlp>= lschema_ritlp; test-52: lschema_ritlp >= lschema_ritlp; test-53: lschema_ritlp>=litlp_rschema; test-54: lschema_ritlp >=litlp_rschema; test-55: lschema_ritlp>= litlp_rschema; test-56: lschema_ritlp >= litlp_rschema; test-57: litlp_rschema>=litlp_rschema; test-58: litlp_rschema >=litlp_rschema; test-59: litlp_rschema>= litlp_rschema; test-60: litlp_rschema >= litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..6238ea3d32
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant>=interpolant;test-38:interpolant >=interpolant;test-39:interpolant>= interpolant;test-40:interpolant >= interpolant;test-41:interpolant>=lschema_ritlp;test-42:interpolant >=lschema_ritlp;test-43:interpolant>= lschema_ritlp;test-44:interpolant >= lschema_ritlp;test-45:interpolant>=litlp_rschema;test-46:interpolant >=litlp_rschema;test-47:interpolant>= litlp_rschema;test-48:interpolant >= litlp_rschema;test-49:lschema_ritlp>=lschema_ritlp;test-50:lschema_ritlp >=lschema_ritlp;test-51:lschema_ritlp>= lschema_ritlp;test-52:lschema_ritlp >= lschema_ritlp;test-53:lschema_ritlp>=litlp_rschema;test-54:lschema_ritlp >=litlp_rschema;test-55:lschema_ritlp>= litlp_rschema;test-56:lschema_ritlp >= litlp_rschema;test-57:litlp_rschema>=litlp_rschema;test-58:litlp_rschema >=litlp_rschema;test-59:litlp_rschema>= litlp_rschema;test-60:litlp_rschema >= litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..ef453ece2b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant>=interpolant;
+  test-38: interpolant >=interpolant;
+  test-39: interpolant>= interpolant;
+  test-40: interpolant >= interpolant;
+  test-41: interpolant>=lschema_ritlp;
+  test-42: interpolant >=lschema_ritlp;
+  test-43: interpolant>= lschema_ritlp;
+  test-44: interpolant >= lschema_ritlp;
+  test-45: interpolant>=litlp_rschema;
+  test-46: interpolant >=litlp_rschema;
+  test-47: interpolant>= litlp_rschema;
+  test-48: interpolant >= litlp_rschema;
+  test-49: lschema_ritlp>=lschema_ritlp;
+  test-50: lschema_ritlp >=lschema_ritlp;
+  test-51: lschema_ritlp>= lschema_ritlp;
+  test-52: lschema_ritlp >= lschema_ritlp;
+  test-53: lschema_ritlp>=litlp_rschema;
+  test-54: lschema_ritlp >=litlp_rschema;
+  test-55: lschema_ritlp>= litlp_rschema;
+  test-56: lschema_ritlp >= litlp_rschema;
+  test-57: litlp_rschema>=litlp_rschema;
+  test-58: litlp_rschema >=litlp_rschema;
+  test-59: litlp_rschema>= litlp_rschema;
+  test-60: litlp_rschema >= litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..85643bdd7e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant>=interpolant;
+  test-38: interpolant >=interpolant;
+  test-39: interpolant>= interpolant;
+  test-40: interpolant >= interpolant;
+  test-41: interpolant>=lschema_ritlp;
+  test-42: interpolant >=lschema_ritlp;
+  test-43: interpolant>= lschema_ritlp;
+  test-44: interpolant >= lschema_ritlp;
+  test-45: interpolant>=litlp_rschema;
+  test-46: interpolant >=litlp_rschema;
+  test-47: interpolant>= litlp_rschema;
+  test-48: interpolant >= litlp_rschema;
+  test-49: lschema_ritlp>=lschema_ritlp;
+  test-50: lschema_ritlp >=lschema_ritlp;
+  test-51: lschema_ritlp>= lschema_ritlp;
+  test-52: lschema_ritlp >= lschema_ritlp;
+  test-53: lschema_ritlp>=litlp_rschema;
+  test-54: lschema_ritlp >=litlp_rschema;
+  test-55: lschema_ritlp>= litlp_rschema;
+  test-56: lschema_ritlp >= litlp_rschema;
+  test-57: litlp_rschema>=litlp_rschema;
+  test-58: litlp_rschema >=litlp_rschema;
+  test-59: litlp_rschema>= litlp_rschema;
+  test-60: litlp_rschema >= litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/input.scss
new file mode 100644
index 0000000000..0885f041fb
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}>=#{interpolant};
+  test-38: #{interpolant} >=#{interpolant};
+  test-39: #{interpolant}>= #{interpolant};
+  test-40: #{interpolant} >= #{interpolant};
+  test-41: #{interpolant}>=lschema_#{ritlp};
+  test-42: #{interpolant} >=lschema_#{ritlp};
+  test-43: #{interpolant}>= lschema_#{ritlp};
+  test-44: #{interpolant} >= lschema_#{ritlp};
+  test-45: #{interpolant}>=#{litlp}_rschema;
+  test-46: #{interpolant} >=#{litlp}_rschema;
+  test-47: #{interpolant}>= #{litlp}_rschema;
+  test-48: #{interpolant} >= #{litlp}_rschema;
+  test-49: lschema_#{ritlp}>=lschema_#{ritlp};
+  test-50: lschema_#{ritlp} >=lschema_#{ritlp};
+  test-51: lschema_#{ritlp}>= lschema_#{ritlp};
+  test-52: lschema_#{ritlp} >= lschema_#{ritlp};
+  test-53: lschema_#{ritlp}>=#{litlp}_rschema;
+  test-54: lschema_#{ritlp} >=#{litlp}_rschema;
+  test-55: lschema_#{ritlp}>= #{litlp}_rschema;
+  test-56: lschema_#{ritlp} >= #{litlp}_rschema;
+  test-57: #{litlp}_rschema>=#{litlp}_rschema;
+  test-58: #{litlp}_rschema >=#{litlp}_rschema;
+  test-59: #{litlp}_rschema>= #{litlp}_rschema;
+  test-60: #{litlp}_rschema >= #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ge/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ge/strings/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/error
new file mode 100644
index 0000000000..c50ab8ca87
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "px gt 1".
+        on line 50 of /sass/sass-spec/spec/parser/operations/logic_gt/dimensions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..69367243f5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10>10;
+  test-2: 10 >10;
+  test-3: 10> 10;
+  test-4: 10 > 10;
+  test-5: 10>10px;
+  test-6: 10 >10px;
+  test-7: 10> 10px;
+  test-8: 10 > 10px;
+  test-9: 10>#{10}px;
+  test-10: 10 >#{10}px;
+  test-11: 10> #{10}px;
+  test-12: 10 > #{10}px;
+  test-13: 10>1#{0}px;
+  test-14: 10 >1#{0}px;
+  test-15: 10> 1#{0}px;
+  test-16: 10 > 1#{0}px;
+  test-17: 10>10#{px};
+  test-18: 10 >10#{px};
+  test-19: 10> 10#{px};
+  test-20: 10 > 10#{px};
+  test-21: 10>10#{p}x;
+  test-22: 10 >10#{p}x;
+  test-23: 10> 10#{p}x;
+  test-24: 10 > 10#{p}x;
+  test-25: 10px>10px;
+  test-26: 10px >10px;
+  test-27: 10px> 10px;
+  test-28: 10px > 10px;
+  test-29: 10px>#{10}px;
+  test-30: 10px >#{10}px;
+  test-31: 10px> #{10}px;
+  test-32: 10px > #{10}px;
+  test-33: 10px>1#{0}px;
+  test-34: 10px >1#{0}px;
+  test-35: 10px> 1#{0}px;
+  test-36: 10px > 1#{0}px;
+  test-37: 10px>10#{px};
+  test-38: 10px >10#{px};
+  test-39: 10px> 10#{px};
+  test-40: 10px > 10#{px};
+  test-41: 10px>10#{p}x;
+  test-42: 10px >10#{p}x;
+  test-43: 10px> 10#{p}x;
+  test-44: 10px > 10#{p}x;
+  test-45: #{10}px>#{10}px;
+  test-46: #{10}px >#{10}px;
+  test-47: #{10}px> #{10}px;
+  test-48: #{10}px > #{10}px;
+  test-49: #{10}px>1#{0}px;
+  test-50: #{10}px >1#{0}px;
+  test-51: #{10}px> 1#{0}px;
+  test-52: #{10}px > 1#{0}px;
+  test-53: #{10}px>10#{px};
+  test-54: #{10}px >10#{px};
+  test-55: #{10}px> 10#{px};
+  test-56: #{10}px > 10#{px};
+  test-57: #{10}px>10#{p}x;
+  test-58: #{10}px >10#{p}x;
+  test-59: #{10}px> 10#{p}x;
+  test-60: #{10}px > 10#{p}x;
+  test-61: 1#{0}px>1#{0}px;
+  test-62: 1#{0}px >1#{0}px;
+  test-63: 1#{0}px> 1#{0}px;
+  test-64: 1#{0}px > 1#{0}px;
+  test-65: 1#{0}px>10#{px};
+  test-66: 1#{0}px >10#{px};
+  test-67: 1#{0}px> 10#{px};
+  test-68: 1#{0}px > 10#{px};
+  test-69: 1#{0}px>10#{p}x;
+  test-70: 1#{0}px >10#{p}x;
+  test-71: 1#{0}px> 10#{p}x;
+  test-72: 1#{0}px > 10#{p}x;
+  test-73: 10#{px}>10#{px};
+  test-74: 10#{px} >10#{px};
+  test-75: 10#{px}> 10#{px};
+  test-76: 10#{px} > 10#{px};
+  test-77: 10#{px}>10#{p}x;
+  test-78: 10#{px} >10#{p}x;
+  test-79: 10#{px}> 10#{p}x;
+  test-80: 10#{px} > 10#{p}x;
+  test-81: 10#{p}x>10#{p}x;
+  test-82: 10#{p}x >10#{p}x;
+  test-83: 10#{p}x> 10#{p}x;
+  test-84: 10#{p}x > 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/dimensions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/error
new file mode 100644
index 0000000000..34b9a27ddc
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25>#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_gt/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/input.scss
new file mode 100644
index 0000000000..c858bb8f1d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25>.25;
+  test-2: .25 >.25;
+  test-3: .25> .25;
+  test-4: .25 > .25;
+  test-5: .25>-.25;
+  test-6: .25 >-.25;
+  test-7: .25> -.25;
+  test-8: .25 > -.25;
+  test-9: .25>#{.25};
+  test-10: .25 >#{.25};
+  test-11: .25> #{.25};
+  test-12: .25 > #{.25};
+  test-13: .25>#{-.25};
+  test-14: .25 >#{-.25};
+  test-15: .25> #{-.25};
+  test-16: .25 > #{-.25};
+  test-17: .25>#{.}25;
+  test-18: .25 >#{.}25;
+  test-19: .25> #{.}25;
+  test-20: .25 > #{.}25;
+  test-21: -.25>-.25;
+  test-22: -.25 >-.25;
+  test-23: -.25> -.25;
+  test-24: -.25 > -.25;
+  test-25: -.25>#{.25};
+  test-26: -.25 >#{.25};
+  test-27: -.25> #{.25};
+  test-28: -.25 > #{.25};
+  test-29: -.25>#{-.25};
+  test-30: -.25 >#{-.25};
+  test-31: -.25> #{-.25};
+  test-32: -.25 > #{-.25};
+  test-33: -.25>#{.}25;
+  test-34: -.25 >#{.}25;
+  test-35: -.25> #{.}25;
+  test-36: -.25 > #{.}25;
+  test-37: #{.25}>#{.25};
+  test-38: #{.25} >#{.25};
+  test-39: #{.25}> #{.25};
+  test-40: #{.25} > #{.25};
+  test-41: #{.25}>#{-.25};
+  test-42: #{.25} >#{-.25};
+  test-43: #{.25}> #{-.25};
+  test-44: #{.25} > #{-.25};
+  test-45: #{.25}>#{.}25;
+  test-46: #{.25} >#{.}25;
+  test-47: #{.25}> #{.}25;
+  test-48: #{.25} > #{.}25;
+  test-49: #{-.25}>#{-.25};
+  test-50: #{-.25} >#{-.25};
+  test-51: #{-.25}> #{-.25};
+  test-52: #{-.25} > #{-.25};
+  test-53: #{-.25}>#{.}25;
+  test-54: #{-.25} >#{.}25;
+  test-55: #{-.25}> #{.}25;
+  test-56: #{-.25} > #{.}25;
+  test-57: #{.}25>#{.}25;
+  test-58: #{.}25 >#{.}25;
+  test-59: #{.}25> #{.}25;
+  test-60: #{.}25 > #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/fractions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/error
new file mode 100644
index 0000000000..cd4bd2afc2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "10 gt #AAA".
+        on line 14 of /sass/sass-spec/spec/parser/operations/logic_gt/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/input.scss
new file mode 100644
index 0000000000..03f20c8529
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10>10;
+  test-2: 10 >10;
+  test-3: 10> 10;
+  test-4: 10 > 10;
+  test-5: 10>10%;
+  test-6: 10 >10%;
+  test-7: 10> 10%;
+  test-8: 10 > 10%;
+  test-9: 10>10px;
+  test-10: 10 >10px;
+  test-11: 10> 10px;
+  test-12: 10 > 10px;
+  test-13: 10>#AAA;
+  test-14: 10 >#AAA;
+  test-15: 10> #AAA;
+  test-16: 10 > #AAA;
+  test-17: 10>#{itpl};
+  test-18: 10 >#{itpl};
+  test-19: 10> #{itpl};
+  test-20: 10 > #{itpl};
+  test-21: 10%>10%;
+  test-22: 10% >10%;
+  test-23: 10%> 10%;
+  test-24: 10% > 10%;
+  test-25: 10%>10px;
+  test-26: 10% >10px;
+  test-27: 10%> 10px;
+  test-28: 10% > 10px;
+  test-29: 10%>#AAA;
+  test-30: 10% >#AAA;
+  test-31: 10%> #AAA;
+  test-32: 10% > #AAA;
+  test-33: 10%>#{itpl};
+  test-34: 10% >#{itpl};
+  test-35: 10%> #{itpl};
+  test-36: 10% > #{itpl};
+  test-37: 10px>10px;
+  test-38: 10px >10px;
+  test-39: 10px> 10px;
+  test-40: 10px > 10px;
+  test-41: 10px>#AAA;
+  test-42: 10px >#AAA;
+  test-43: 10px> #AAA;
+  test-44: 10px > #AAA;
+  test-45: 10px>#{itpl};
+  test-46: 10px >#{itpl};
+  test-47: 10px> #{itpl};
+  test-48: 10px > #{itpl};
+  test-49: #AAA>#AAA;
+  test-50: #AAA >#AAA;
+  test-51: #AAA> #AAA;
+  test-52: #AAA > #AAA;
+  test-53: #AAA>#{itpl};
+  test-54: #AAA >#{itpl};
+  test-55: #AAA> #{itpl};
+  test-56: #AAA > #{itpl};
+  test-57: #{itpl}>#{itpl};
+  test-58: #{itpl} >#{itpl};
+  test-59: #{itpl}> #{itpl};
+  test-60: #{itpl} > #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/mixed/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..643e4a0bf7
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: 10>10; test-6: 10 >10; test-7: 10> 10; test-8: 10 > 10; test-9: true0; test-10: true0; test-11: true0; test-12: true0; test-13: 10>10; test-14: 10 >10; test-15: 10> 10; test-16: 10 > 10; test-17: 10>10; test-18: 10 >10; test-19: 10> 10; test-20: 10 > 10; test-21: 10>10; test-22: 10 >10; test-23: 10> 10; test-24: 10 > 10; test-25: 10>10; test-26: 10 >10; test-27: 10> 10; test-28: 10 > 10; test-29: 10>10; test-30: 10 >10; test-31: 10> 10; test-32: 10 > 10; test-33: 10>10; test-34: 10 >10; test-35: 10> 10; test-36: 10 > 10; test-37: 10>10; test-38: 10 >10; test-39: 10> 10; test-40: 10 > 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..743c97908c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:10>10;test-6:10 >10;test-7:10> 10;test-8:10 > 10;test-9:true0;test-10:true0;test-11:true0;test-12:true0;test-13:10>10;test-14:10 >10;test-15:10> 10;test-16:10 > 10;test-17:10>10;test-18:10 >10;test-19:10> 10;test-20:10 > 10;test-21:10>10;test-22:10 >10;test-23:10> 10;test-24:10 > 10;test-25:10>10;test-26:10 >10;test-27:10> 10;test-28:10 > 10;test-29:10>10;test-30:10 >10;test-31:10> 10;test-32:10 > 10;test-33:10>10;test-34:10 >10;test-35:10> 10;test-36:10 > 10;test-37:10>10;test-38:10 >10;test-39:10> 10;test-40:10 > 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..c4423231c4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10>10;
+  test-6: 10 >10;
+  test-7: 10> 10;
+  test-8: 10 > 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10>10;
+  test-14: 10 >10;
+  test-15: 10> 10;
+  test-16: 10 > 10;
+  test-17: 10>10;
+  test-18: 10 >10;
+  test-19: 10> 10;
+  test-20: 10 > 10;
+  test-21: 10>10;
+  test-22: 10 >10;
+  test-23: 10> 10;
+  test-24: 10 > 10;
+  test-25: 10>10;
+  test-26: 10 >10;
+  test-27: 10> 10;
+  test-28: 10 > 10;
+  test-29: 10>10;
+  test-30: 10 >10;
+  test-31: 10> 10;
+  test-32: 10 > 10;
+  test-33: 10>10;
+  test-34: 10 >10;
+  test-35: 10> 10;
+  test-36: 10 > 10;
+  test-37: 10>10;
+  test-38: 10 >10;
+  test-39: 10> 10;
+  test-40: 10 > 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..9c02c24d2b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10>10;
+  test-6: 10 >10;
+  test-7: 10> 10;
+  test-8: 10 > 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10>10;
+  test-14: 10 >10;
+  test-15: 10> 10;
+  test-16: 10 > 10;
+  test-17: 10>10;
+  test-18: 10 >10;
+  test-19: 10> 10;
+  test-20: 10 > 10;
+  test-21: 10>10;
+  test-22: 10 >10;
+  test-23: 10> 10;
+  test-24: 10 > 10;
+  test-25: 10>10;
+  test-26: 10 >10;
+  test-27: 10> 10;
+  test-28: 10 > 10;
+  test-29: 10>10;
+  test-30: 10 >10;
+  test-31: 10> 10;
+  test-32: 10 > 10;
+  test-33: 10>10;
+  test-34: 10 >10;
+  test-35: 10> 10;
+  test-36: 10 > 10;
+  test-37: 10>10;
+  test-38: 10 >10;
+  test-39: 10> 10;
+  test-40: 10 > 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/input.scss
new file mode 100644
index 0000000000..70625c674a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10>10;
+  test-2: 10 >10;
+  test-3: 10> 10;
+  test-4: 10 > 10;
+  test-5: 10>#{10};
+  test-6: 10 >#{10};
+  test-7: 10> #{10};
+  test-8: 10 > #{10};
+  test-9: 10>1#{0};
+  test-10: 10 >1#{0};
+  test-11: 10> 1#{0};
+  test-12: 10 > 1#{0};
+  test-13: 10>#{1}0;
+  test-14: 10 >#{1}0;
+  test-15: 10> #{1}0;
+  test-16: 10 > #{1}0;
+  test-17: #{10}>#{10};
+  test-18: #{10} >#{10};
+  test-19: #{10}> #{10};
+  test-20: #{10} > #{10};
+  test-21: #{10}>1#{0};
+  test-22: #{10} >1#{0};
+  test-23: #{10}> 1#{0};
+  test-24: #{10} > 1#{0};
+  test-25: #{10}>#{1}0;
+  test-26: #{10} >#{1}0;
+  test-27: #{10}> #{1}0;
+  test-28: #{10} > #{1}0;
+  test-29: 1#{0}>1#{0};
+  test-30: 1#{0} >1#{0};
+  test-31: 1#{0}> 1#{0};
+  test-32: 1#{0} > 1#{0};
+  test-33: 1#{0}>#{1}0;
+  test-34: 1#{0} >#{1}0;
+  test-35: 1#{0}> #{1}0;
+  test-36: 1#{0} > #{1}0;
+  test-37: #{1}0>#{1}0;
+  test-38: #{1}0 >#{1}0;
+  test-39: #{1}0> #{1}0;
+  test-40: #{1}0 > #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/numbers/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..d076fa34ab
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant>interpolant; test-38: interpolant >interpolant; test-39: interpolant> interpolant; test-40: interpolant > interpolant; test-41: interpolant>lschema_ritlp; test-42: interpolant >lschema_ritlp; test-43: interpolant> lschema_ritlp; test-44: interpolant > lschema_ritlp; test-45: interpolant>litlp_rschema; test-46: interpolant >litlp_rschema; test-47: interpolant> litlp_rschema; test-48: interpolant > litlp_rschema; test-49: lschema_ritlp>lschema_ritlp; test-50: lschema_ritlp >lschema_ritlp; test-51: lschema_ritlp> lschema_ritlp; test-52: lschema_ritlp > lschema_ritlp; test-53: lschema_ritlp>litlp_rschema; test-54: lschema_ritlp >litlp_rschema; test-55: lschema_ritlp> litlp_rschema; test-56: lschema_ritlp > litlp_rschema; test-57: litlp_rschema>litlp_rschema; test-58: litlp_rschema >litlp_rschema; test-59: litlp_rschema> litlp_rschema; test-60: litlp_rschema > litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..d17b84dfb8
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant>interpolant;test-38:interpolant >interpolant;test-39:interpolant> interpolant;test-40:interpolant > interpolant;test-41:interpolant>lschema_ritlp;test-42:interpolant >lschema_ritlp;test-43:interpolant> lschema_ritlp;test-44:interpolant > lschema_ritlp;test-45:interpolant>litlp_rschema;test-46:interpolant >litlp_rschema;test-47:interpolant> litlp_rschema;test-48:interpolant > litlp_rschema;test-49:lschema_ritlp>lschema_ritlp;test-50:lschema_ritlp >lschema_ritlp;test-51:lschema_ritlp> lschema_ritlp;test-52:lschema_ritlp > lschema_ritlp;test-53:lschema_ritlp>litlp_rschema;test-54:lschema_ritlp >litlp_rschema;test-55:lschema_ritlp> litlp_rschema;test-56:lschema_ritlp > litlp_rschema;test-57:litlp_rschema>litlp_rschema;test-58:litlp_rschema >litlp_rschema;test-59:litlp_rschema> litlp_rschema;test-60:litlp_rschema > litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..b6f12fdb9b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant>interpolant;
+  test-38: interpolant >interpolant;
+  test-39: interpolant> interpolant;
+  test-40: interpolant > interpolant;
+  test-41: interpolant>lschema_ritlp;
+  test-42: interpolant >lschema_ritlp;
+  test-43: interpolant> lschema_ritlp;
+  test-44: interpolant > lschema_ritlp;
+  test-45: interpolant>litlp_rschema;
+  test-46: interpolant >litlp_rschema;
+  test-47: interpolant> litlp_rschema;
+  test-48: interpolant > litlp_rschema;
+  test-49: lschema_ritlp>lschema_ritlp;
+  test-50: lschema_ritlp >lschema_ritlp;
+  test-51: lschema_ritlp> lschema_ritlp;
+  test-52: lschema_ritlp > lschema_ritlp;
+  test-53: lschema_ritlp>litlp_rschema;
+  test-54: lschema_ritlp >litlp_rschema;
+  test-55: lschema_ritlp> litlp_rschema;
+  test-56: lschema_ritlp > litlp_rschema;
+  test-57: litlp_rschema>litlp_rschema;
+  test-58: litlp_rschema >litlp_rschema;
+  test-59: litlp_rschema> litlp_rschema;
+  test-60: litlp_rschema > litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..e7f6018ebb
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant>interpolant;
+  test-38: interpolant >interpolant;
+  test-39: interpolant> interpolant;
+  test-40: interpolant > interpolant;
+  test-41: interpolant>lschema_ritlp;
+  test-42: interpolant >lschema_ritlp;
+  test-43: interpolant> lschema_ritlp;
+  test-44: interpolant > lschema_ritlp;
+  test-45: interpolant>litlp_rschema;
+  test-46: interpolant >litlp_rschema;
+  test-47: interpolant> litlp_rschema;
+  test-48: interpolant > litlp_rschema;
+  test-49: lschema_ritlp>lschema_ritlp;
+  test-50: lschema_ritlp >lschema_ritlp;
+  test-51: lschema_ritlp> lschema_ritlp;
+  test-52: lschema_ritlp > lschema_ritlp;
+  test-53: lschema_ritlp>litlp_rschema;
+  test-54: lschema_ritlp >litlp_rschema;
+  test-55: lschema_ritlp> litlp_rschema;
+  test-56: lschema_ritlp > litlp_rschema;
+  test-57: litlp_rschema>litlp_rschema;
+  test-58: litlp_rschema >litlp_rschema;
+  test-59: litlp_rschema> litlp_rschema;
+  test-60: litlp_rschema > litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/input.scss
new file mode 100644
index 0000000000..6cd004e563
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}>#{interpolant};
+  test-38: #{interpolant} >#{interpolant};
+  test-39: #{interpolant}> #{interpolant};
+  test-40: #{interpolant} > #{interpolant};
+  test-41: #{interpolant}>lschema_#{ritlp};
+  test-42: #{interpolant} >lschema_#{ritlp};
+  test-43: #{interpolant}> lschema_#{ritlp};
+  test-44: #{interpolant} > lschema_#{ritlp};
+  test-45: #{interpolant}>#{litlp}_rschema;
+  test-46: #{interpolant} >#{litlp}_rschema;
+  test-47: #{interpolant}> #{litlp}_rschema;
+  test-48: #{interpolant} > #{litlp}_rschema;
+  test-49: lschema_#{ritlp}>lschema_#{ritlp};
+  test-50: lschema_#{ritlp} >lschema_#{ritlp};
+  test-51: lschema_#{ritlp}> lschema_#{ritlp};
+  test-52: lschema_#{ritlp} > lschema_#{ritlp};
+  test-53: lschema_#{ritlp}>#{litlp}_rschema;
+  test-54: lschema_#{ritlp} >#{litlp}_rschema;
+  test-55: lschema_#{ritlp}> #{litlp}_rschema;
+  test-56: lschema_#{ritlp} > #{litlp}_rschema;
+  test-57: #{litlp}_rschema>#{litlp}_rschema;
+  test-58: #{litlp}_rschema >#{litlp}_rschema;
+  test-59: #{litlp}_rschema> #{litlp}_rschema;
+  test-60: #{litlp}_rschema > #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_gt/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_gt/strings/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/error
new file mode 100644
index 0000000000..0d16f6c36c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "px lte 1".
+        on line 50 of /sass/sass-spec/spec/parser/operations/logic_le/dimensions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..8862a054d4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10<=10;
+  test-2: 10 <=10;
+  test-3: 10<= 10;
+  test-4: 10 <= 10;
+  test-5: 10<=10px;
+  test-6: 10 <=10px;
+  test-7: 10<= 10px;
+  test-8: 10 <= 10px;
+  test-9: 10<=#{10}px;
+  test-10: 10 <=#{10}px;
+  test-11: 10<= #{10}px;
+  test-12: 10 <= #{10}px;
+  test-13: 10<=1#{0}px;
+  test-14: 10 <=1#{0}px;
+  test-15: 10<= 1#{0}px;
+  test-16: 10 <= 1#{0}px;
+  test-17: 10<=10#{px};
+  test-18: 10 <=10#{px};
+  test-19: 10<= 10#{px};
+  test-20: 10 <= 10#{px};
+  test-21: 10<=10#{p}x;
+  test-22: 10 <=10#{p}x;
+  test-23: 10<= 10#{p}x;
+  test-24: 10 <= 10#{p}x;
+  test-25: 10px<=10px;
+  test-26: 10px <=10px;
+  test-27: 10px<= 10px;
+  test-28: 10px <= 10px;
+  test-29: 10px<=#{10}px;
+  test-30: 10px <=#{10}px;
+  test-31: 10px<= #{10}px;
+  test-32: 10px <= #{10}px;
+  test-33: 10px<=1#{0}px;
+  test-34: 10px <=1#{0}px;
+  test-35: 10px<= 1#{0}px;
+  test-36: 10px <= 1#{0}px;
+  test-37: 10px<=10#{px};
+  test-38: 10px <=10#{px};
+  test-39: 10px<= 10#{px};
+  test-40: 10px <= 10#{px};
+  test-41: 10px<=10#{p}x;
+  test-42: 10px <=10#{p}x;
+  test-43: 10px<= 10#{p}x;
+  test-44: 10px <= 10#{p}x;
+  test-45: #{10}px<=#{10}px;
+  test-46: #{10}px <=#{10}px;
+  test-47: #{10}px<= #{10}px;
+  test-48: #{10}px <= #{10}px;
+  test-49: #{10}px<=1#{0}px;
+  test-50: #{10}px <=1#{0}px;
+  test-51: #{10}px<= 1#{0}px;
+  test-52: #{10}px <= 1#{0}px;
+  test-53: #{10}px<=10#{px};
+  test-54: #{10}px <=10#{px};
+  test-55: #{10}px<= 10#{px};
+  test-56: #{10}px <= 10#{px};
+  test-57: #{10}px<=10#{p}x;
+  test-58: #{10}px <=10#{p}x;
+  test-59: #{10}px<= 10#{p}x;
+  test-60: #{10}px <= 10#{p}x;
+  test-61: 1#{0}px<=1#{0}px;
+  test-62: 1#{0}px <=1#{0}px;
+  test-63: 1#{0}px<= 1#{0}px;
+  test-64: 1#{0}px <= 1#{0}px;
+  test-65: 1#{0}px<=10#{px};
+  test-66: 1#{0}px <=10#{px};
+  test-67: 1#{0}px<= 10#{px};
+  test-68: 1#{0}px <= 10#{px};
+  test-69: 1#{0}px<=10#{p}x;
+  test-70: 1#{0}px <=10#{p}x;
+  test-71: 1#{0}px<= 10#{p}x;
+  test-72: 1#{0}px <= 10#{p}x;
+  test-73: 10#{px}<=10#{px};
+  test-74: 10#{px} <=10#{px};
+  test-75: 10#{px}<= 10#{px};
+  test-76: 10#{px} <= 10#{px};
+  test-77: 10#{px}<=10#{p}x;
+  test-78: 10#{px} <=10#{p}x;
+  test-79: 10#{px}<= 10#{p}x;
+  test-80: 10#{px} <= 10#{p}x;
+  test-81: 10#{p}x<=10#{p}x;
+  test-82: 10#{p}x <=10#{p}x;
+  test-83: 10#{p}x<= 10#{p}x;
+  test-84: 10#{p}x <= 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/dimensions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/error
new file mode 100644
index 0000000000..d0301362b2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25<=#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_le/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/input.scss
new file mode 100644
index 0000000000..d1383f15a0
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25<=.25;
+  test-2: .25 <=.25;
+  test-3: .25<= .25;
+  test-4: .25 <= .25;
+  test-5: .25<=-.25;
+  test-6: .25 <=-.25;
+  test-7: .25<= -.25;
+  test-8: .25 <= -.25;
+  test-9: .25<=#{.25};
+  test-10: .25 <=#{.25};
+  test-11: .25<= #{.25};
+  test-12: .25 <= #{.25};
+  test-13: .25<=#{-.25};
+  test-14: .25 <=#{-.25};
+  test-15: .25<= #{-.25};
+  test-16: .25 <= #{-.25};
+  test-17: .25<=#{.}25;
+  test-18: .25 <=#{.}25;
+  test-19: .25<= #{.}25;
+  test-20: .25 <= #{.}25;
+  test-21: -.25<=-.25;
+  test-22: -.25 <=-.25;
+  test-23: -.25<= -.25;
+  test-24: -.25 <= -.25;
+  test-25: -.25<=#{.25};
+  test-26: -.25 <=#{.25};
+  test-27: -.25<= #{.25};
+  test-28: -.25 <= #{.25};
+  test-29: -.25<=#{-.25};
+  test-30: -.25 <=#{-.25};
+  test-31: -.25<= #{-.25};
+  test-32: -.25 <= #{-.25};
+  test-33: -.25<=#{.}25;
+  test-34: -.25 <=#{.}25;
+  test-35: -.25<= #{.}25;
+  test-36: -.25 <= #{.}25;
+  test-37: #{.25}<=#{.25};
+  test-38: #{.25} <=#{.25};
+  test-39: #{.25}<= #{.25};
+  test-40: #{.25} <= #{.25};
+  test-41: #{.25}<=#{-.25};
+  test-42: #{.25} <=#{-.25};
+  test-43: #{.25}<= #{-.25};
+  test-44: #{.25} <= #{-.25};
+  test-45: #{.25}<=#{.}25;
+  test-46: #{.25} <=#{.}25;
+  test-47: #{.25}<= #{.}25;
+  test-48: #{.25} <= #{.}25;
+  test-49: #{-.25}<=#{-.25};
+  test-50: #{-.25} <=#{-.25};
+  test-51: #{-.25}<= #{-.25};
+  test-52: #{-.25} <= #{-.25};
+  test-53: #{-.25}<=#{.}25;
+  test-54: #{-.25} <=#{.}25;
+  test-55: #{-.25}<= #{.}25;
+  test-56: #{-.25} <= #{.}25;
+  test-57: #{.}25<=#{.}25;
+  test-58: #{.}25 <=#{.}25;
+  test-59: #{.}25<= #{.}25;
+  test-60: #{.}25 <= #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/fractions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/error
new file mode 100644
index 0000000000..5d3a6978c1
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "10 lte #AAA".
+        on line 14 of /sass/sass-spec/spec/parser/operations/logic_le/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/input.scss
new file mode 100644
index 0000000000..50f78c98ad
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10<=10;
+  test-2: 10 <=10;
+  test-3: 10<= 10;
+  test-4: 10 <= 10;
+  test-5: 10<=10%;
+  test-6: 10 <=10%;
+  test-7: 10<= 10%;
+  test-8: 10 <= 10%;
+  test-9: 10<=10px;
+  test-10: 10 <=10px;
+  test-11: 10<= 10px;
+  test-12: 10 <= 10px;
+  test-13: 10<=#AAA;
+  test-14: 10 <=#AAA;
+  test-15: 10<= #AAA;
+  test-16: 10 <= #AAA;
+  test-17: 10<=#{itpl};
+  test-18: 10 <=#{itpl};
+  test-19: 10<= #{itpl};
+  test-20: 10 <= #{itpl};
+  test-21: 10%<=10%;
+  test-22: 10% <=10%;
+  test-23: 10%<= 10%;
+  test-24: 10% <= 10%;
+  test-25: 10%<=10px;
+  test-26: 10% <=10px;
+  test-27: 10%<= 10px;
+  test-28: 10% <= 10px;
+  test-29: 10%<=#AAA;
+  test-30: 10% <=#AAA;
+  test-31: 10%<= #AAA;
+  test-32: 10% <= #AAA;
+  test-33: 10%<=#{itpl};
+  test-34: 10% <=#{itpl};
+  test-35: 10%<= #{itpl};
+  test-36: 10% <= #{itpl};
+  test-37: 10px<=10px;
+  test-38: 10px <=10px;
+  test-39: 10px<= 10px;
+  test-40: 10px <= 10px;
+  test-41: 10px<=#AAA;
+  test-42: 10px <=#AAA;
+  test-43: 10px<= #AAA;
+  test-44: 10px <= #AAA;
+  test-45: 10px<=#{itpl};
+  test-46: 10px <=#{itpl};
+  test-47: 10px<= #{itpl};
+  test-48: 10px <= #{itpl};
+  test-49: #AAA<=#AAA;
+  test-50: #AAA <=#AAA;
+  test-51: #AAA<= #AAA;
+  test-52: #AAA <= #AAA;
+  test-53: #AAA<=#{itpl};
+  test-54: #AAA <=#{itpl};
+  test-55: #AAA<= #{itpl};
+  test-56: #AAA <= #{itpl};
+  test-57: #{itpl}<=#{itpl};
+  test-58: #{itpl} <=#{itpl};
+  test-59: #{itpl}<= #{itpl};
+  test-60: #{itpl} <= #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/mixed/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..44c445a38d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: true; test-2: true; test-3: true; test-4: true; test-5: 10<=10; test-6: 10 <=10; test-7: 10<= 10; test-8: 10 <= 10; test-9: false0; test-10: false0; test-11: false0; test-12: false0; test-13: 10<=10; test-14: 10 <=10; test-15: 10<= 10; test-16: 10 <= 10; test-17: 10<=10; test-18: 10 <=10; test-19: 10<= 10; test-20: 10 <= 10; test-21: 10<=10; test-22: 10 <=10; test-23: 10<= 10; test-24: 10 <= 10; test-25: 10<=10; test-26: 10 <=10; test-27: 10<= 10; test-28: 10 <= 10; test-29: 10<=10; test-30: 10 <=10; test-31: 10<= 10; test-32: 10 <= 10; test-33: 10<=10; test-34: 10 <=10; test-35: 10<= 10; test-36: 10 <= 10; test-37: 10<=10; test-38: 10 <=10; test-39: 10<= 10; test-40: 10 <= 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..ccb27c453e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:true;test-2:true;test-3:true;test-4:true;test-5:10<=10;test-6:10 <=10;test-7:10<= 10;test-8:10 <= 10;test-9:false0;test-10:false0;test-11:false0;test-12:false0;test-13:10<=10;test-14:10 <=10;test-15:10<= 10;test-16:10 <= 10;test-17:10<=10;test-18:10 <=10;test-19:10<= 10;test-20:10 <= 10;test-21:10<=10;test-22:10 <=10;test-23:10<= 10;test-24:10 <= 10;test-25:10<=10;test-26:10 <=10;test-27:10<= 10;test-28:10 <= 10;test-29:10<=10;test-30:10 <=10;test-31:10<= 10;test-32:10 <= 10;test-33:10<=10;test-34:10 <=10;test-35:10<= 10;test-36:10 <= 10;test-37:10<=10;test-38:10 <=10;test-39:10<= 10;test-40:10 <= 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..35001e9572
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10<=10;
+  test-6: 10 <=10;
+  test-7: 10<= 10;
+  test-8: 10 <= 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10<=10;
+  test-14: 10 <=10;
+  test-15: 10<= 10;
+  test-16: 10 <= 10;
+  test-17: 10<=10;
+  test-18: 10 <=10;
+  test-19: 10<= 10;
+  test-20: 10 <= 10;
+  test-21: 10<=10;
+  test-22: 10 <=10;
+  test-23: 10<= 10;
+  test-24: 10 <= 10;
+  test-25: 10<=10;
+  test-26: 10 <=10;
+  test-27: 10<= 10;
+  test-28: 10 <= 10;
+  test-29: 10<=10;
+  test-30: 10 <=10;
+  test-31: 10<= 10;
+  test-32: 10 <= 10;
+  test-33: 10<=10;
+  test-34: 10 <=10;
+  test-35: 10<= 10;
+  test-36: 10 <= 10;
+  test-37: 10<=10;
+  test-38: 10 <=10;
+  test-39: 10<= 10;
+  test-40: 10 <= 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..e4d448f6d3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: true;
+  test-2: true;
+  test-3: true;
+  test-4: true;
+  test-5: 10<=10;
+  test-6: 10 <=10;
+  test-7: 10<= 10;
+  test-8: 10 <= 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10<=10;
+  test-14: 10 <=10;
+  test-15: 10<= 10;
+  test-16: 10 <= 10;
+  test-17: 10<=10;
+  test-18: 10 <=10;
+  test-19: 10<= 10;
+  test-20: 10 <= 10;
+  test-21: 10<=10;
+  test-22: 10 <=10;
+  test-23: 10<= 10;
+  test-24: 10 <= 10;
+  test-25: 10<=10;
+  test-26: 10 <=10;
+  test-27: 10<= 10;
+  test-28: 10 <= 10;
+  test-29: 10<=10;
+  test-30: 10 <=10;
+  test-31: 10<= 10;
+  test-32: 10 <= 10;
+  test-33: 10<=10;
+  test-34: 10 <=10;
+  test-35: 10<= 10;
+  test-36: 10 <= 10;
+  test-37: 10<=10;
+  test-38: 10 <=10;
+  test-39: 10<= 10;
+  test-40: 10 <= 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/input.scss
new file mode 100644
index 0000000000..0900c47c2f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10<=10;
+  test-2: 10 <=10;
+  test-3: 10<= 10;
+  test-4: 10 <= 10;
+  test-5: 10<=#{10};
+  test-6: 10 <=#{10};
+  test-7: 10<= #{10};
+  test-8: 10 <= #{10};
+  test-9: 10<=1#{0};
+  test-10: 10 <=1#{0};
+  test-11: 10<= 1#{0};
+  test-12: 10 <= 1#{0};
+  test-13: 10<=#{1}0;
+  test-14: 10 <=#{1}0;
+  test-15: 10<= #{1}0;
+  test-16: 10 <= #{1}0;
+  test-17: #{10}<=#{10};
+  test-18: #{10} <=#{10};
+  test-19: #{10}<= #{10};
+  test-20: #{10} <= #{10};
+  test-21: #{10}<=1#{0};
+  test-22: #{10} <=1#{0};
+  test-23: #{10}<= 1#{0};
+  test-24: #{10} <= 1#{0};
+  test-25: #{10}<=#{1}0;
+  test-26: #{10} <=#{1}0;
+  test-27: #{10}<= #{1}0;
+  test-28: #{10} <= #{1}0;
+  test-29: 1#{0}<=1#{0};
+  test-30: 1#{0} <=1#{0};
+  test-31: 1#{0}<= 1#{0};
+  test-32: 1#{0} <= 1#{0};
+  test-33: 1#{0}<=#{1}0;
+  test-34: 1#{0} <=#{1}0;
+  test-35: 1#{0}<= #{1}0;
+  test-36: 1#{0} <= #{1}0;
+  test-37: #{1}0<=#{1}0;
+  test-38: #{1}0 <=#{1}0;
+  test-39: #{1}0<= #{1}0;
+  test-40: #{1}0 <= #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/numbers/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..98d92926ba
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant<=interpolant; test-38: interpolant <=interpolant; test-39: interpolant<= interpolant; test-40: interpolant <= interpolant; test-41: interpolant<=lschema_ritlp; test-42: interpolant <=lschema_ritlp; test-43: interpolant<= lschema_ritlp; test-44: interpolant <= lschema_ritlp; test-45: interpolant<=litlp_rschema; test-46: interpolant <=litlp_rschema; test-47: interpolant<= litlp_rschema; test-48: interpolant <= litlp_rschema; test-49: lschema_ritlp<=lschema_ritlp; test-50: lschema_ritlp <=lschema_ritlp; test-51: lschema_ritlp<= lschema_ritlp; test-52: lschema_ritlp <= lschema_ritlp; test-53: lschema_ritlp<=litlp_rschema; test-54: lschema_ritlp <=litlp_rschema; test-55: lschema_ritlp<= litlp_rschema; test-56: lschema_ritlp <= litlp_rschema; test-57: litlp_rschema<=litlp_rschema; test-58: litlp_rschema <=litlp_rschema; test-59: litlp_rschema<= litlp_rschema; test-60: litlp_rschema <= litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..284c92e1a7
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant<=interpolant;test-38:interpolant <=interpolant;test-39:interpolant<= interpolant;test-40:interpolant <= interpolant;test-41:interpolant<=lschema_ritlp;test-42:interpolant <=lschema_ritlp;test-43:interpolant<= lschema_ritlp;test-44:interpolant <= lschema_ritlp;test-45:interpolant<=litlp_rschema;test-46:interpolant <=litlp_rschema;test-47:interpolant<= litlp_rschema;test-48:interpolant <= litlp_rschema;test-49:lschema_ritlp<=lschema_ritlp;test-50:lschema_ritlp <=lschema_ritlp;test-51:lschema_ritlp<= lschema_ritlp;test-52:lschema_ritlp <= lschema_ritlp;test-53:lschema_ritlp<=litlp_rschema;test-54:lschema_ritlp <=litlp_rschema;test-55:lschema_ritlp<= litlp_rschema;test-56:lschema_ritlp <= litlp_rschema;test-57:litlp_rschema<=litlp_rschema;test-58:litlp_rschema <=litlp_rschema;test-59:litlp_rschema<= litlp_rschema;test-60:litlp_rschema <= litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..6f07a79e81
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant<=interpolant;
+  test-38: interpolant <=interpolant;
+  test-39: interpolant<= interpolant;
+  test-40: interpolant <= interpolant;
+  test-41: interpolant<=lschema_ritlp;
+  test-42: interpolant <=lschema_ritlp;
+  test-43: interpolant<= lschema_ritlp;
+  test-44: interpolant <= lschema_ritlp;
+  test-45: interpolant<=litlp_rschema;
+  test-46: interpolant <=litlp_rschema;
+  test-47: interpolant<= litlp_rschema;
+  test-48: interpolant <= litlp_rschema;
+  test-49: lschema_ritlp<=lschema_ritlp;
+  test-50: lschema_ritlp <=lschema_ritlp;
+  test-51: lschema_ritlp<= lschema_ritlp;
+  test-52: lschema_ritlp <= lschema_ritlp;
+  test-53: lschema_ritlp<=litlp_rschema;
+  test-54: lschema_ritlp <=litlp_rschema;
+  test-55: lschema_ritlp<= litlp_rschema;
+  test-56: lschema_ritlp <= litlp_rschema;
+  test-57: litlp_rschema<=litlp_rschema;
+  test-58: litlp_rschema <=litlp_rschema;
+  test-59: litlp_rschema<= litlp_rschema;
+  test-60: litlp_rschema <= litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..e6f872a671
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant<=interpolant;
+  test-38: interpolant <=interpolant;
+  test-39: interpolant<= interpolant;
+  test-40: interpolant <= interpolant;
+  test-41: interpolant<=lschema_ritlp;
+  test-42: interpolant <=lschema_ritlp;
+  test-43: interpolant<= lschema_ritlp;
+  test-44: interpolant <= lschema_ritlp;
+  test-45: interpolant<=litlp_rschema;
+  test-46: interpolant <=litlp_rschema;
+  test-47: interpolant<= litlp_rschema;
+  test-48: interpolant <= litlp_rschema;
+  test-49: lschema_ritlp<=lschema_ritlp;
+  test-50: lschema_ritlp <=lschema_ritlp;
+  test-51: lschema_ritlp<= lschema_ritlp;
+  test-52: lschema_ritlp <= lschema_ritlp;
+  test-53: lschema_ritlp<=litlp_rschema;
+  test-54: lschema_ritlp <=litlp_rschema;
+  test-55: lschema_ritlp<= litlp_rschema;
+  test-56: lschema_ritlp <= litlp_rschema;
+  test-57: litlp_rschema<=litlp_rschema;
+  test-58: litlp_rschema <=litlp_rschema;
+  test-59: litlp_rschema<= litlp_rschema;
+  test-60: litlp_rschema <= litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/input.scss
new file mode 100644
index 0000000000..734c49eaa5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}<=#{interpolant};
+  test-38: #{interpolant} <=#{interpolant};
+  test-39: #{interpolant}<= #{interpolant};
+  test-40: #{interpolant} <= #{interpolant};
+  test-41: #{interpolant}<=lschema_#{ritlp};
+  test-42: #{interpolant} <=lschema_#{ritlp};
+  test-43: #{interpolant}<= lschema_#{ritlp};
+  test-44: #{interpolant} <= lschema_#{ritlp};
+  test-45: #{interpolant}<=#{litlp}_rschema;
+  test-46: #{interpolant} <=#{litlp}_rschema;
+  test-47: #{interpolant}<= #{litlp}_rschema;
+  test-48: #{interpolant} <= #{litlp}_rschema;
+  test-49: lschema_#{ritlp}<=lschema_#{ritlp};
+  test-50: lschema_#{ritlp} <=lschema_#{ritlp};
+  test-51: lschema_#{ritlp}<= lschema_#{ritlp};
+  test-52: lschema_#{ritlp} <= lschema_#{ritlp};
+  test-53: lschema_#{ritlp}<=#{litlp}_rschema;
+  test-54: lschema_#{ritlp} <=#{litlp}_rschema;
+  test-55: lschema_#{ritlp}<= #{litlp}_rschema;
+  test-56: lschema_#{ritlp} <= #{litlp}_rschema;
+  test-57: #{litlp}_rschema<=#{litlp}_rschema;
+  test-58: #{litlp}_rschema <=#{litlp}_rschema;
+  test-59: #{litlp}_rschema<= #{litlp}_rschema;
+  test-60: #{litlp}_rschema <= #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_le/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_le/strings/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_le/strings/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/error
new file mode 100644
index 0000000000..76acf9507f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "px lt 1".
+        on line 50 of /sass/sass-spec/spec/parser/operations/logic_lt/dimensions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..6a719fab67
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10<10;
+  test-2: 10 <10;
+  test-3: 10< 10;
+  test-4: 10 < 10;
+  test-5: 10<10px;
+  test-6: 10 <10px;
+  test-7: 10< 10px;
+  test-8: 10 < 10px;
+  test-9: 10<#{10}px;
+  test-10: 10 <#{10}px;
+  test-11: 10< #{10}px;
+  test-12: 10 < #{10}px;
+  test-13: 10<1#{0}px;
+  test-14: 10 <1#{0}px;
+  test-15: 10< 1#{0}px;
+  test-16: 10 < 1#{0}px;
+  test-17: 10<10#{px};
+  test-18: 10 <10#{px};
+  test-19: 10< 10#{px};
+  test-20: 10 < 10#{px};
+  test-21: 10<10#{p}x;
+  test-22: 10 <10#{p}x;
+  test-23: 10< 10#{p}x;
+  test-24: 10 < 10#{p}x;
+  test-25: 10px<10px;
+  test-26: 10px <10px;
+  test-27: 10px< 10px;
+  test-28: 10px < 10px;
+  test-29: 10px<#{10}px;
+  test-30: 10px <#{10}px;
+  test-31: 10px< #{10}px;
+  test-32: 10px < #{10}px;
+  test-33: 10px<1#{0}px;
+  test-34: 10px <1#{0}px;
+  test-35: 10px< 1#{0}px;
+  test-36: 10px < 1#{0}px;
+  test-37: 10px<10#{px};
+  test-38: 10px <10#{px};
+  test-39: 10px< 10#{px};
+  test-40: 10px < 10#{px};
+  test-41: 10px<10#{p}x;
+  test-42: 10px <10#{p}x;
+  test-43: 10px< 10#{p}x;
+  test-44: 10px < 10#{p}x;
+  test-45: #{10}px<#{10}px;
+  test-46: #{10}px <#{10}px;
+  test-47: #{10}px< #{10}px;
+  test-48: #{10}px < #{10}px;
+  test-49: #{10}px<1#{0}px;
+  test-50: #{10}px <1#{0}px;
+  test-51: #{10}px< 1#{0}px;
+  test-52: #{10}px < 1#{0}px;
+  test-53: #{10}px<10#{px};
+  test-54: #{10}px <10#{px};
+  test-55: #{10}px< 10#{px};
+  test-56: #{10}px < 10#{px};
+  test-57: #{10}px<10#{p}x;
+  test-58: #{10}px <10#{p}x;
+  test-59: #{10}px< 10#{p}x;
+  test-60: #{10}px < 10#{p}x;
+  test-61: 1#{0}px<1#{0}px;
+  test-62: 1#{0}px <1#{0}px;
+  test-63: 1#{0}px< 1#{0}px;
+  test-64: 1#{0}px < 1#{0}px;
+  test-65: 1#{0}px<10#{px};
+  test-66: 1#{0}px <10#{px};
+  test-67: 1#{0}px< 10#{px};
+  test-68: 1#{0}px < 10#{px};
+  test-69: 1#{0}px<10#{p}x;
+  test-70: 1#{0}px <10#{p}x;
+  test-71: 1#{0}px< 10#{p}x;
+  test-72: 1#{0}px < 10#{p}x;
+  test-73: 10#{px}<10#{px};
+  test-74: 10#{px} <10#{px};
+  test-75: 10#{px}< 10#{px};
+  test-76: 10#{px} < 10#{px};
+  test-77: 10#{px}<10#{p}x;
+  test-78: 10#{px} <10#{p}x;
+  test-79: 10#{px}< 10#{p}x;
+  test-80: 10#{px} < 10#{p}x;
+  test-81: 10#{p}x<10#{p}x;
+  test-82: 10#{p}x <10#{p}x;
+  test-83: 10#{p}x< 10#{p}x;
+  test-84: 10#{p}x < 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/dimensions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/error
new file mode 100644
index 0000000000..a1d849e244
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25<#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_lt/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/input.scss
new file mode 100644
index 0000000000..5a78fb5717
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25<.25;
+  test-2: .25 <.25;
+  test-3: .25< .25;
+  test-4: .25 < .25;
+  test-5: .25<-.25;
+  test-6: .25 <-.25;
+  test-7: .25< -.25;
+  test-8: .25 < -.25;
+  test-9: .25<#{.25};
+  test-10: .25 <#{.25};
+  test-11: .25< #{.25};
+  test-12: .25 < #{.25};
+  test-13: .25<#{-.25};
+  test-14: .25 <#{-.25};
+  test-15: .25< #{-.25};
+  test-16: .25 < #{-.25};
+  test-17: .25<#{.}25;
+  test-18: .25 <#{.}25;
+  test-19: .25< #{.}25;
+  test-20: .25 < #{.}25;
+  test-21: -.25<-.25;
+  test-22: -.25 <-.25;
+  test-23: -.25< -.25;
+  test-24: -.25 < -.25;
+  test-25: -.25<#{.25};
+  test-26: -.25 <#{.25};
+  test-27: -.25< #{.25};
+  test-28: -.25 < #{.25};
+  test-29: -.25<#{-.25};
+  test-30: -.25 <#{-.25};
+  test-31: -.25< #{-.25};
+  test-32: -.25 < #{-.25};
+  test-33: -.25<#{.}25;
+  test-34: -.25 <#{.}25;
+  test-35: -.25< #{.}25;
+  test-36: -.25 < #{.}25;
+  test-37: #{.25}<#{.25};
+  test-38: #{.25} <#{.25};
+  test-39: #{.25}< #{.25};
+  test-40: #{.25} < #{.25};
+  test-41: #{.25}<#{-.25};
+  test-42: #{.25} <#{-.25};
+  test-43: #{.25}< #{-.25};
+  test-44: #{.25} < #{-.25};
+  test-45: #{.25}<#{.}25;
+  test-46: #{.25} <#{.}25;
+  test-47: #{.25}< #{.}25;
+  test-48: #{.25} < #{.}25;
+  test-49: #{-.25}<#{-.25};
+  test-50: #{-.25} <#{-.25};
+  test-51: #{-.25}< #{-.25};
+  test-52: #{-.25} < #{-.25};
+  test-53: #{-.25}<#{.}25;
+  test-54: #{-.25} <#{.}25;
+  test-55: #{-.25}< #{.}25;
+  test-56: #{-.25} < #{.}25;
+  test-57: #{.}25<#{.}25;
+  test-58: #{.}25 <#{.}25;
+  test-59: #{.}25< #{.}25;
+  test-60: #{.}25 < #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/fractions/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/error
new file mode 100644
index 0000000000..7771a8e1f2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "10 lt #AAA".
+        on line 14 of /sass/sass-spec/spec/parser/operations/logic_lt/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/input.scss
new file mode 100644
index 0000000000..bc63f569cf
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10<10;
+  test-2: 10 <10;
+  test-3: 10< 10;
+  test-4: 10 < 10;
+  test-5: 10<10%;
+  test-6: 10 <10%;
+  test-7: 10< 10%;
+  test-8: 10 < 10%;
+  test-9: 10<10px;
+  test-10: 10 <10px;
+  test-11: 10< 10px;
+  test-12: 10 < 10px;
+  test-13: 10<#AAA;
+  test-14: 10 <#AAA;
+  test-15: 10< #AAA;
+  test-16: 10 < #AAA;
+  test-17: 10<#{itpl};
+  test-18: 10 <#{itpl};
+  test-19: 10< #{itpl};
+  test-20: 10 < #{itpl};
+  test-21: 10%<10%;
+  test-22: 10% <10%;
+  test-23: 10%< 10%;
+  test-24: 10% < 10%;
+  test-25: 10%<10px;
+  test-26: 10% <10px;
+  test-27: 10%< 10px;
+  test-28: 10% < 10px;
+  test-29: 10%<#AAA;
+  test-30: 10% <#AAA;
+  test-31: 10%< #AAA;
+  test-32: 10% < #AAA;
+  test-33: 10%<#{itpl};
+  test-34: 10% <#{itpl};
+  test-35: 10%< #{itpl};
+  test-36: 10% < #{itpl};
+  test-37: 10px<10px;
+  test-38: 10px <10px;
+  test-39: 10px< 10px;
+  test-40: 10px < 10px;
+  test-41: 10px<#AAA;
+  test-42: 10px <#AAA;
+  test-43: 10px< #AAA;
+  test-44: 10px < #AAA;
+  test-45: 10px<#{itpl};
+  test-46: 10px <#{itpl};
+  test-47: 10px< #{itpl};
+  test-48: 10px < #{itpl};
+  test-49: #AAA<#AAA;
+  test-50: #AAA <#AAA;
+  test-51: #AAA< #AAA;
+  test-52: #AAA < #AAA;
+  test-53: #AAA<#{itpl};
+  test-54: #AAA <#{itpl};
+  test-55: #AAA< #{itpl};
+  test-56: #AAA < #{itpl};
+  test-57: #{itpl}<#{itpl};
+  test-58: #{itpl} <#{itpl};
+  test-59: #{itpl}< #{itpl};
+  test-60: #{itpl} < #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/mixed/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..1009c6d08f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: 10<10; test-6: 10 <10; test-7: 10< 10; test-8: 10 < 10; test-9: false0; test-10: false0; test-11: false0; test-12: false0; test-13: 10<10; test-14: 10 <10; test-15: 10< 10; test-16: 10 < 10; test-17: 10<10; test-18: 10 <10; test-19: 10< 10; test-20: 10 < 10; test-21: 10<10; test-22: 10 <10; test-23: 10< 10; test-24: 10 < 10; test-25: 10<10; test-26: 10 <10; test-27: 10< 10; test-28: 10 < 10; test-29: 10<10; test-30: 10 <10; test-31: 10< 10; test-32: 10 < 10; test-33: 10<10; test-34: 10 <10; test-35: 10< 10; test-36: 10 < 10; test-37: 10<10; test-38: 10 <10; test-39: 10< 10; test-40: 10 < 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..0b1b001c50
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:10<10;test-6:10 <10;test-7:10< 10;test-8:10 < 10;test-9:false0;test-10:false0;test-11:false0;test-12:false0;test-13:10<10;test-14:10 <10;test-15:10< 10;test-16:10 < 10;test-17:10<10;test-18:10 <10;test-19:10< 10;test-20:10 < 10;test-21:10<10;test-22:10 <10;test-23:10< 10;test-24:10 < 10;test-25:10<10;test-26:10 <10;test-27:10< 10;test-28:10 < 10;test-29:10<10;test-30:10 <10;test-31:10< 10;test-32:10 < 10;test-33:10<10;test-34:10 <10;test-35:10< 10;test-36:10 < 10;test-37:10<10;test-38:10 <10;test-39:10< 10;test-40:10 < 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..f0bfa91d73
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10<10;
+  test-6: 10 <10;
+  test-7: 10< 10;
+  test-8: 10 < 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10<10;
+  test-14: 10 <10;
+  test-15: 10< 10;
+  test-16: 10 < 10;
+  test-17: 10<10;
+  test-18: 10 <10;
+  test-19: 10< 10;
+  test-20: 10 < 10;
+  test-21: 10<10;
+  test-22: 10 <10;
+  test-23: 10< 10;
+  test-24: 10 < 10;
+  test-25: 10<10;
+  test-26: 10 <10;
+  test-27: 10< 10;
+  test-28: 10 < 10;
+  test-29: 10<10;
+  test-30: 10 <10;
+  test-31: 10< 10;
+  test-32: 10 < 10;
+  test-33: 10<10;
+  test-34: 10 <10;
+  test-35: 10< 10;
+  test-36: 10 < 10;
+  test-37: 10<10;
+  test-38: 10 <10;
+  test-39: 10< 10;
+  test-40: 10 < 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..0ebab971fe
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10<10;
+  test-6: 10 <10;
+  test-7: 10< 10;
+  test-8: 10 < 10;
+  test-9: false0;
+  test-10: false0;
+  test-11: false0;
+  test-12: false0;
+  test-13: 10<10;
+  test-14: 10 <10;
+  test-15: 10< 10;
+  test-16: 10 < 10;
+  test-17: 10<10;
+  test-18: 10 <10;
+  test-19: 10< 10;
+  test-20: 10 < 10;
+  test-21: 10<10;
+  test-22: 10 <10;
+  test-23: 10< 10;
+  test-24: 10 < 10;
+  test-25: 10<10;
+  test-26: 10 <10;
+  test-27: 10< 10;
+  test-28: 10 < 10;
+  test-29: 10<10;
+  test-30: 10 <10;
+  test-31: 10< 10;
+  test-32: 10 < 10;
+  test-33: 10<10;
+  test-34: 10 <10;
+  test-35: 10< 10;
+  test-36: 10 < 10;
+  test-37: 10<10;
+  test-38: 10 <10;
+  test-39: 10< 10;
+  test-40: 10 < 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/input.scss
new file mode 100644
index 0000000000..702c9eb356
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10<10;
+  test-2: 10 <10;
+  test-3: 10< 10;
+  test-4: 10 < 10;
+  test-5: 10<#{10};
+  test-6: 10 <#{10};
+  test-7: 10< #{10};
+  test-8: 10 < #{10};
+  test-9: 10<1#{0};
+  test-10: 10 <1#{0};
+  test-11: 10< 1#{0};
+  test-12: 10 < 1#{0};
+  test-13: 10<#{1}0;
+  test-14: 10 <#{1}0;
+  test-15: 10< #{1}0;
+  test-16: 10 < #{1}0;
+  test-17: #{10}<#{10};
+  test-18: #{10} <#{10};
+  test-19: #{10}< #{10};
+  test-20: #{10} < #{10};
+  test-21: #{10}<1#{0};
+  test-22: #{10} <1#{0};
+  test-23: #{10}< 1#{0};
+  test-24: #{10} < 1#{0};
+  test-25: #{10}<#{1}0;
+  test-26: #{10} <#{1}0;
+  test-27: #{10}< #{1}0;
+  test-28: #{10} < #{1}0;
+  test-29: 1#{0}<1#{0};
+  test-30: 1#{0} <1#{0};
+  test-31: 1#{0}< 1#{0};
+  test-32: 1#{0} < 1#{0};
+  test-33: 1#{0}<#{1}0;
+  test-34: 1#{0} <#{1}0;
+  test-35: 1#{0}< #{1}0;
+  test-36: 1#{0} < #{1}0;
+  test-37: #{1}0<#{1}0;
+  test-38: #{1}0 <#{1}0;
+  test-39: #{1}0< #{1}0;
+  test-40: #{1}0 < #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/numbers/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..d6ac0a7292
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant<interpolant; test-38: interpolant <interpolant; test-39: interpolant< interpolant; test-40: interpolant < interpolant; test-41: interpolant<lschema_ritlp; test-42: interpolant <lschema_ritlp; test-43: interpolant< lschema_ritlp; test-44: interpolant < lschema_ritlp; test-45: interpolant<litlp_rschema; test-46: interpolant <litlp_rschema; test-47: interpolant< litlp_rschema; test-48: interpolant < litlp_rschema; test-49: lschema_ritlp<lschema_ritlp; test-50: lschema_ritlp <lschema_ritlp; test-51: lschema_ritlp< lschema_ritlp; test-52: lschema_ritlp < lschema_ritlp; test-53: lschema_ritlp<litlp_rschema; test-54: lschema_ritlp <litlp_rschema; test-55: lschema_ritlp< litlp_rschema; test-56: lschema_ritlp < litlp_rschema; test-57: litlp_rschema<litlp_rschema; test-58: litlp_rschema <litlp_rschema; test-59: litlp_rschema< litlp_rschema; test-60: litlp_rschema < litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..9403059339
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant<interpolant;test-38:interpolant <interpolant;test-39:interpolant< interpolant;test-40:interpolant < interpolant;test-41:interpolant<lschema_ritlp;test-42:interpolant <lschema_ritlp;test-43:interpolant< lschema_ritlp;test-44:interpolant < lschema_ritlp;test-45:interpolant<litlp_rschema;test-46:interpolant <litlp_rschema;test-47:interpolant< litlp_rschema;test-48:interpolant < litlp_rschema;test-49:lschema_ritlp<lschema_ritlp;test-50:lschema_ritlp <lschema_ritlp;test-51:lschema_ritlp< lschema_ritlp;test-52:lschema_ritlp < lschema_ritlp;test-53:lschema_ritlp<litlp_rschema;test-54:lschema_ritlp <litlp_rschema;test-55:lschema_ritlp< litlp_rschema;test-56:lschema_ritlp < litlp_rschema;test-57:litlp_rschema<litlp_rschema;test-58:litlp_rschema <litlp_rschema;test-59:litlp_rschema< litlp_rschema;test-60:litlp_rschema < litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..5dbed78270
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant<interpolant;
+  test-38: interpolant <interpolant;
+  test-39: interpolant< interpolant;
+  test-40: interpolant < interpolant;
+  test-41: interpolant<lschema_ritlp;
+  test-42: interpolant <lschema_ritlp;
+  test-43: interpolant< lschema_ritlp;
+  test-44: interpolant < lschema_ritlp;
+  test-45: interpolant<litlp_rschema;
+  test-46: interpolant <litlp_rschema;
+  test-47: interpolant< litlp_rschema;
+  test-48: interpolant < litlp_rschema;
+  test-49: lschema_ritlp<lschema_ritlp;
+  test-50: lschema_ritlp <lschema_ritlp;
+  test-51: lschema_ritlp< lschema_ritlp;
+  test-52: lschema_ritlp < lschema_ritlp;
+  test-53: lschema_ritlp<litlp_rschema;
+  test-54: lschema_ritlp <litlp_rschema;
+  test-55: lschema_ritlp< litlp_rschema;
+  test-56: lschema_ritlp < litlp_rschema;
+  test-57: litlp_rschema<litlp_rschema;
+  test-58: litlp_rschema <litlp_rschema;
+  test-59: litlp_rschema< litlp_rschema;
+  test-60: litlp_rschema < litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..0d25325c76
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant<interpolant;
+  test-38: interpolant <interpolant;
+  test-39: interpolant< interpolant;
+  test-40: interpolant < interpolant;
+  test-41: interpolant<lschema_ritlp;
+  test-42: interpolant <lschema_ritlp;
+  test-43: interpolant< lschema_ritlp;
+  test-44: interpolant < lschema_ritlp;
+  test-45: interpolant<litlp_rschema;
+  test-46: interpolant <litlp_rschema;
+  test-47: interpolant< litlp_rschema;
+  test-48: interpolant < litlp_rschema;
+  test-49: lschema_ritlp<lschema_ritlp;
+  test-50: lschema_ritlp <lschema_ritlp;
+  test-51: lschema_ritlp< lschema_ritlp;
+  test-52: lschema_ritlp < lschema_ritlp;
+  test-53: lschema_ritlp<litlp_rschema;
+  test-54: lschema_ritlp <litlp_rschema;
+  test-55: lschema_ritlp< litlp_rschema;
+  test-56: lschema_ritlp < litlp_rschema;
+  test-57: litlp_rschema<litlp_rschema;
+  test-58: litlp_rschema <litlp_rschema;
+  test-59: litlp_rschema< litlp_rschema;
+  test-60: litlp_rschema < litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/input.scss
new file mode 100644
index 0000000000..f3eb437a91
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}<#{interpolant};
+  test-38: #{interpolant} <#{interpolant};
+  test-39: #{interpolant}< #{interpolant};
+  test-40: #{interpolant} < #{interpolant};
+  test-41: #{interpolant}<lschema_#{ritlp};
+  test-42: #{interpolant} <lschema_#{ritlp};
+  test-43: #{interpolant}< lschema_#{ritlp};
+  test-44: #{interpolant} < lschema_#{ritlp};
+  test-45: #{interpolant}<#{litlp}_rschema;
+  test-46: #{interpolant} <#{litlp}_rschema;
+  test-47: #{interpolant}< #{litlp}_rschema;
+  test-48: #{interpolant} < #{litlp}_rschema;
+  test-49: lschema_#{ritlp}<lschema_#{ritlp};
+  test-50: lschema_#{ritlp} <lschema_#{ritlp};
+  test-51: lschema_#{ritlp}< lschema_#{ritlp};
+  test-52: lschema_#{ritlp} < lschema_#{ritlp};
+  test-53: lschema_#{ritlp}<#{litlp}_rschema;
+  test-54: lschema_#{ritlp} <#{litlp}_rschema;
+  test-55: lschema_#{ritlp}< #{litlp}_rschema;
+  test-56: lschema_#{ritlp} < #{litlp}_rschema;
+  test-57: #{litlp}_rschema<#{litlp}_rschema;
+  test-58: #{litlp}_rschema <#{litlp}_rschema;
+  test-59: #{litlp}_rschema< #{litlp}_rschema;
+  test-60: #{litlp}_rschema < #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_lt/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/tripplets/input.scss
new file mode 100644
index 0000000000..427827ca89
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_lt/strings/tripplets/input.scss
@@ -0,0 +1,2 @@
+foo {
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/error
new file mode 100644
index 0000000000..221b825d90
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/error
@@ -0,0 +1,47 @@
+DEPRECATION WARNING on line 6 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 7 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 8 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 9 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 38 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 39 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 40 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 41 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 42 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 43 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 44 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 45 of /sass/sass-spec/spec/parser/operations/logic_ne/dimensions/pairs/input.scss:
+The result of `10px != 10` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compact.css
new file mode 100644
index 0000000000..b24aacd38c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: false; test-6: false; test-7: false; test-8: false; test-9: 10!=10px; test-10: 10 !=10px; test-11: 10!= 10px; test-12: 10 != 10px; test-13: true0px; test-14: true0px; test-15: true0px; test-16: true0px; test-17: falsepx; test-18: falsepx; test-19: falsepx; test-20: falsepx; test-21: falsepx; test-22: falsepx; test-23: falsepx; test-24: falsepx; test-25: false; test-26: false; test-27: false; test-28: false; test-29: 10px!=10px; test-30: 10px !=10px; test-31: 10px!= 10px; test-32: 10px != 10px; test-33: true0px; test-34: true0px; test-35: true0px; test-36: true0px; test-37: falsepx; test-38: falsepx; test-39: falsepx; test-40: falsepx; test-41: falsepx; test-42: falsepx; test-43: falsepx; test-44: falsepx; test-45: 10px!=10px; test-46: 10px !=10px; test-47: 10px!= 10px; test-48: 10px != 10px; test-49: 10true0px; test-50: 10true0px; test-51: 10true0px; test-52: 10true0px; test-53: 10truepx; test-54: 10truepx; test-55: 10truepx; test-56: 10truepx; test-57: 10truepx; test-58: 10truepx; test-59: 10truepx; test-60: 10truepx; test-61: 10true0px; test-62: 10true0px; test-63: 10true0px; test-64: 10true0px; test-65: 10truepx; test-66: 10truepx; test-67: 10truepx; test-68: 10truepx; test-69: 10truepx; test-70: 10truepx; test-71: 10truepx; test-72: 10truepx; test-73: 10px!=10px; test-74: 10px !=10px; test-75: 10px!= 10px; test-76: 10px != 10px; test-77: 10px!=10px; test-78: 10px !=10px; test-79: 10px!= 10px; test-80: 10px != 10px; test-81: 10ptruepx; test-82: 10ptruepx; test-83: 10ptruepx; test-84: 10ptruepx; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compressed.css
new file mode 100644
index 0000000000..0a28df904d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:false;test-6:false;test-7:false;test-8:false;test-9:10!=10px;test-10:10 !=10px;test-11:10!= 10px;test-12:10 != 10px;test-13:true0px;test-14:true0px;test-15:true0px;test-16:true0px;test-17:falsepx;test-18:falsepx;test-19:falsepx;test-20:falsepx;test-21:falsepx;test-22:falsepx;test-23:falsepx;test-24:falsepx;test-25:false;test-26:false;test-27:false;test-28:false;test-29:10px!=10px;test-30:10px !=10px;test-31:10px!= 10px;test-32:10px != 10px;test-33:true0px;test-34:true0px;test-35:true0px;test-36:true0px;test-37:falsepx;test-38:falsepx;test-39:falsepx;test-40:falsepx;test-41:falsepx;test-42:falsepx;test-43:falsepx;test-44:falsepx;test-45:10px!=10px;test-46:10px !=10px;test-47:10px!= 10px;test-48:10px != 10px;test-49:10true0px;test-50:10true0px;test-51:10true0px;test-52:10true0px;test-53:10truepx;test-54:10truepx;test-55:10truepx;test-56:10truepx;test-57:10truepx;test-58:10truepx;test-59:10truepx;test-60:10truepx;test-61:10true0px;test-62:10true0px;test-63:10true0px;test-64:10true0px;test-65:10truepx;test-66:10truepx;test-67:10truepx;test-68:10truepx;test-69:10truepx;test-70:10truepx;test-71:10truepx;test-72:10truepx;test-73:10px!=10px;test-74:10px !=10px;test-75:10px!= 10px;test-76:10px != 10px;test-77:10px!=10px;test-78:10px !=10px;test-79:10px!= 10px;test-80:10px != 10px;test-81:10ptruepx;test-82:10ptruepx;test-83:10ptruepx;test-84:10ptruepx}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.expanded.css
new file mode 100644
index 0000000000..56d880ec96
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected.expanded.css
@@ -0,0 +1,86 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: 10!=10px;
+  test-10: 10 !=10px;
+  test-11: 10!= 10px;
+  test-12: 10 != 10px;
+  test-13: true0px;
+  test-14: true0px;
+  test-15: true0px;
+  test-16: true0px;
+  test-17: falsepx;
+  test-18: falsepx;
+  test-19: falsepx;
+  test-20: falsepx;
+  test-21: falsepx;
+  test-22: falsepx;
+  test-23: falsepx;
+  test-24: falsepx;
+  test-25: false;
+  test-26: false;
+  test-27: false;
+  test-28: false;
+  test-29: 10px!=10px;
+  test-30: 10px !=10px;
+  test-31: 10px!= 10px;
+  test-32: 10px != 10px;
+  test-33: true0px;
+  test-34: true0px;
+  test-35: true0px;
+  test-36: true0px;
+  test-37: falsepx;
+  test-38: falsepx;
+  test-39: falsepx;
+  test-40: falsepx;
+  test-41: falsepx;
+  test-42: falsepx;
+  test-43: falsepx;
+  test-44: falsepx;
+  test-45: 10px!=10px;
+  test-46: 10px !=10px;
+  test-47: 10px!= 10px;
+  test-48: 10px != 10px;
+  test-49: 10true0px;
+  test-50: 10true0px;
+  test-51: 10true0px;
+  test-52: 10true0px;
+  test-53: 10truepx;
+  test-54: 10truepx;
+  test-55: 10truepx;
+  test-56: 10truepx;
+  test-57: 10truepx;
+  test-58: 10truepx;
+  test-59: 10truepx;
+  test-60: 10truepx;
+  test-61: 10true0px;
+  test-62: 10true0px;
+  test-63: 10true0px;
+  test-64: 10true0px;
+  test-65: 10truepx;
+  test-66: 10truepx;
+  test-67: 10truepx;
+  test-68: 10truepx;
+  test-69: 10truepx;
+  test-70: 10truepx;
+  test-71: 10truepx;
+  test-72: 10truepx;
+  test-73: 10px!=10px;
+  test-74: 10px !=10px;
+  test-75: 10px!= 10px;
+  test-76: 10px != 10px;
+  test-77: 10px!=10px;
+  test-78: 10px !=10px;
+  test-79: 10px!= 10px;
+  test-80: 10px != 10px;
+  test-81: 10ptruepx;
+  test-82: 10ptruepx;
+  test-83: 10ptruepx;
+  test-84: 10ptruepx;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..3eddb52076
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/expected_output.css
@@ -0,0 +1,85 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: 10!=10px;
+  test-10: 10 !=10px;
+  test-11: 10!= 10px;
+  test-12: 10 != 10px;
+  test-13: true0px;
+  test-14: true0px;
+  test-15: true0px;
+  test-16: true0px;
+  test-17: falsepx;
+  test-18: falsepx;
+  test-19: falsepx;
+  test-20: falsepx;
+  test-21: falsepx;
+  test-22: falsepx;
+  test-23: falsepx;
+  test-24: falsepx;
+  test-25: false;
+  test-26: false;
+  test-27: false;
+  test-28: false;
+  test-29: 10px!=10px;
+  test-30: 10px !=10px;
+  test-31: 10px!= 10px;
+  test-32: 10px != 10px;
+  test-33: true0px;
+  test-34: true0px;
+  test-35: true0px;
+  test-36: true0px;
+  test-37: falsepx;
+  test-38: falsepx;
+  test-39: falsepx;
+  test-40: falsepx;
+  test-41: falsepx;
+  test-42: falsepx;
+  test-43: falsepx;
+  test-44: falsepx;
+  test-45: 10px!=10px;
+  test-46: 10px !=10px;
+  test-47: 10px!= 10px;
+  test-48: 10px != 10px;
+  test-49: 10true0px;
+  test-50: 10true0px;
+  test-51: 10true0px;
+  test-52: 10true0px;
+  test-53: 10truepx;
+  test-54: 10truepx;
+  test-55: 10truepx;
+  test-56: 10truepx;
+  test-57: 10truepx;
+  test-58: 10truepx;
+  test-59: 10truepx;
+  test-60: 10truepx;
+  test-61: 10true0px;
+  test-62: 10true0px;
+  test-63: 10true0px;
+  test-64: 10true0px;
+  test-65: 10truepx;
+  test-66: 10truepx;
+  test-67: 10truepx;
+  test-68: 10truepx;
+  test-69: 10truepx;
+  test-70: 10truepx;
+  test-71: 10truepx;
+  test-72: 10truepx;
+  test-73: 10px!=10px;
+  test-74: 10px !=10px;
+  test-75: 10px!= 10px;
+  test-76: 10px != 10px;
+  test-77: 10px!=10px;
+  test-78: 10px !=10px;
+  test-79: 10px!= 10px;
+  test-80: 10px != 10px;
+  test-81: 10ptruepx;
+  test-82: 10ptruepx;
+  test-83: 10ptruepx;
+  test-84: 10ptruepx; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..a6f45e6289
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10!=10;
+  test-2: 10 !=10;
+  test-3: 10!= 10;
+  test-4: 10 != 10;
+  test-5: 10!=10px;
+  test-6: 10 !=10px;
+  test-7: 10!= 10px;
+  test-8: 10 != 10px;
+  test-9: 10!=#{10}px;
+  test-10: 10 !=#{10}px;
+  test-11: 10!= #{10}px;
+  test-12: 10 != #{10}px;
+  test-13: 10!=1#{0}px;
+  test-14: 10 !=1#{0}px;
+  test-15: 10!= 1#{0}px;
+  test-16: 10 != 1#{0}px;
+  test-17: 10!=10#{px};
+  test-18: 10 !=10#{px};
+  test-19: 10!= 10#{px};
+  test-20: 10 != 10#{px};
+  test-21: 10!=10#{p}x;
+  test-22: 10 !=10#{p}x;
+  test-23: 10!= 10#{p}x;
+  test-24: 10 != 10#{p}x;
+  test-25: 10px!=10px;
+  test-26: 10px !=10px;
+  test-27: 10px!= 10px;
+  test-28: 10px != 10px;
+  test-29: 10px!=#{10}px;
+  test-30: 10px !=#{10}px;
+  test-31: 10px!= #{10}px;
+  test-32: 10px != #{10}px;
+  test-33: 10px!=1#{0}px;
+  test-34: 10px !=1#{0}px;
+  test-35: 10px!= 1#{0}px;
+  test-36: 10px != 1#{0}px;
+  test-37: 10px!=10#{px};
+  test-38: 10px !=10#{px};
+  test-39: 10px!= 10#{px};
+  test-40: 10px != 10#{px};
+  test-41: 10px!=10#{p}x;
+  test-42: 10px !=10#{p}x;
+  test-43: 10px!= 10#{p}x;
+  test-44: 10px != 10#{p}x;
+  test-45: #{10}px!=#{10}px;
+  test-46: #{10}px !=#{10}px;
+  test-47: #{10}px!= #{10}px;
+  test-48: #{10}px != #{10}px;
+  test-49: #{10}px!=1#{0}px;
+  test-50: #{10}px !=1#{0}px;
+  test-51: #{10}px!= 1#{0}px;
+  test-52: #{10}px != 1#{0}px;
+  test-53: #{10}px!=10#{px};
+  test-54: #{10}px !=10#{px};
+  test-55: #{10}px!= 10#{px};
+  test-56: #{10}px != 10#{px};
+  test-57: #{10}px!=10#{p}x;
+  test-58: #{10}px !=10#{p}x;
+  test-59: #{10}px!= 10#{p}x;
+  test-60: #{10}px != 10#{p}x;
+  test-61: 1#{0}px!=1#{0}px;
+  test-62: 1#{0}px !=1#{0}px;
+  test-63: 1#{0}px!= 1#{0}px;
+  test-64: 1#{0}px != 1#{0}px;
+  test-65: 1#{0}px!=10#{px};
+  test-66: 1#{0}px !=10#{px};
+  test-67: 1#{0}px!= 10#{px};
+  test-68: 1#{0}px != 10#{px};
+  test-69: 1#{0}px!=10#{p}x;
+  test-70: 1#{0}px !=10#{p}x;
+  test-71: 1#{0}px!= 10#{p}x;
+  test-72: 1#{0}px != 10#{p}x;
+  test-73: 10#{px}!=10#{px};
+  test-74: 10#{px} !=10#{px};
+  test-75: 10#{px}!= 10#{px};
+  test-76: 10#{px} != 10#{px};
+  test-77: 10#{px}!=10#{p}x;
+  test-78: 10#{px} !=10#{p}x;
+  test-79: 10#{px}!= 10#{p}x;
+  test-80: 10#{px} != 10#{p}x;
+  test-81: 10#{p}x!=10#{p}x;
+  test-82: 10#{p}x !=10#{p}x;
+  test-83: 10#{p}x!= 10#{p}x;
+  test-84: 10#{p}x != 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..138de1ace4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10!=10!=10;
+  test-2: 10 !=10 !=10;
+  test-3: 10!= 10!= 10;
+  test-4: 10 != 10 != 10;
+  test-5: 10!=10!=10px;
+  test-6: 10 !=10 !=10px;
+  test-7: 10!= 10!= 10px;
+  test-8: 10 != 10 != 10px;
+  test-9: 10!=10!=#{10}px;
+  test-10: 10 !=10 !=#{10}px;
+  test-11: 10!= 10!= #{10}px;
+  test-12: 10 != 10 != #{10}px;
+  test-13: 10!=10!=1#{0}px;
+  test-14: 10 !=10 !=1#{0}px;
+  test-15: 10!= 10!= 1#{0}px;
+  test-16: 10 != 10 != 1#{0}px;
+  test-17: 10!=10!=10#{px};
+  test-18: 10 !=10 !=10#{px};
+  test-19: 10!= 10!= 10#{px};
+  test-20: 10 != 10 != 10#{px};
+  test-21: 10!=10!=10#{p}x;
+  test-22: 10 !=10 !=10#{p}x;
+  test-23: 10!= 10!= 10#{p}x;
+  test-24: 10 != 10 != 10#{p}x;
+  test-25: 10!=10px!=10px;
+  test-26: 10 !=10px !=10px;
+  test-27: 10!= 10px!= 10px;
+  test-28: 10 != 10px != 10px;
+  test-29: 10!=10px!=#{10}px;
+  test-30: 10 !=10px !=#{10}px;
+  test-31: 10!= 10px!= #{10}px;
+  test-32: 10 != 10px != #{10}px;
+  test-33: 10!=10px!=1#{0}px;
+  test-34: 10 !=10px !=1#{0}px;
+  test-35: 10!= 10px!= 1#{0}px;
+  test-36: 10 != 10px != 1#{0}px;
+  test-37: 10!=10px!=10#{px};
+  test-38: 10 !=10px !=10#{px};
+  test-39: 10!= 10px!= 10#{px};
+  test-40: 10 != 10px != 10#{px};
+  test-41: 10!=10px!=10#{p}x;
+  test-42: 10 !=10px !=10#{p}x;
+  test-43: 10!= 10px!= 10#{p}x;
+  test-44: 10 != 10px != 10#{p}x;
+  test-45: 10!=#{10}px!=#{10}px;
+  test-46: 10 !=#{10}px !=#{10}px;
+  test-47: 10!= #{10}px!= #{10}px;
+  test-48: 10 != #{10}px != #{10}px;
+  test-49: 10!=#{10}px!=1#{0}px;
+  test-50: 10 !=#{10}px !=1#{0}px;
+  test-51: 10!= #{10}px!= 1#{0}px;
+  test-52: 10 != #{10}px != 1#{0}px;
+  test-53: 10!=#{10}px!=10#{px};
+  test-54: 10 !=#{10}px !=10#{px};
+  test-55: 10!= #{10}px!= 10#{px};
+  test-56: 10 != #{10}px != 10#{px};
+  test-57: 10!=#{10}px!=10#{p}x;
+  test-58: 10 !=#{10}px !=10#{p}x;
+  test-59: 10!= #{10}px!= 10#{p}x;
+  test-60: 10 != #{10}px != 10#{p}x;
+  test-61: 10!=1#{0}px!=1#{0}px;
+  test-62: 10 !=1#{0}px !=1#{0}px;
+  test-63: 10!= 1#{0}px!= 1#{0}px;
+  test-64: 10 != 1#{0}px != 1#{0}px;
+  test-65: 10!=1#{0}px!=10#{px};
+  test-66: 10 !=1#{0}px !=10#{px};
+  test-67: 10!= 1#{0}px!= 10#{px};
+  test-68: 10 != 1#{0}px != 10#{px};
+  test-69: 10!=1#{0}px!=10#{p}x;
+  test-70: 10 !=1#{0}px !=10#{p}x;
+  test-71: 10!= 1#{0}px!= 10#{p}x;
+  test-72: 10 != 1#{0}px != 10#{p}x;
+  test-73: 10!=10#{px}!=10#{px};
+  test-74: 10 !=10#{px} !=10#{px};
+  test-75: 10!= 10#{px}!= 10#{px};
+  test-76: 10 != 10#{px} != 10#{px};
+  test-77: 10!=10#{px}!=10#{p}x;
+  test-78: 10 !=10#{px} !=10#{p}x;
+  test-79: 10!= 10#{px}!= 10#{p}x;
+  test-80: 10 != 10#{px} != 10#{p}x;
+  test-81: 10!=10#{p}x!=10#{p}x;
+  test-82: 10 !=10#{p}x !=10#{p}x;
+  test-83: 10!= 10#{p}x!= 10#{p}x;
+  test-84: 10 != 10#{p}x != 10#{p}x;
+  test-85: 10px!=10px!=10px;
+  test-86: 10px !=10px !=10px;
+  test-87: 10px!= 10px!= 10px;
+  test-88: 10px != 10px != 10px;
+  test-89: 10px!=10px!=#{10}px;
+  test-90: 10px !=10px !=#{10}px;
+  test-91: 10px!= 10px!= #{10}px;
+  test-92: 10px != 10px != #{10}px;
+  test-93: 10px!=10px!=1#{0}px;
+  test-94: 10px !=10px !=1#{0}px;
+  test-95: 10px!= 10px!= 1#{0}px;
+  test-96: 10px != 10px != 1#{0}px;
+  test-97: 10px!=10px!=10#{px};
+  test-98: 10px !=10px !=10#{px};
+  test-99: 10px!= 10px!= 10#{px};
+  test-100: 10px != 10px != 10#{px};
+  test-101: 10px!=10px!=10#{p}x;
+  test-102: 10px !=10px !=10#{p}x;
+  test-103: 10px!= 10px!= 10#{p}x;
+  test-104: 10px != 10px != 10#{p}x;
+  test-105: 10px!=#{10}px!=#{10}px;
+  test-106: 10px !=#{10}px !=#{10}px;
+  test-107: 10px!= #{10}px!= #{10}px;
+  test-108: 10px != #{10}px != #{10}px;
+  test-109: 10px!=#{10}px!=1#{0}px;
+  test-110: 10px !=#{10}px !=1#{0}px;
+  test-111: 10px!= #{10}px!= 1#{0}px;
+  test-112: 10px != #{10}px != 1#{0}px;
+  test-113: 10px!=#{10}px!=10#{px};
+  test-114: 10px !=#{10}px !=10#{px};
+  test-115: 10px!= #{10}px!= 10#{px};
+  test-116: 10px != #{10}px != 10#{px};
+  test-117: 10px!=#{10}px!=10#{p}x;
+  test-118: 10px !=#{10}px !=10#{p}x;
+  test-119: 10px!= #{10}px!= 10#{p}x;
+  test-120: 10px != #{10}px != 10#{p}x;
+  test-121: 10px!=1#{0}px!=1#{0}px;
+  test-122: 10px !=1#{0}px !=1#{0}px;
+  test-123: 10px!= 1#{0}px!= 1#{0}px;
+  test-124: 10px != 1#{0}px != 1#{0}px;
+  test-125: 10px!=1#{0}px!=10#{px};
+  test-126: 10px !=1#{0}px !=10#{px};
+  test-127: 10px!= 1#{0}px!= 10#{px};
+  test-128: 10px != 1#{0}px != 10#{px};
+  test-129: 10px!=1#{0}px!=10#{p}x;
+  test-130: 10px !=1#{0}px !=10#{p}x;
+  test-131: 10px!= 1#{0}px!= 10#{p}x;
+  test-132: 10px != 1#{0}px != 10#{p}x;
+  test-133: 10px!=10#{px}!=10#{px};
+  test-134: 10px !=10#{px} !=10#{px};
+  test-135: 10px!= 10#{px}!= 10#{px};
+  test-136: 10px != 10#{px} != 10#{px};
+  test-137: 10px!=10#{px}!=10#{p}x;
+  test-138: 10px !=10#{px} !=10#{p}x;
+  test-139: 10px!= 10#{px}!= 10#{p}x;
+  test-140: 10px != 10#{px} != 10#{p}x;
+  test-141: 10px!=10#{p}x!=10#{p}x;
+  test-142: 10px !=10#{p}x !=10#{p}x;
+  test-143: 10px!= 10#{p}x!= 10#{p}x;
+  test-144: 10px != 10#{p}x != 10#{p}x;
+  test-145: #{10}px!=#{10}px!=#{10}px;
+  test-146: #{10}px !=#{10}px !=#{10}px;
+  test-147: #{10}px!= #{10}px!= #{10}px;
+  test-148: #{10}px != #{10}px != #{10}px;
+  test-149: #{10}px!=#{10}px!=1#{0}px;
+  test-150: #{10}px !=#{10}px !=1#{0}px;
+  test-151: #{10}px!= #{10}px!= 1#{0}px;
+  test-152: #{10}px != #{10}px != 1#{0}px;
+  test-153: #{10}px!=#{10}px!=10#{px};
+  test-154: #{10}px !=#{10}px !=10#{px};
+  test-155: #{10}px!= #{10}px!= 10#{px};
+  test-156: #{10}px != #{10}px != 10#{px};
+  test-157: #{10}px!=#{10}px!=10#{p}x;
+  test-158: #{10}px !=#{10}px !=10#{p}x;
+  test-159: #{10}px!= #{10}px!= 10#{p}x;
+  test-160: #{10}px != #{10}px != 10#{p}x;
+  test-161: #{10}px!=1#{0}px!=1#{0}px;
+  test-162: #{10}px !=1#{0}px !=1#{0}px;
+  test-163: #{10}px!= 1#{0}px!= 1#{0}px;
+  test-164: #{10}px != 1#{0}px != 1#{0}px;
+  test-165: #{10}px!=1#{0}px!=10#{px};
+  test-166: #{10}px !=1#{0}px !=10#{px};
+  test-167: #{10}px!= 1#{0}px!= 10#{px};
+  test-168: #{10}px != 1#{0}px != 10#{px};
+  test-169: #{10}px!=1#{0}px!=10#{p}x;
+  test-170: #{10}px !=1#{0}px !=10#{p}x;
+  test-171: #{10}px!= 1#{0}px!= 10#{p}x;
+  test-172: #{10}px != 1#{0}px != 10#{p}x;
+  test-173: #{10}px!=10#{px}!=10#{px};
+  test-174: #{10}px !=10#{px} !=10#{px};
+  test-175: #{10}px!= 10#{px}!= 10#{px};
+  test-176: #{10}px != 10#{px} != 10#{px};
+  test-177: #{10}px!=10#{px}!=10#{p}x;
+  test-178: #{10}px !=10#{px} !=10#{p}x;
+  test-179: #{10}px!= 10#{px}!= 10#{p}x;
+  test-180: #{10}px != 10#{px} != 10#{p}x;
+  test-181: #{10}px!=10#{p}x!=10#{p}x;
+  test-182: #{10}px !=10#{p}x !=10#{p}x;
+  test-183: #{10}px!= 10#{p}x!= 10#{p}x;
+  test-184: #{10}px != 10#{p}x != 10#{p}x;
+  test-185: 1#{0}px!=1#{0}px!=1#{0}px;
+  test-186: 1#{0}px !=1#{0}px !=1#{0}px;
+  test-187: 1#{0}px!= 1#{0}px!= 1#{0}px;
+  test-188: 1#{0}px != 1#{0}px != 1#{0}px;
+  test-189: 1#{0}px!=1#{0}px!=10#{px};
+  test-190: 1#{0}px !=1#{0}px !=10#{px};
+  test-191: 1#{0}px!= 1#{0}px!= 10#{px};
+  test-192: 1#{0}px != 1#{0}px != 10#{px};
+  test-193: 1#{0}px!=1#{0}px!=10#{p}x;
+  test-194: 1#{0}px !=1#{0}px !=10#{p}x;
+  test-195: 1#{0}px!= 1#{0}px!= 10#{p}x;
+  test-196: 1#{0}px != 1#{0}px != 10#{p}x;
+  test-197: 1#{0}px!=10#{px}!=10#{px};
+  test-198: 1#{0}px !=10#{px} !=10#{px};
+  test-199: 1#{0}px!= 10#{px}!= 10#{px};
+  test-200: 1#{0}px != 10#{px} != 10#{px};
+  test-201: 1#{0}px!=10#{px}!=10#{p}x;
+  test-202: 1#{0}px !=10#{px} !=10#{p}x;
+  test-203: 1#{0}px!= 10#{px}!= 10#{p}x;
+  test-204: 1#{0}px != 10#{px} != 10#{p}x;
+  test-205: 1#{0}px!=10#{p}x!=10#{p}x;
+  test-206: 1#{0}px !=10#{p}x !=10#{p}x;
+  test-207: 1#{0}px!= 10#{p}x!= 10#{p}x;
+  test-208: 1#{0}px != 10#{p}x != 10#{p}x;
+  test-209: 10#{px}!=10#{px}!=10#{px};
+  test-210: 10#{px} !=10#{px} !=10#{px};
+  test-211: 10#{px}!= 10#{px}!= 10#{px};
+  test-212: 10#{px} != 10#{px} != 10#{px};
+  test-213: 10#{px}!=10#{px}!=10#{p}x;
+  test-214: 10#{px} !=10#{px} !=10#{p}x;
+  test-215: 10#{px}!= 10#{px}!= 10#{p}x;
+  test-216: 10#{px} != 10#{px} != 10#{p}x;
+  test-217: 10#{px}!=10#{p}x!=10#{p}x;
+  test-218: 10#{px} !=10#{p}x !=10#{p}x;
+  test-219: 10#{px}!= 10#{p}x!= 10#{p}x;
+  test-220: 10#{px} != 10#{p}x != 10#{p}x;
+  test-221: 10#{p}x!=10#{p}x!=10#{p}x;
+  test-222: 10#{p}x !=10#{p}x !=10#{p}x;
+  test-223: 10#{p}x!= 10#{p}x!= 10#{p}x;
+  test-224: 10#{p}x != 10#{p}x != 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/error
new file mode 100644
index 0000000000..244a4426b3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25!=#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/logic_ne/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/input.scss
new file mode 100644
index 0000000000..c18feab9cc
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25!=.25;
+  test-2: .25 !=.25;
+  test-3: .25!= .25;
+  test-4: .25 != .25;
+  test-5: .25!=-.25;
+  test-6: .25 !=-.25;
+  test-7: .25!= -.25;
+  test-8: .25 != -.25;
+  test-9: .25!=#{.25};
+  test-10: .25 !=#{.25};
+  test-11: .25!= #{.25};
+  test-12: .25 != #{.25};
+  test-13: .25!=#{-.25};
+  test-14: .25 !=#{-.25};
+  test-15: .25!= #{-.25};
+  test-16: .25 != #{-.25};
+  test-17: .25!=#{.}25;
+  test-18: .25 !=#{.}25;
+  test-19: .25!= #{.}25;
+  test-20: .25 != #{.}25;
+  test-21: -.25!=-.25;
+  test-22: -.25 !=-.25;
+  test-23: -.25!= -.25;
+  test-24: -.25 != -.25;
+  test-25: -.25!=#{.25};
+  test-26: -.25 !=#{.25};
+  test-27: -.25!= #{.25};
+  test-28: -.25 != #{.25};
+  test-29: -.25!=#{-.25};
+  test-30: -.25 !=#{-.25};
+  test-31: -.25!= #{-.25};
+  test-32: -.25 != #{-.25};
+  test-33: -.25!=#{.}25;
+  test-34: -.25 !=#{.}25;
+  test-35: -.25!= #{.}25;
+  test-36: -.25 != #{.}25;
+  test-37: #{.25}!=#{.25};
+  test-38: #{.25} !=#{.25};
+  test-39: #{.25}!= #{.25};
+  test-40: #{.25} != #{.25};
+  test-41: #{.25}!=#{-.25};
+  test-42: #{.25} !=#{-.25};
+  test-43: #{.25}!= #{-.25};
+  test-44: #{.25} != #{-.25};
+  test-45: #{.25}!=#{.}25;
+  test-46: #{.25} !=#{.}25;
+  test-47: #{.25}!= #{.}25;
+  test-48: #{.25} != #{.}25;
+  test-49: #{-.25}!=#{-.25};
+  test-50: #{-.25} !=#{-.25};
+  test-51: #{-.25}!= #{-.25};
+  test-52: #{-.25} != #{-.25};
+  test-53: #{-.25}!=#{.}25;
+  test-54: #{-.25} !=#{.}25;
+  test-55: #{-.25}!= #{.}25;
+  test-56: #{-.25} != #{.}25;
+  test-57: #{.}25!=#{.}25;
+  test-58: #{.}25 !=#{.}25;
+  test-59: #{.}25!= #{.}25;
+  test-60: #{.}25 != #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..62d29af30a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25!=.25!=.25;
+  test-2: .25 !=.25 !=.25;
+  test-3: .25!= .25!= .25;
+  test-4: .25 != .25 != .25;
+  test-5: .25!=.25!=-.25;
+  test-6: .25 !=.25 !=-.25;
+  test-7: .25!= .25!= -.25;
+  test-8: .25 != .25 != -.25;
+  test-9: .25!=.25!=#{.25};
+  test-10: .25 !=.25 !=#{.25};
+  test-11: .25!= .25!= #{.25};
+  test-12: .25 != .25 != #{.25};
+  test-13: .25!=.25!=#{-.25};
+  test-14: .25 !=.25 !=#{-.25};
+  test-15: .25!= .25!= #{-.25};
+  test-16: .25 != .25 != #{-.25};
+  test-17: .25!=.25!=#{.}25;
+  test-18: .25 !=.25 !=#{.}25;
+  test-19: .25!= .25!= #{.}25;
+  test-20: .25 != .25 != #{.}25;
+  test-21: .25!=-.25!=-.25;
+  test-22: .25 !=-.25 !=-.25;
+  test-23: .25!= -.25!= -.25;
+  test-24: .25 != -.25 != -.25;
+  test-25: .25!=-.25!=#{.25};
+  test-26: .25 !=-.25 !=#{.25};
+  test-27: .25!= -.25!= #{.25};
+  test-28: .25 != -.25 != #{.25};
+  test-29: .25!=-.25!=#{-.25};
+  test-30: .25 !=-.25 !=#{-.25};
+  test-31: .25!= -.25!= #{-.25};
+  test-32: .25 != -.25 != #{-.25};
+  test-33: .25!=-.25!=#{.}25;
+  test-34: .25 !=-.25 !=#{.}25;
+  test-35: .25!= -.25!= #{.}25;
+  test-36: .25 != -.25 != #{.}25;
+  test-37: .25!=#{.25}!=#{.25};
+  test-38: .25 !=#{.25} !=#{.25};
+  test-39: .25!= #{.25}!= #{.25};
+  test-40: .25 != #{.25} != #{.25};
+  test-41: .25!=#{.25}!=#{-.25};
+  test-42: .25 !=#{.25} !=#{-.25};
+  test-43: .25!= #{.25}!= #{-.25};
+  test-44: .25 != #{.25} != #{-.25};
+  test-45: .25!=#{.25}!=#{.}25;
+  test-46: .25 !=#{.25} !=#{.}25;
+  test-47: .25!= #{.25}!= #{.}25;
+  test-48: .25 != #{.25} != #{.}25;
+  test-49: .25!=#{-.25}!=#{-.25};
+  test-50: .25 !=#{-.25} !=#{-.25};
+  test-51: .25!= #{-.25}!= #{-.25};
+  test-52: .25 != #{-.25} != #{-.25};
+  test-53: .25!=#{-.25}!=#{.}25;
+  test-54: .25 !=#{-.25} !=#{.}25;
+  test-55: .25!= #{-.25}!= #{.}25;
+  test-56: .25 != #{-.25} != #{.}25;
+  test-57: .25!=#{.}25!=#{.}25;
+  test-58: .25 !=#{.}25 !=#{.}25;
+  test-59: .25!= #{.}25!= #{.}25;
+  test-60: .25 != #{.}25 != #{.}25;
+  test-61: -.25!=-.25!=-.25;
+  test-62: -.25 !=-.25 !=-.25;
+  test-63: -.25!= -.25!= -.25;
+  test-64: -.25 != -.25 != -.25;
+  test-65: -.25!=-.25!=#{.25};
+  test-66: -.25 !=-.25 !=#{.25};
+  test-67: -.25!= -.25!= #{.25};
+  test-68: -.25 != -.25 != #{.25};
+  test-69: -.25!=-.25!=#{-.25};
+  test-70: -.25 !=-.25 !=#{-.25};
+  test-71: -.25!= -.25!= #{-.25};
+  test-72: -.25 != -.25 != #{-.25};
+  test-73: -.25!=-.25!=#{.}25;
+  test-74: -.25 !=-.25 !=#{.}25;
+  test-75: -.25!= -.25!= #{.}25;
+  test-76: -.25 != -.25 != #{.}25;
+  test-77: -.25!=#{.25}!=#{.25};
+  test-78: -.25 !=#{.25} !=#{.25};
+  test-79: -.25!= #{.25}!= #{.25};
+  test-80: -.25 != #{.25} != #{.25};
+  test-81: -.25!=#{.25}!=#{-.25};
+  test-82: -.25 !=#{.25} !=#{-.25};
+  test-83: -.25!= #{.25}!= #{-.25};
+  test-84: -.25 != #{.25} != #{-.25};
+  test-85: -.25!=#{.25}!=#{.}25;
+  test-86: -.25 !=#{.25} !=#{.}25;
+  test-87: -.25!= #{.25}!= #{.}25;
+  test-88: -.25 != #{.25} != #{.}25;
+  test-89: -.25!=#{-.25}!=#{-.25};
+  test-90: -.25 !=#{-.25} !=#{-.25};
+  test-91: -.25!= #{-.25}!= #{-.25};
+  test-92: -.25 != #{-.25} != #{-.25};
+  test-93: -.25!=#{-.25}!=#{.}25;
+  test-94: -.25 !=#{-.25} !=#{.}25;
+  test-95: -.25!= #{-.25}!= #{.}25;
+  test-96: -.25 != #{-.25} != #{.}25;
+  test-97: -.25!=#{.}25!=#{.}25;
+  test-98: -.25 !=#{.}25 !=#{.}25;
+  test-99: -.25!= #{.}25!= #{.}25;
+  test-100: -.25 != #{.}25 != #{.}25;
+  test-101: #{.25}!=#{.25}!=#{.25};
+  test-102: #{.25} !=#{.25} !=#{.25};
+  test-103: #{.25}!= #{.25}!= #{.25};
+  test-104: #{.25} != #{.25} != #{.25};
+  test-105: #{.25}!=#{.25}!=#{-.25};
+  test-106: #{.25} !=#{.25} !=#{-.25};
+  test-107: #{.25}!= #{.25}!= #{-.25};
+  test-108: #{.25} != #{.25} != #{-.25};
+  test-109: #{.25}!=#{.25}!=#{.}25;
+  test-110: #{.25} !=#{.25} !=#{.}25;
+  test-111: #{.25}!= #{.25}!= #{.}25;
+  test-112: #{.25} != #{.25} != #{.}25;
+  test-113: #{.25}!=#{-.25}!=#{-.25};
+  test-114: #{.25} !=#{-.25} !=#{-.25};
+  test-115: #{.25}!= #{-.25}!= #{-.25};
+  test-116: #{.25} != #{-.25} != #{-.25};
+  test-117: #{.25}!=#{-.25}!=#{.}25;
+  test-118: #{.25} !=#{-.25} !=#{.}25;
+  test-119: #{.25}!= #{-.25}!= #{.}25;
+  test-120: #{.25} != #{-.25} != #{.}25;
+  test-121: #{.25}!=#{.}25!=#{.}25;
+  test-122: #{.25} !=#{.}25 !=#{.}25;
+  test-123: #{.25}!= #{.}25!= #{.}25;
+  test-124: #{.25} != #{.}25 != #{.}25;
+  test-125: #{-.25}!=#{-.25}!=#{-.25};
+  test-126: #{-.25} !=#{-.25} !=#{-.25};
+  test-127: #{-.25}!= #{-.25}!= #{-.25};
+  test-128: #{-.25} != #{-.25} != #{-.25};
+  test-129: #{-.25}!=#{-.25}!=#{.}25;
+  test-130: #{-.25} !=#{-.25} !=#{.}25;
+  test-131: #{-.25}!= #{-.25}!= #{.}25;
+  test-132: #{-.25} != #{-.25} != #{.}25;
+  test-133: #{-.25}!=#{.}25!=#{.}25;
+  test-134: #{-.25} !=#{.}25 !=#{.}25;
+  test-135: #{-.25}!= #{.}25!= #{.}25;
+  test-136: #{-.25} != #{.}25 != #{.}25;
+  test-137: #{.}25!=#{.}25!=#{.}25;
+  test-138: #{.}25 !=#{.}25 !=#{.}25;
+  test-139: #{.}25!= #{.}25!= #{.}25;
+  test-140: #{.}25 != #{.}25 != #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/error
new file mode 100644
index 0000000000..f6a63cfde6
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/error
@@ -0,0 +1,31 @@
+DEPRECATION WARNING on line 6 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10%` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 7 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10%` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 8 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10%` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 9 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10%` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 10 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 11 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 12 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
+
+DEPRECATION WARNING on line 13 of /sass/sass-spec/spec/parser/operations/logic_ne/mixed/pairs/input.scss:
+The result of `10 != 10px` will be `true` in future releases of Sass.
+Unitless numbers will no longer be equal to the same numbers with units.
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compact.css
new file mode 100644
index 0000000000..4388b3a88d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: false; test-6: false; test-7: false; test-8: false; test-9: false; test-10: false; test-11: false; test-12: false; test-13: true; test-14: true; test-15: true; test-16: true; test-17: 10!=itpl; test-18: 10 !=itpl; test-19: 10!= itpl; test-20: 10 != itpl; test-21: false; test-22: false; test-23: false; test-24: false; test-25: true; test-26: true; test-27: true; test-28: true; test-29: true; test-30: true; test-31: true; test-32: true; test-33: 10%!=itpl; test-34: 10% !=itpl; test-35: 10%!= itpl; test-36: 10% != itpl; test-37: false; test-38: false; test-39: false; test-40: false; test-41: true; test-42: true; test-43: true; test-44: true; test-45: 10px!=itpl; test-46: 10px !=itpl; test-47: 10px!= itpl; test-48: 10px != itpl; test-49: false; test-50: false; test-51: false; test-52: false; test-53: #AAA!=itpl; test-54: #AAA !=itpl; test-55: #AAA!= itpl; test-56: #AAA != itpl; test-57: itpl!=itpl; test-58: itpl !=itpl; test-59: itpl!= itpl; test-60: itpl != itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compressed.css
new file mode 100644
index 0000000000..c7f5eaa27b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:false;test-6:false;test-7:false;test-8:false;test-9:false;test-10:false;test-11:false;test-12:false;test-13:true;test-14:true;test-15:true;test-16:true;test-17:10!=itpl;test-18:10 !=itpl;test-19:10!= itpl;test-20:10 != itpl;test-21:false;test-22:false;test-23:false;test-24:false;test-25:true;test-26:true;test-27:true;test-28:true;test-29:true;test-30:true;test-31:true;test-32:true;test-33:10%!=itpl;test-34:10% !=itpl;test-35:10%!= itpl;test-36:10% != itpl;test-37:false;test-38:false;test-39:false;test-40:false;test-41:true;test-42:true;test-43:true;test-44:true;test-45:10px!=itpl;test-46:10px !=itpl;test-47:10px!= itpl;test-48:10px != itpl;test-49:false;test-50:false;test-51:false;test-52:false;test-53:#AAA!=itpl;test-54:#AAA !=itpl;test-55:#AAA!= itpl;test-56:#AAA != itpl;test-57:itpl!=itpl;test-58:itpl !=itpl;test-59:itpl!= itpl;test-60:itpl != itpl}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.expanded.css
new file mode 100644
index 0000000000..4ca45e7dd6
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: false;
+  test-10: false;
+  test-11: false;
+  test-12: false;
+  test-13: true;
+  test-14: true;
+  test-15: true;
+  test-16: true;
+  test-17: 10!=itpl;
+  test-18: 10 !=itpl;
+  test-19: 10!= itpl;
+  test-20: 10 != itpl;
+  test-21: false;
+  test-22: false;
+  test-23: false;
+  test-24: false;
+  test-25: true;
+  test-26: true;
+  test-27: true;
+  test-28: true;
+  test-29: true;
+  test-30: true;
+  test-31: true;
+  test-32: true;
+  test-33: 10%!=itpl;
+  test-34: 10% !=itpl;
+  test-35: 10%!= itpl;
+  test-36: 10% != itpl;
+  test-37: false;
+  test-38: false;
+  test-39: false;
+  test-40: false;
+  test-41: true;
+  test-42: true;
+  test-43: true;
+  test-44: true;
+  test-45: 10px!=itpl;
+  test-46: 10px !=itpl;
+  test-47: 10px!= itpl;
+  test-48: 10px != itpl;
+  test-49: false;
+  test-50: false;
+  test-51: false;
+  test-52: false;
+  test-53: #AAA!=itpl;
+  test-54: #AAA !=itpl;
+  test-55: #AAA!= itpl;
+  test-56: #AAA != itpl;
+  test-57: itpl!=itpl;
+  test-58: itpl !=itpl;
+  test-59: itpl!= itpl;
+  test-60: itpl != itpl;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..2c4ade6035
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: false;
+  test-6: false;
+  test-7: false;
+  test-8: false;
+  test-9: false;
+  test-10: false;
+  test-11: false;
+  test-12: false;
+  test-13: true;
+  test-14: true;
+  test-15: true;
+  test-16: true;
+  test-17: 10!=itpl;
+  test-18: 10 !=itpl;
+  test-19: 10!= itpl;
+  test-20: 10 != itpl;
+  test-21: false;
+  test-22: false;
+  test-23: false;
+  test-24: false;
+  test-25: true;
+  test-26: true;
+  test-27: true;
+  test-28: true;
+  test-29: true;
+  test-30: true;
+  test-31: true;
+  test-32: true;
+  test-33: 10%!=itpl;
+  test-34: 10% !=itpl;
+  test-35: 10%!= itpl;
+  test-36: 10% != itpl;
+  test-37: false;
+  test-38: false;
+  test-39: false;
+  test-40: false;
+  test-41: true;
+  test-42: true;
+  test-43: true;
+  test-44: true;
+  test-45: 10px!=itpl;
+  test-46: 10px !=itpl;
+  test-47: 10px!= itpl;
+  test-48: 10px != itpl;
+  test-49: false;
+  test-50: false;
+  test-51: false;
+  test-52: false;
+  test-53: #AAA!=itpl;
+  test-54: #AAA !=itpl;
+  test-55: #AAA!= itpl;
+  test-56: #AAA != itpl;
+  test-57: itpl!=itpl;
+  test-58: itpl !=itpl;
+  test-59: itpl!= itpl;
+  test-60: itpl != itpl; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/input.scss
new file mode 100644
index 0000000000..fea41b783b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10!=10;
+  test-2: 10 !=10;
+  test-3: 10!= 10;
+  test-4: 10 != 10;
+  test-5: 10!=10%;
+  test-6: 10 !=10%;
+  test-7: 10!= 10%;
+  test-8: 10 != 10%;
+  test-9: 10!=10px;
+  test-10: 10 !=10px;
+  test-11: 10!= 10px;
+  test-12: 10 != 10px;
+  test-13: 10!=#AAA;
+  test-14: 10 !=#AAA;
+  test-15: 10!= #AAA;
+  test-16: 10 != #AAA;
+  test-17: 10!=#{itpl};
+  test-18: 10 !=#{itpl};
+  test-19: 10!= #{itpl};
+  test-20: 10 != #{itpl};
+  test-21: 10%!=10%;
+  test-22: 10% !=10%;
+  test-23: 10%!= 10%;
+  test-24: 10% != 10%;
+  test-25: 10%!=10px;
+  test-26: 10% !=10px;
+  test-27: 10%!= 10px;
+  test-28: 10% != 10px;
+  test-29: 10%!=#AAA;
+  test-30: 10% !=#AAA;
+  test-31: 10%!= #AAA;
+  test-32: 10% != #AAA;
+  test-33: 10%!=#{itpl};
+  test-34: 10% !=#{itpl};
+  test-35: 10%!= #{itpl};
+  test-36: 10% != #{itpl};
+  test-37: 10px!=10px;
+  test-38: 10px !=10px;
+  test-39: 10px!= 10px;
+  test-40: 10px != 10px;
+  test-41: 10px!=#AAA;
+  test-42: 10px !=#AAA;
+  test-43: 10px!= #AAA;
+  test-44: 10px != #AAA;
+  test-45: 10px!=#{itpl};
+  test-46: 10px !=#{itpl};
+  test-47: 10px!= #{itpl};
+  test-48: 10px != #{itpl};
+  test-49: #AAA!=#AAA;
+  test-50: #AAA !=#AAA;
+  test-51: #AAA!= #AAA;
+  test-52: #AAA != #AAA;
+  test-53: #AAA!=#{itpl};
+  test-54: #AAA !=#{itpl};
+  test-55: #AAA!= #{itpl};
+  test-56: #AAA != #{itpl};
+  test-57: #{itpl}!=#{itpl};
+  test-58: #{itpl} !=#{itpl};
+  test-59: #{itpl}!= #{itpl};
+  test-60: #{itpl} != #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..b4d8017a9f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10!=10!=10;
+  test-2: 10 !=10 !=10;
+  test-3: 10!= 10!= 10;
+  test-4: 10 != 10 != 10;
+  test-5: 10!=10!=10%;
+  test-6: 10 !=10 !=10%;
+  test-7: 10!= 10!= 10%;
+  test-8: 10 != 10 != 10%;
+  test-9: 10!=10!=10px;
+  test-10: 10 !=10 !=10px;
+  test-11: 10!= 10!= 10px;
+  test-12: 10 != 10 != 10px;
+  test-13: 10!=10!=#AAA;
+  test-14: 10 !=10 !=#AAA;
+  test-15: 10!= 10!= #AAA;
+  test-16: 10 != 10 != #AAA;
+  test-17: 10!=10!=#{itpl};
+  test-18: 10 !=10 !=#{itpl};
+  test-19: 10!= 10!= #{itpl};
+  test-20: 10 != 10 != #{itpl};
+  test-21: 10!=10%!=10%;
+  test-22: 10 !=10% !=10%;
+  test-23: 10!= 10%!= 10%;
+  test-24: 10 != 10% != 10%;
+  test-25: 10!=10%!=10px;
+  test-26: 10 !=10% !=10px;
+  test-27: 10!= 10%!= 10px;
+  test-28: 10 != 10% != 10px;
+  test-29: 10!=10%!=#AAA;
+  test-30: 10 !=10% !=#AAA;
+  test-31: 10!= 10%!= #AAA;
+  test-32: 10 != 10% != #AAA;
+  test-33: 10!=10%!=#{itpl};
+  test-34: 10 !=10% !=#{itpl};
+  test-35: 10!= 10%!= #{itpl};
+  test-36: 10 != 10% != #{itpl};
+  test-37: 10!=10px!=10px;
+  test-38: 10 !=10px !=10px;
+  test-39: 10!= 10px!= 10px;
+  test-40: 10 != 10px != 10px;
+  test-41: 10!=10px!=#AAA;
+  test-42: 10 !=10px !=#AAA;
+  test-43: 10!= 10px!= #AAA;
+  test-44: 10 != 10px != #AAA;
+  test-45: 10!=10px!=#{itpl};
+  test-46: 10 !=10px !=#{itpl};
+  test-47: 10!= 10px!= #{itpl};
+  test-48: 10 != 10px != #{itpl};
+  test-49: 10!=#AAA!=#AAA;
+  test-50: 10 !=#AAA !=#AAA;
+  test-51: 10!= #AAA!= #AAA;
+  test-52: 10 != #AAA != #AAA;
+  test-53: 10!=#AAA!=#{itpl};
+  test-54: 10 !=#AAA !=#{itpl};
+  test-55: 10!= #AAA!= #{itpl};
+  test-56: 10 != #AAA != #{itpl};
+  test-57: 10!=#{itpl}!=#{itpl};
+  test-58: 10 !=#{itpl} !=#{itpl};
+  test-59: 10!= #{itpl}!= #{itpl};
+  test-60: 10 != #{itpl} != #{itpl};
+  test-61: 10%!=10%!=10%;
+  test-62: 10% !=10% !=10%;
+  test-63: 10%!= 10%!= 10%;
+  test-64: 10% != 10% != 10%;
+  test-65: 10%!=10%!=10px;
+  test-66: 10% !=10% !=10px;
+  test-67: 10%!= 10%!= 10px;
+  test-68: 10% != 10% != 10px;
+  test-69: 10%!=10%!=#AAA;
+  test-70: 10% !=10% !=#AAA;
+  test-71: 10%!= 10%!= #AAA;
+  test-72: 10% != 10% != #AAA;
+  test-73: 10%!=10%!=#{itpl};
+  test-74: 10% !=10% !=#{itpl};
+  test-75: 10%!= 10%!= #{itpl};
+  test-76: 10% != 10% != #{itpl};
+  test-77: 10%!=10px!=10px;
+  test-78: 10% !=10px !=10px;
+  test-79: 10%!= 10px!= 10px;
+  test-80: 10% != 10px != 10px;
+  test-81: 10%!=10px!=#AAA;
+  test-82: 10% !=10px !=#AAA;
+  test-83: 10%!= 10px!= #AAA;
+  test-84: 10% != 10px != #AAA;
+  test-85: 10%!=10px!=#{itpl};
+  test-86: 10% !=10px !=#{itpl};
+  test-87: 10%!= 10px!= #{itpl};
+  test-88: 10% != 10px != #{itpl};
+  test-89: 10%!=#AAA!=#AAA;
+  test-90: 10% !=#AAA !=#AAA;
+  test-91: 10%!= #AAA!= #AAA;
+  test-92: 10% != #AAA != #AAA;
+  test-93: 10%!=#AAA!=#{itpl};
+  test-94: 10% !=#AAA !=#{itpl};
+  test-95: 10%!= #AAA!= #{itpl};
+  test-96: 10% != #AAA != #{itpl};
+  test-97: 10%!=#{itpl}!=#{itpl};
+  test-98: 10% !=#{itpl} !=#{itpl};
+  test-99: 10%!= #{itpl}!= #{itpl};
+  test-100: 10% != #{itpl} != #{itpl};
+  test-101: 10px!=10px!=10px;
+  test-102: 10px !=10px !=10px;
+  test-103: 10px!= 10px!= 10px;
+  test-104: 10px != 10px != 10px;
+  test-105: 10px!=10px!=#AAA;
+  test-106: 10px !=10px !=#AAA;
+  test-107: 10px!= 10px!= #AAA;
+  test-108: 10px != 10px != #AAA;
+  test-109: 10px!=10px!=#{itpl};
+  test-110: 10px !=10px !=#{itpl};
+  test-111: 10px!= 10px!= #{itpl};
+  test-112: 10px != 10px != #{itpl};
+  test-113: 10px!=#AAA!=#AAA;
+  test-114: 10px !=#AAA !=#AAA;
+  test-115: 10px!= #AAA!= #AAA;
+  test-116: 10px != #AAA != #AAA;
+  test-117: 10px!=#AAA!=#{itpl};
+  test-118: 10px !=#AAA !=#{itpl};
+  test-119: 10px!= #AAA!= #{itpl};
+  test-120: 10px != #AAA != #{itpl};
+  test-121: 10px!=#{itpl}!=#{itpl};
+  test-122: 10px !=#{itpl} !=#{itpl};
+  test-123: 10px!= #{itpl}!= #{itpl};
+  test-124: 10px != #{itpl} != #{itpl};
+  test-125: #AAA!=#AAA!=#AAA;
+  test-126: #AAA !=#AAA !=#AAA;
+  test-127: #AAA!= #AAA!= #AAA;
+  test-128: #AAA != #AAA != #AAA;
+  test-129: #AAA!=#AAA!=#{itpl};
+  test-130: #AAA !=#AAA !=#{itpl};
+  test-131: #AAA!= #AAA!= #{itpl};
+  test-132: #AAA != #AAA != #{itpl};
+  test-133: #AAA!=#{itpl}!=#{itpl};
+  test-134: #AAA !=#{itpl} !=#{itpl};
+  test-135: #AAA!= #{itpl}!= #{itpl};
+  test-136: #AAA != #{itpl} != #{itpl};
+  test-137: #{itpl}!=#{itpl}!=#{itpl};
+  test-138: #{itpl} !=#{itpl} !=#{itpl};
+  test-139: #{itpl}!= #{itpl}!= #{itpl};
+  test-140: #{itpl} != #{itpl} != #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..802c0cee74
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: 10!=10; test-6: 10 !=10; test-7: 10!= 10; test-8: 10 != 10; test-9: true0; test-10: true0; test-11: true0; test-12: true0; test-13: 10!=10; test-14: 10 !=10; test-15: 10!= 10; test-16: 10 != 10; test-17: 10!=10; test-18: 10 !=10; test-19: 10!= 10; test-20: 10 != 10; test-21: 10!=10; test-22: 10 !=10; test-23: 10!= 10; test-24: 10 != 10; test-25: 10!=10; test-26: 10 !=10; test-27: 10!= 10; test-28: 10 != 10; test-29: 10!=10; test-30: 10 !=10; test-31: 10!= 10; test-32: 10 != 10; test-33: 10!=10; test-34: 10 !=10; test-35: 10!= 10; test-36: 10 != 10; test-37: 10!=10; test-38: 10 !=10; test-39: 10!= 10; test-40: 10 != 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..0f944887ea
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:10!=10;test-6:10 !=10;test-7:10!= 10;test-8:10 != 10;test-9:true0;test-10:true0;test-11:true0;test-12:true0;test-13:10!=10;test-14:10 !=10;test-15:10!= 10;test-16:10 != 10;test-17:10!=10;test-18:10 !=10;test-19:10!= 10;test-20:10 != 10;test-21:10!=10;test-22:10 !=10;test-23:10!= 10;test-24:10 != 10;test-25:10!=10;test-26:10 !=10;test-27:10!= 10;test-28:10 != 10;test-29:10!=10;test-30:10 !=10;test-31:10!= 10;test-32:10 != 10;test-33:10!=10;test-34:10 !=10;test-35:10!= 10;test-36:10 != 10;test-37:10!=10;test-38:10 !=10;test-39:10!= 10;test-40:10 != 10}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..327e16a9d4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10!=10;
+  test-6: 10 !=10;
+  test-7: 10!= 10;
+  test-8: 10 != 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10!=10;
+  test-14: 10 !=10;
+  test-15: 10!= 10;
+  test-16: 10 != 10;
+  test-17: 10!=10;
+  test-18: 10 !=10;
+  test-19: 10!= 10;
+  test-20: 10 != 10;
+  test-21: 10!=10;
+  test-22: 10 !=10;
+  test-23: 10!= 10;
+  test-24: 10 != 10;
+  test-25: 10!=10;
+  test-26: 10 !=10;
+  test-27: 10!= 10;
+  test-28: 10 != 10;
+  test-29: 10!=10;
+  test-30: 10 !=10;
+  test-31: 10!= 10;
+  test-32: 10 != 10;
+  test-33: 10!=10;
+  test-34: 10 !=10;
+  test-35: 10!= 10;
+  test-36: 10 != 10;
+  test-37: 10!=10;
+  test-38: 10 !=10;
+  test-39: 10!= 10;
+  test-40: 10 != 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..b746dc99c0
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: 10!=10;
+  test-6: 10 !=10;
+  test-7: 10!= 10;
+  test-8: 10 != 10;
+  test-9: true0;
+  test-10: true0;
+  test-11: true0;
+  test-12: true0;
+  test-13: 10!=10;
+  test-14: 10 !=10;
+  test-15: 10!= 10;
+  test-16: 10 != 10;
+  test-17: 10!=10;
+  test-18: 10 !=10;
+  test-19: 10!= 10;
+  test-20: 10 != 10;
+  test-21: 10!=10;
+  test-22: 10 !=10;
+  test-23: 10!= 10;
+  test-24: 10 != 10;
+  test-25: 10!=10;
+  test-26: 10 !=10;
+  test-27: 10!= 10;
+  test-28: 10 != 10;
+  test-29: 10!=10;
+  test-30: 10 !=10;
+  test-31: 10!= 10;
+  test-32: 10 != 10;
+  test-33: 10!=10;
+  test-34: 10 !=10;
+  test-35: 10!= 10;
+  test-36: 10 != 10;
+  test-37: 10!=10;
+  test-38: 10 !=10;
+  test-39: 10!= 10;
+  test-40: 10 != 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/input.scss
new file mode 100644
index 0000000000..194259f97b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10!=10;
+  test-2: 10 !=10;
+  test-3: 10!= 10;
+  test-4: 10 != 10;
+  test-5: 10!=#{10};
+  test-6: 10 !=#{10};
+  test-7: 10!= #{10};
+  test-8: 10 != #{10};
+  test-9: 10!=1#{0};
+  test-10: 10 !=1#{0};
+  test-11: 10!= 1#{0};
+  test-12: 10 != 1#{0};
+  test-13: 10!=#{1}0;
+  test-14: 10 !=#{1}0;
+  test-15: 10!= #{1}0;
+  test-16: 10 != #{1}0;
+  test-17: #{10}!=#{10};
+  test-18: #{10} !=#{10};
+  test-19: #{10}!= #{10};
+  test-20: #{10} != #{10};
+  test-21: #{10}!=1#{0};
+  test-22: #{10} !=1#{0};
+  test-23: #{10}!= 1#{0};
+  test-24: #{10} != 1#{0};
+  test-25: #{10}!=#{1}0;
+  test-26: #{10} !=#{1}0;
+  test-27: #{10}!= #{1}0;
+  test-28: #{10} != #{1}0;
+  test-29: 1#{0}!=1#{0};
+  test-30: 1#{0} !=1#{0};
+  test-31: 1#{0}!= 1#{0};
+  test-32: 1#{0} != 1#{0};
+  test-33: 1#{0}!=#{1}0;
+  test-34: 1#{0} !=#{1}0;
+  test-35: 1#{0}!= #{1}0;
+  test-36: 1#{0} != #{1}0;
+  test-37: #{1}0!=#{1}0;
+  test-38: #{1}0 !=#{1}0;
+  test-39: #{1}0!= #{1}0;
+  test-40: #{1}0 != #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..5a4a88f8ff
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10!=10!=10;
+  test-2: 10 !=10 !=10;
+  test-3: 10!= 10!= 10;
+  test-4: 10 != 10 != 10;
+  test-5: 10!=10!=#{10};
+  test-6: 10 !=10 !=#{10};
+  test-7: 10!= 10!= #{10};
+  test-8: 10 != 10 != #{10};
+  test-9: 10!=10!=1#{0};
+  test-10: 10 !=10 !=1#{0};
+  test-11: 10!= 10!= 1#{0};
+  test-12: 10 != 10 != 1#{0};
+  test-13: 10!=10!=#{1}0;
+  test-14: 10 !=10 !=#{1}0;
+  test-15: 10!= 10!= #{1}0;
+  test-16: 10 != 10 != #{1}0;
+  test-17: 10!=#{10}!=#{10};
+  test-18: 10 !=#{10} !=#{10};
+  test-19: 10!= #{10}!= #{10};
+  test-20: 10 != #{10} != #{10};
+  test-21: 10!=#{10}!=1#{0};
+  test-22: 10 !=#{10} !=1#{0};
+  test-23: 10!= #{10}!= 1#{0};
+  test-24: 10 != #{10} != 1#{0};
+  test-25: 10!=#{10}!=#{1}0;
+  test-26: 10 !=#{10} !=#{1}0;
+  test-27: 10!= #{10}!= #{1}0;
+  test-28: 10 != #{10} != #{1}0;
+  test-29: 10!=1#{0}!=1#{0};
+  test-30: 10 !=1#{0} !=1#{0};
+  test-31: 10!= 1#{0}!= 1#{0};
+  test-32: 10 != 1#{0} != 1#{0};
+  test-33: 10!=1#{0}!=#{1}0;
+  test-34: 10 !=1#{0} !=#{1}0;
+  test-35: 10!= 1#{0}!= #{1}0;
+  test-36: 10 != 1#{0} != #{1}0;
+  test-37: 10!=#{1}0!=#{1}0;
+  test-38: 10 !=#{1}0 !=#{1}0;
+  test-39: 10!= #{1}0!= #{1}0;
+  test-40: 10 != #{1}0 != #{1}0;
+  test-41: #{10}!=#{10}!=#{10};
+  test-42: #{10} !=#{10} !=#{10};
+  test-43: #{10}!= #{10}!= #{10};
+  test-44: #{10} != #{10} != #{10};
+  test-45: #{10}!=#{10}!=1#{0};
+  test-46: #{10} !=#{10} !=1#{0};
+  test-47: #{10}!= #{10}!= 1#{0};
+  test-48: #{10} != #{10} != 1#{0};
+  test-49: #{10}!=#{10}!=#{1}0;
+  test-50: #{10} !=#{10} !=#{1}0;
+  test-51: #{10}!= #{10}!= #{1}0;
+  test-52: #{10} != #{10} != #{1}0;
+  test-53: #{10}!=1#{0}!=1#{0};
+  test-54: #{10} !=1#{0} !=1#{0};
+  test-55: #{10}!= 1#{0}!= 1#{0};
+  test-56: #{10} != 1#{0} != 1#{0};
+  test-57: #{10}!=1#{0}!=#{1}0;
+  test-58: #{10} !=1#{0} !=#{1}0;
+  test-59: #{10}!= 1#{0}!= #{1}0;
+  test-60: #{10} != 1#{0} != #{1}0;
+  test-61: #{10}!=#{1}0!=#{1}0;
+  test-62: #{10} !=#{1}0 !=#{1}0;
+  test-63: #{10}!= #{1}0!= #{1}0;
+  test-64: #{10} != #{1}0 != #{1}0;
+  test-65: 1#{0}!=1#{0}!=1#{0};
+  test-66: 1#{0} !=1#{0} !=1#{0};
+  test-67: 1#{0}!= 1#{0}!= 1#{0};
+  test-68: 1#{0} != 1#{0} != 1#{0};
+  test-69: 1#{0}!=1#{0}!=#{1}0;
+  test-70: 1#{0} !=1#{0} !=#{1}0;
+  test-71: 1#{0}!= 1#{0}!= #{1}0;
+  test-72: 1#{0} != 1#{0} != #{1}0;
+  test-73: 1#{0}!=#{1}0!=#{1}0;
+  test-74: 1#{0} !=#{1}0 !=#{1}0;
+  test-75: 1#{0}!= #{1}0!= #{1}0;
+  test-76: 1#{0} != #{1}0 != #{1}0;
+  test-77: #{1}0!=#{1}0!=#{1}0;
+  test-78: #{1}0 !=#{1}0 !=#{1}0;
+  test-79: #{1}0!= #{1}0!= #{1}0;
+  test-80: #{1}0 != #{1}0 != #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..7905dffb08
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: false; test-2: false; test-3: false; test-4: false; test-5: true; test-6: true; test-7: true; test-8: true; test-9: literal!=interpolant; test-10: literal !=interpolant; test-11: literal!= interpolant; test-12: literal != interpolant; test-13: trueritlp; test-14: trueritlp; test-15: trueritlp; test-16: trueritlp; test-17: literal!=litlp_rschema; test-18: literal !=litlp_rschema; test-19: literal!= litlp_rschema; test-20: literal != litlp_rschema; test-21: false; test-22: false; test-23: false; test-24: false; test-25: "quoted"!=interpolant; test-26: "quoted" !=interpolant; test-27: "quoted"!= interpolant; test-28: "quoted" != interpolant; test-29: trueritlp; test-30: trueritlp; test-31: trueritlp; test-32: trueritlp; test-33: "quoted"!=litlp_rschema; test-34: "quoted" !=litlp_rschema; test-35: "quoted"!= litlp_rschema; test-36: "quoted" != litlp_rschema; test-37: interpolant!=interpolant; test-38: interpolant !=interpolant; test-39: interpolant!= interpolant; test-40: interpolant != interpolant; test-41: interpolant!=lschema_ritlp; test-42: interpolant !=lschema_ritlp; test-43: interpolant!= lschema_ritlp; test-44: interpolant != lschema_ritlp; test-45: interpolant!=litlp_rschema; test-46: interpolant !=litlp_rschema; test-47: interpolant!= litlp_rschema; test-48: interpolant != litlp_rschema; test-49: lschema_ritlp!=lschema_ritlp; test-50: lschema_ritlp !=lschema_ritlp; test-51: lschema_ritlp!= lschema_ritlp; test-52: lschema_ritlp != lschema_ritlp; test-53: lschema_ritlp!=litlp_rschema; test-54: lschema_ritlp !=litlp_rschema; test-55: lschema_ritlp!= litlp_rschema; test-56: lschema_ritlp != litlp_rschema; test-57: litlp_rschema!=litlp_rschema; test-58: litlp_rschema !=litlp_rschema; test-59: litlp_rschema!= litlp_rschema; test-60: litlp_rschema != litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..8978219993
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:false;test-2:false;test-3:false;test-4:false;test-5:true;test-6:true;test-7:true;test-8:true;test-9:literal!=interpolant;test-10:literal !=interpolant;test-11:literal!= interpolant;test-12:literal != interpolant;test-13:trueritlp;test-14:trueritlp;test-15:trueritlp;test-16:trueritlp;test-17:literal!=litlp_rschema;test-18:literal !=litlp_rschema;test-19:literal!= litlp_rschema;test-20:literal != litlp_rschema;test-21:false;test-22:false;test-23:false;test-24:false;test-25:"quoted"!=interpolant;test-26:"quoted" !=interpolant;test-27:"quoted"!= interpolant;test-28:"quoted" != interpolant;test-29:trueritlp;test-30:trueritlp;test-31:trueritlp;test-32:trueritlp;test-33:"quoted"!=litlp_rschema;test-34:"quoted" !=litlp_rschema;test-35:"quoted"!= litlp_rschema;test-36:"quoted" != litlp_rschema;test-37:interpolant!=interpolant;test-38:interpolant !=interpolant;test-39:interpolant!= interpolant;test-40:interpolant != interpolant;test-41:interpolant!=lschema_ritlp;test-42:interpolant !=lschema_ritlp;test-43:interpolant!= lschema_ritlp;test-44:interpolant != lschema_ritlp;test-45:interpolant!=litlp_rschema;test-46:interpolant !=litlp_rschema;test-47:interpolant!= litlp_rschema;test-48:interpolant != litlp_rschema;test-49:lschema_ritlp!=lschema_ritlp;test-50:lschema_ritlp !=lschema_ritlp;test-51:lschema_ritlp!= lschema_ritlp;test-52:lschema_ritlp != lschema_ritlp;test-53:lschema_ritlp!=litlp_rschema;test-54:lschema_ritlp !=litlp_rschema;test-55:lschema_ritlp!= litlp_rschema;test-56:lschema_ritlp != litlp_rschema;test-57:litlp_rschema!=litlp_rschema;test-58:litlp_rschema !=litlp_rschema;test-59:litlp_rschema!= litlp_rschema;test-60:litlp_rschema != litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..02cef4e639
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: literal!=interpolant;
+  test-10: literal !=interpolant;
+  test-11: literal!= interpolant;
+  test-12: literal != interpolant;
+  test-13: trueritlp;
+  test-14: trueritlp;
+  test-15: trueritlp;
+  test-16: trueritlp;
+  test-17: literal!=litlp_rschema;
+  test-18: literal !=litlp_rschema;
+  test-19: literal!= litlp_rschema;
+  test-20: literal != litlp_rschema;
+  test-21: false;
+  test-22: false;
+  test-23: false;
+  test-24: false;
+  test-25: "quoted"!=interpolant;
+  test-26: "quoted" !=interpolant;
+  test-27: "quoted"!= interpolant;
+  test-28: "quoted" != interpolant;
+  test-29: trueritlp;
+  test-30: trueritlp;
+  test-31: trueritlp;
+  test-32: trueritlp;
+  test-33: "quoted"!=litlp_rschema;
+  test-34: "quoted" !=litlp_rschema;
+  test-35: "quoted"!= litlp_rschema;
+  test-36: "quoted" != litlp_rschema;
+  test-37: interpolant!=interpolant;
+  test-38: interpolant !=interpolant;
+  test-39: interpolant!= interpolant;
+  test-40: interpolant != interpolant;
+  test-41: interpolant!=lschema_ritlp;
+  test-42: interpolant !=lschema_ritlp;
+  test-43: interpolant!= lschema_ritlp;
+  test-44: interpolant != lschema_ritlp;
+  test-45: interpolant!=litlp_rschema;
+  test-46: interpolant !=litlp_rschema;
+  test-47: interpolant!= litlp_rschema;
+  test-48: interpolant != litlp_rschema;
+  test-49: lschema_ritlp!=lschema_ritlp;
+  test-50: lschema_ritlp !=lschema_ritlp;
+  test-51: lschema_ritlp!= lschema_ritlp;
+  test-52: lschema_ritlp != lschema_ritlp;
+  test-53: lschema_ritlp!=litlp_rschema;
+  test-54: lschema_ritlp !=litlp_rschema;
+  test-55: lschema_ritlp!= litlp_rschema;
+  test-56: lschema_ritlp != litlp_rschema;
+  test-57: litlp_rschema!=litlp_rschema;
+  test-58: litlp_rschema !=litlp_rschema;
+  test-59: litlp_rschema!= litlp_rschema;
+  test-60: litlp_rschema != litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..3f65f20ee2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: false;
+  test-2: false;
+  test-3: false;
+  test-4: false;
+  test-5: true;
+  test-6: true;
+  test-7: true;
+  test-8: true;
+  test-9: literal!=interpolant;
+  test-10: literal !=interpolant;
+  test-11: literal!= interpolant;
+  test-12: literal != interpolant;
+  test-13: trueritlp;
+  test-14: trueritlp;
+  test-15: trueritlp;
+  test-16: trueritlp;
+  test-17: literal!=litlp_rschema;
+  test-18: literal !=litlp_rschema;
+  test-19: literal!= litlp_rschema;
+  test-20: literal != litlp_rschema;
+  test-21: false;
+  test-22: false;
+  test-23: false;
+  test-24: false;
+  test-25: "quoted"!=interpolant;
+  test-26: "quoted" !=interpolant;
+  test-27: "quoted"!= interpolant;
+  test-28: "quoted" != interpolant;
+  test-29: trueritlp;
+  test-30: trueritlp;
+  test-31: trueritlp;
+  test-32: trueritlp;
+  test-33: "quoted"!=litlp_rschema;
+  test-34: "quoted" !=litlp_rschema;
+  test-35: "quoted"!= litlp_rschema;
+  test-36: "quoted" != litlp_rschema;
+  test-37: interpolant!=interpolant;
+  test-38: interpolant !=interpolant;
+  test-39: interpolant!= interpolant;
+  test-40: interpolant != interpolant;
+  test-41: interpolant!=lschema_ritlp;
+  test-42: interpolant !=lschema_ritlp;
+  test-43: interpolant!= lschema_ritlp;
+  test-44: interpolant != lschema_ritlp;
+  test-45: interpolant!=litlp_rschema;
+  test-46: interpolant !=litlp_rschema;
+  test-47: interpolant!= litlp_rschema;
+  test-48: interpolant != litlp_rschema;
+  test-49: lschema_ritlp!=lschema_ritlp;
+  test-50: lschema_ritlp !=lschema_ritlp;
+  test-51: lschema_ritlp!= lschema_ritlp;
+  test-52: lschema_ritlp != lschema_ritlp;
+  test-53: lschema_ritlp!=litlp_rschema;
+  test-54: lschema_ritlp !=litlp_rschema;
+  test-55: lschema_ritlp!= litlp_rschema;
+  test-56: lschema_ritlp != litlp_rschema;
+  test-57: litlp_rschema!=litlp_rschema;
+  test-58: litlp_rschema !=litlp_rschema;
+  test-59: litlp_rschema!= litlp_rschema;
+  test-60: litlp_rschema != litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/input.scss
new file mode 100644
index 0000000000..4ac28a14dc
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal!=literal;
+  test-2: literal !=literal;
+  test-3: literal!= literal;
+  test-4: literal != literal;
+  test-5: literal!="quoted";
+  test-6: literal !="quoted";
+  test-7: literal!= "quoted";
+  test-8: literal != "quoted";
+  test-9: literal!=#{interpolant};
+  test-10: literal !=#{interpolant};
+  test-11: literal!= #{interpolant};
+  test-12: literal != #{interpolant};
+  test-13: literal!=lschema_#{ritlp};
+  test-14: literal !=lschema_#{ritlp};
+  test-15: literal!= lschema_#{ritlp};
+  test-16: literal != lschema_#{ritlp};
+  test-17: literal!=#{litlp}_rschema;
+  test-18: literal !=#{litlp}_rschema;
+  test-19: literal!= #{litlp}_rschema;
+  test-20: literal != #{litlp}_rschema;
+  test-21: "quoted"!="quoted";
+  test-22: "quoted" !="quoted";
+  test-23: "quoted"!= "quoted";
+  test-24: "quoted" != "quoted";
+  test-25: "quoted"!=#{interpolant};
+  test-26: "quoted" !=#{interpolant};
+  test-27: "quoted"!= #{interpolant};
+  test-28: "quoted" != #{interpolant};
+  test-29: "quoted"!=lschema_#{ritlp};
+  test-30: "quoted" !=lschema_#{ritlp};
+  test-31: "quoted"!= lschema_#{ritlp};
+  test-32: "quoted" != lschema_#{ritlp};
+  test-33: "quoted"!=#{litlp}_rschema;
+  test-34: "quoted" !=#{litlp}_rschema;
+  test-35: "quoted"!= #{litlp}_rschema;
+  test-36: "quoted" != #{litlp}_rschema;
+  test-37: #{interpolant}!=#{interpolant};
+  test-38: #{interpolant} !=#{interpolant};
+  test-39: #{interpolant}!= #{interpolant};
+  test-40: #{interpolant} != #{interpolant};
+  test-41: #{interpolant}!=lschema_#{ritlp};
+  test-42: #{interpolant} !=lschema_#{ritlp};
+  test-43: #{interpolant}!= lschema_#{ritlp};
+  test-44: #{interpolant} != lschema_#{ritlp};
+  test-45: #{interpolant}!=#{litlp}_rschema;
+  test-46: #{interpolant} !=#{litlp}_rschema;
+  test-47: #{interpolant}!= #{litlp}_rschema;
+  test-48: #{interpolant} != #{litlp}_rschema;
+  test-49: lschema_#{ritlp}!=lschema_#{ritlp};
+  test-50: lschema_#{ritlp} !=lschema_#{ritlp};
+  test-51: lschema_#{ritlp}!= lschema_#{ritlp};
+  test-52: lschema_#{ritlp} != lschema_#{ritlp};
+  test-53: lschema_#{ritlp}!=#{litlp}_rschema;
+  test-54: lschema_#{ritlp} !=#{litlp}_rschema;
+  test-55: lschema_#{ritlp}!= #{litlp}_rschema;
+  test-56: lschema_#{ritlp} != #{litlp}_rschema;
+  test-57: #{litlp}_rschema!=#{litlp}_rschema;
+  test-58: #{litlp}_rschema !=#{litlp}_rschema;
+  test-59: #{litlp}_rschema!= #{litlp}_rschema;
+  test-60: #{litlp}_rschema != #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/logic_ne/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/tripplets/input.scss
new file mode 100644
index 0000000000..d76930df3c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/logic_ne/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal!=literal!=literal;
+  test-2: literal !=literal !=literal;
+  test-3: literal!= literal!= literal;
+  test-4: literal != literal != literal;
+  test-5: literal!=literal!="quoted";
+  test-6: literal !=literal !="quoted";
+  test-7: literal!= literal!= "quoted";
+  test-8: literal != literal != "quoted";
+  test-9: literal!=literal!=#{interpolant};
+  test-10: literal !=literal !=#{interpolant};
+  test-11: literal!= literal!= #{interpolant};
+  test-12: literal != literal != #{interpolant};
+  test-13: literal!=literal!=lschema_#{ritlp};
+  test-14: literal !=literal !=lschema_#{ritlp};
+  test-15: literal!= literal!= lschema_#{ritlp};
+  test-16: literal != literal != lschema_#{ritlp};
+  test-17: literal!=literal!=#{litlp}_rschema;
+  test-18: literal !=literal !=#{litlp}_rschema;
+  test-19: literal!= literal!= #{litlp}_rschema;
+  test-20: literal != literal != #{litlp}_rschema;
+  test-21: literal!="quoted"!="quoted";
+  test-22: literal !="quoted" !="quoted";
+  test-23: literal!= "quoted"!= "quoted";
+  test-24: literal != "quoted" != "quoted";
+  test-25: literal!="quoted"!=#{interpolant};
+  test-26: literal !="quoted" !=#{interpolant};
+  test-27: literal!= "quoted"!= #{interpolant};
+  test-28: literal != "quoted" != #{interpolant};
+  test-29: literal!="quoted"!=lschema_#{ritlp};
+  test-30: literal !="quoted" !=lschema_#{ritlp};
+  test-31: literal!= "quoted"!= lschema_#{ritlp};
+  test-32: literal != "quoted" != lschema_#{ritlp};
+  test-33: literal!="quoted"!=#{litlp}_rschema;
+  test-34: literal !="quoted" !=#{litlp}_rschema;
+  test-35: literal!= "quoted"!= #{litlp}_rschema;
+  test-36: literal != "quoted" != #{litlp}_rschema;
+  test-37: literal!=#{interpolant}!=#{interpolant};
+  test-38: literal !=#{interpolant} !=#{interpolant};
+  test-39: literal!= #{interpolant}!= #{interpolant};
+  test-40: literal != #{interpolant} != #{interpolant};
+  test-41: literal!=#{interpolant}!=lschema_#{ritlp};
+  test-42: literal !=#{interpolant} !=lschema_#{ritlp};
+  test-43: literal!= #{interpolant}!= lschema_#{ritlp};
+  test-44: literal != #{interpolant} != lschema_#{ritlp};
+  test-45: literal!=#{interpolant}!=#{litlp}_rschema;
+  test-46: literal !=#{interpolant} !=#{litlp}_rschema;
+  test-47: literal!= #{interpolant}!= #{litlp}_rschema;
+  test-48: literal != #{interpolant} != #{litlp}_rschema;
+  test-49: literal!=lschema_#{ritlp}!=lschema_#{ritlp};
+  test-50: literal !=lschema_#{ritlp} !=lschema_#{ritlp};
+  test-51: literal!= lschema_#{ritlp}!= lschema_#{ritlp};
+  test-52: literal != lschema_#{ritlp} != lschema_#{ritlp};
+  test-53: literal!=lschema_#{ritlp}!=#{litlp}_rschema;
+  test-54: literal !=lschema_#{ritlp} !=#{litlp}_rschema;
+  test-55: literal!= lschema_#{ritlp}!= #{litlp}_rschema;
+  test-56: literal != lschema_#{ritlp} != #{litlp}_rschema;
+  test-57: literal!=#{litlp}_rschema!=#{litlp}_rschema;
+  test-58: literal !=#{litlp}_rschema !=#{litlp}_rschema;
+  test-59: literal!= #{litlp}_rschema!= #{litlp}_rschema;
+  test-60: literal != #{litlp}_rschema != #{litlp}_rschema;
+  test-61: "quoted"!="quoted"!="quoted";
+  test-62: "quoted" !="quoted" !="quoted";
+  test-63: "quoted"!= "quoted"!= "quoted";
+  test-64: "quoted" != "quoted" != "quoted";
+  test-65: "quoted"!="quoted"!=#{interpolant};
+  test-66: "quoted" !="quoted" !=#{interpolant};
+  test-67: "quoted"!= "quoted"!= #{interpolant};
+  test-68: "quoted" != "quoted" != #{interpolant};
+  test-69: "quoted"!="quoted"!=lschema_#{ritlp};
+  test-70: "quoted" !="quoted" !=lschema_#{ritlp};
+  test-71: "quoted"!= "quoted"!= lschema_#{ritlp};
+  test-72: "quoted" != "quoted" != lschema_#{ritlp};
+  test-73: "quoted"!="quoted"!=#{litlp}_rschema;
+  test-74: "quoted" !="quoted" !=#{litlp}_rschema;
+  test-75: "quoted"!= "quoted"!= #{litlp}_rschema;
+  test-76: "quoted" != "quoted" != #{litlp}_rschema;
+  test-77: "quoted"!=#{interpolant}!=#{interpolant};
+  test-78: "quoted" !=#{interpolant} !=#{interpolant};
+  test-79: "quoted"!= #{interpolant}!= #{interpolant};
+  test-80: "quoted" != #{interpolant} != #{interpolant};
+  test-81: "quoted"!=#{interpolant}!=lschema_#{ritlp};
+  test-82: "quoted" !=#{interpolant} !=lschema_#{ritlp};
+  test-83: "quoted"!= #{interpolant}!= lschema_#{ritlp};
+  test-84: "quoted" != #{interpolant} != lschema_#{ritlp};
+  test-85: "quoted"!=#{interpolant}!=#{litlp}_rschema;
+  test-86: "quoted" !=#{interpolant} !=#{litlp}_rschema;
+  test-87: "quoted"!= #{interpolant}!= #{litlp}_rschema;
+  test-88: "quoted" != #{interpolant} != #{litlp}_rschema;
+  test-89: "quoted"!=lschema_#{ritlp}!=lschema_#{ritlp};
+  test-90: "quoted" !=lschema_#{ritlp} !=lschema_#{ritlp};
+  test-91: "quoted"!= lschema_#{ritlp}!= lschema_#{ritlp};
+  test-92: "quoted" != lschema_#{ritlp} != lschema_#{ritlp};
+  test-93: "quoted"!=lschema_#{ritlp}!=#{litlp}_rschema;
+  test-94: "quoted" !=lschema_#{ritlp} !=#{litlp}_rschema;
+  test-95: "quoted"!= lschema_#{ritlp}!= #{litlp}_rschema;
+  test-96: "quoted" != lschema_#{ritlp} != #{litlp}_rschema;
+  test-97: "quoted"!=#{litlp}_rschema!=#{litlp}_rschema;
+  test-98: "quoted" !=#{litlp}_rschema !=#{litlp}_rschema;
+  test-99: "quoted"!= #{litlp}_rschema!= #{litlp}_rschema;
+  test-100: "quoted" != #{litlp}_rschema != #{litlp}_rschema;
+  test-101: #{interpolant}!=#{interpolant}!=#{interpolant};
+  test-102: #{interpolant} !=#{interpolant} !=#{interpolant};
+  test-103: #{interpolant}!= #{interpolant}!= #{interpolant};
+  test-104: #{interpolant} != #{interpolant} != #{interpolant};
+  test-105: #{interpolant}!=#{interpolant}!=lschema_#{ritlp};
+  test-106: #{interpolant} !=#{interpolant} !=lschema_#{ritlp};
+  test-107: #{interpolant}!= #{interpolant}!= lschema_#{ritlp};
+  test-108: #{interpolant} != #{interpolant} != lschema_#{ritlp};
+  test-109: #{interpolant}!=#{interpolant}!=#{litlp}_rschema;
+  test-110: #{interpolant} !=#{interpolant} !=#{litlp}_rschema;
+  test-111: #{interpolant}!= #{interpolant}!= #{litlp}_rschema;
+  test-112: #{interpolant} != #{interpolant} != #{litlp}_rschema;
+  test-113: #{interpolant}!=lschema_#{ritlp}!=lschema_#{ritlp};
+  test-114: #{interpolant} !=lschema_#{ritlp} !=lschema_#{ritlp};
+  test-115: #{interpolant}!= lschema_#{ritlp}!= lschema_#{ritlp};
+  test-116: #{interpolant} != lschema_#{ritlp} != lschema_#{ritlp};
+  test-117: #{interpolant}!=lschema_#{ritlp}!=#{litlp}_rschema;
+  test-118: #{interpolant} !=lschema_#{ritlp} !=#{litlp}_rschema;
+  test-119: #{interpolant}!= lschema_#{ritlp}!= #{litlp}_rschema;
+  test-120: #{interpolant} != lschema_#{ritlp} != #{litlp}_rschema;
+  test-121: #{interpolant}!=#{litlp}_rschema!=#{litlp}_rschema;
+  test-122: #{interpolant} !=#{litlp}_rschema !=#{litlp}_rschema;
+  test-123: #{interpolant}!= #{litlp}_rschema!= #{litlp}_rschema;
+  test-124: #{interpolant} != #{litlp}_rschema != #{litlp}_rschema;
+  test-125: lschema_#{ritlp}!=lschema_#{ritlp}!=lschema_#{ritlp};
+  test-126: lschema_#{ritlp} !=lschema_#{ritlp} !=lschema_#{ritlp};
+  test-127: lschema_#{ritlp}!= lschema_#{ritlp}!= lschema_#{ritlp};
+  test-128: lschema_#{ritlp} != lschema_#{ritlp} != lschema_#{ritlp};
+  test-129: lschema_#{ritlp}!=lschema_#{ritlp}!=#{litlp}_rschema;
+  test-130: lschema_#{ritlp} !=lschema_#{ritlp} !=#{litlp}_rschema;
+  test-131: lschema_#{ritlp}!= lschema_#{ritlp}!= #{litlp}_rschema;
+  test-132: lschema_#{ritlp} != lschema_#{ritlp} != #{litlp}_rschema;
+  test-133: lschema_#{ritlp}!=#{litlp}_rschema!=#{litlp}_rschema;
+  test-134: lschema_#{ritlp} !=#{litlp}_rschema !=#{litlp}_rschema;
+  test-135: lschema_#{ritlp}!= #{litlp}_rschema!= #{litlp}_rschema;
+  test-136: lschema_#{ritlp} != #{litlp}_rschema != #{litlp}_rschema;
+  test-137: #{litlp}_rschema!=#{litlp}_rschema!=#{litlp}_rschema;
+  test-138: #{litlp}_rschema !=#{litlp}_rschema !=#{litlp}_rschema;
+  test-139: #{litlp}_rschema!= #{litlp}_rschema!= #{litlp}_rschema;
+  test-140: #{litlp}_rschema != #{litlp}_rschema != #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/error b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/error
new file mode 100644
index 0000000000..4c6c002054
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "px mod 1".
+        on line 50 of /sass/sass-spec/spec/parser/operations/modulo/dimensions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..c972763ba9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10%10;
+  test-2: 10 %10;
+  test-3: 10% 10;
+  test-4: 10 % 10;
+  test-5: 10%10px;
+  test-6: 10 %10px;
+  test-7: 10% 10px;
+  test-8: 10 % 10px;
+  test-9: 10%#{10}px;
+  test-10: 10 %#{10}px;
+  test-11: 10% #{10}px;
+  test-12: 10 % #{10}px;
+  test-13: 10%1#{0}px;
+  test-14: 10 %1#{0}px;
+  test-15: 10% 1#{0}px;
+  test-16: 10 % 1#{0}px;
+  test-17: 10%10#{px};
+  test-18: 10 %10#{px};
+  test-19: 10% 10#{px};
+  test-20: 10 % 10#{px};
+  test-21: 10%10#{p}x;
+  test-22: 10 %10#{p}x;
+  test-23: 10% 10#{p}x;
+  test-24: 10 % 10#{p}x;
+  test-25: 10px%10px;
+  test-26: 10px %10px;
+  test-27: 10px% 10px;
+  test-28: 10px % 10px;
+  test-29: 10px%#{10}px;
+  test-30: 10px %#{10}px;
+  test-31: 10px% #{10}px;
+  test-32: 10px % #{10}px;
+  test-33: 10px%1#{0}px;
+  test-34: 10px %1#{0}px;
+  test-35: 10px% 1#{0}px;
+  test-36: 10px % 1#{0}px;
+  test-37: 10px%10#{px};
+  test-38: 10px %10#{px};
+  test-39: 10px% 10#{px};
+  test-40: 10px % 10#{px};
+  test-41: 10px%10#{p}x;
+  test-42: 10px %10#{p}x;
+  test-43: 10px% 10#{p}x;
+  test-44: 10px % 10#{p}x;
+  test-45: #{10}px%#{10}px;
+  test-46: #{10}px %#{10}px;
+  test-47: #{10}px% #{10}px;
+  test-48: #{10}px % #{10}px;
+  test-49: #{10}px%1#{0}px;
+  test-50: #{10}px %1#{0}px;
+  test-51: #{10}px% 1#{0}px;
+  test-52: #{10}px % 1#{0}px;
+  test-53: #{10}px%10#{px};
+  test-54: #{10}px %10#{px};
+  test-55: #{10}px% 10#{px};
+  test-56: #{10}px % 10#{px};
+  test-57: #{10}px%10#{p}x;
+  test-58: #{10}px %10#{p}x;
+  test-59: #{10}px% 10#{p}x;
+  test-60: #{10}px % 10#{p}x;
+  test-61: 1#{0}px%1#{0}px;
+  test-62: 1#{0}px %1#{0}px;
+  test-63: 1#{0}px% 1#{0}px;
+  test-64: 1#{0}px % 1#{0}px;
+  test-65: 1#{0}px%10#{px};
+  test-66: 1#{0}px %10#{px};
+  test-67: 1#{0}px% 10#{px};
+  test-68: 1#{0}px % 10#{px};
+  test-69: 1#{0}px%10#{p}x;
+  test-70: 1#{0}px %10#{p}x;
+  test-71: 1#{0}px% 10#{p}x;
+  test-72: 1#{0}px % 10#{p}x;
+  test-73: 10#{px}%10#{px};
+  test-74: 10#{px} %10#{px};
+  test-75: 10#{px}% 10#{px};
+  test-76: 10#{px} % 10#{px};
+  test-77: 10#{px}%10#{p}x;
+  test-78: 10#{px} %10#{p}x;
+  test-79: 10#{px}% 10#{p}x;
+  test-80: 10#{px} % 10#{p}x;
+  test-81: 10#{p}x%10#{p}x;
+  test-82: 10#{p}x %10#{p}x;
+  test-83: 10#{p}x% 10#{p}x;
+  test-84: 10#{p}x % 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/status b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..e37e54eac1
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10%10%10;
+  test-2: 10 %10 %10;
+  test-3: 10% 10% 10;
+  test-4: 10 % 10 % 10;
+  test-5: 10%10%10px;
+  test-6: 10 %10 %10px;
+  test-7: 10% 10% 10px;
+  test-8: 10 % 10 % 10px;
+  test-9: 10%10%#{10}px;
+  test-10: 10 %10 %#{10}px;
+  test-11: 10% 10% #{10}px;
+  test-12: 10 % 10 % #{10}px;
+  test-13: 10%10%1#{0}px;
+  test-14: 10 %10 %1#{0}px;
+  test-15: 10% 10% 1#{0}px;
+  test-16: 10 % 10 % 1#{0}px;
+  test-17: 10%10%10#{px};
+  test-18: 10 %10 %10#{px};
+  test-19: 10% 10% 10#{px};
+  test-20: 10 % 10 % 10#{px};
+  test-21: 10%10%10#{p}x;
+  test-22: 10 %10 %10#{p}x;
+  test-23: 10% 10% 10#{p}x;
+  test-24: 10 % 10 % 10#{p}x;
+  test-25: 10%10px%10px;
+  test-26: 10 %10px %10px;
+  test-27: 10% 10px% 10px;
+  test-28: 10 % 10px % 10px;
+  test-29: 10%10px%#{10}px;
+  test-30: 10 %10px %#{10}px;
+  test-31: 10% 10px% #{10}px;
+  test-32: 10 % 10px % #{10}px;
+  test-33: 10%10px%1#{0}px;
+  test-34: 10 %10px %1#{0}px;
+  test-35: 10% 10px% 1#{0}px;
+  test-36: 10 % 10px % 1#{0}px;
+  test-37: 10%10px%10#{px};
+  test-38: 10 %10px %10#{px};
+  test-39: 10% 10px% 10#{px};
+  test-40: 10 % 10px % 10#{px};
+  test-41: 10%10px%10#{p}x;
+  test-42: 10 %10px %10#{p}x;
+  test-43: 10% 10px% 10#{p}x;
+  test-44: 10 % 10px % 10#{p}x;
+  test-45: 10%#{10}px%#{10}px;
+  test-46: 10 %#{10}px %#{10}px;
+  test-47: 10% #{10}px% #{10}px;
+  test-48: 10 % #{10}px % #{10}px;
+  test-49: 10%#{10}px%1#{0}px;
+  test-50: 10 %#{10}px %1#{0}px;
+  test-51: 10% #{10}px% 1#{0}px;
+  test-52: 10 % #{10}px % 1#{0}px;
+  test-53: 10%#{10}px%10#{px};
+  test-54: 10 %#{10}px %10#{px};
+  test-55: 10% #{10}px% 10#{px};
+  test-56: 10 % #{10}px % 10#{px};
+  test-57: 10%#{10}px%10#{p}x;
+  test-58: 10 %#{10}px %10#{p}x;
+  test-59: 10% #{10}px% 10#{p}x;
+  test-60: 10 % #{10}px % 10#{p}x;
+  test-61: 10%1#{0}px%1#{0}px;
+  test-62: 10 %1#{0}px %1#{0}px;
+  test-63: 10% 1#{0}px% 1#{0}px;
+  test-64: 10 % 1#{0}px % 1#{0}px;
+  test-65: 10%1#{0}px%10#{px};
+  test-66: 10 %1#{0}px %10#{px};
+  test-67: 10% 1#{0}px% 10#{px};
+  test-68: 10 % 1#{0}px % 10#{px};
+  test-69: 10%1#{0}px%10#{p}x;
+  test-70: 10 %1#{0}px %10#{p}x;
+  test-71: 10% 1#{0}px% 10#{p}x;
+  test-72: 10 % 1#{0}px % 10#{p}x;
+  test-73: 10%10#{px}%10#{px};
+  test-74: 10 %10#{px} %10#{px};
+  test-75: 10% 10#{px}% 10#{px};
+  test-76: 10 % 10#{px} % 10#{px};
+  test-77: 10%10#{px}%10#{p}x;
+  test-78: 10 %10#{px} %10#{p}x;
+  test-79: 10% 10#{px}% 10#{p}x;
+  test-80: 10 % 10#{px} % 10#{p}x;
+  test-81: 10%10#{p}x%10#{p}x;
+  test-82: 10 %10#{p}x %10#{p}x;
+  test-83: 10% 10#{p}x% 10#{p}x;
+  test-84: 10 % 10#{p}x % 10#{p}x;
+  test-85: 10px%10px%10px;
+  test-86: 10px %10px %10px;
+  test-87: 10px% 10px% 10px;
+  test-88: 10px % 10px % 10px;
+  test-89: 10px%10px%#{10}px;
+  test-90: 10px %10px %#{10}px;
+  test-91: 10px% 10px% #{10}px;
+  test-92: 10px % 10px % #{10}px;
+  test-93: 10px%10px%1#{0}px;
+  test-94: 10px %10px %1#{0}px;
+  test-95: 10px% 10px% 1#{0}px;
+  test-96: 10px % 10px % 1#{0}px;
+  test-97: 10px%10px%10#{px};
+  test-98: 10px %10px %10#{px};
+  test-99: 10px% 10px% 10#{px};
+  test-100: 10px % 10px % 10#{px};
+  test-101: 10px%10px%10#{p}x;
+  test-102: 10px %10px %10#{p}x;
+  test-103: 10px% 10px% 10#{p}x;
+  test-104: 10px % 10px % 10#{p}x;
+  test-105: 10px%#{10}px%#{10}px;
+  test-106: 10px %#{10}px %#{10}px;
+  test-107: 10px% #{10}px% #{10}px;
+  test-108: 10px % #{10}px % #{10}px;
+  test-109: 10px%#{10}px%1#{0}px;
+  test-110: 10px %#{10}px %1#{0}px;
+  test-111: 10px% #{10}px% 1#{0}px;
+  test-112: 10px % #{10}px % 1#{0}px;
+  test-113: 10px%#{10}px%10#{px};
+  test-114: 10px %#{10}px %10#{px};
+  test-115: 10px% #{10}px% 10#{px};
+  test-116: 10px % #{10}px % 10#{px};
+  test-117: 10px%#{10}px%10#{p}x;
+  test-118: 10px %#{10}px %10#{p}x;
+  test-119: 10px% #{10}px% 10#{p}x;
+  test-120: 10px % #{10}px % 10#{p}x;
+  test-121: 10px%1#{0}px%1#{0}px;
+  test-122: 10px %1#{0}px %1#{0}px;
+  test-123: 10px% 1#{0}px% 1#{0}px;
+  test-124: 10px % 1#{0}px % 1#{0}px;
+  test-125: 10px%1#{0}px%10#{px};
+  test-126: 10px %1#{0}px %10#{px};
+  test-127: 10px% 1#{0}px% 10#{px};
+  test-128: 10px % 1#{0}px % 10#{px};
+  test-129: 10px%1#{0}px%10#{p}x;
+  test-130: 10px %1#{0}px %10#{p}x;
+  test-131: 10px% 1#{0}px% 10#{p}x;
+  test-132: 10px % 1#{0}px % 10#{p}x;
+  test-133: 10px%10#{px}%10#{px};
+  test-134: 10px %10#{px} %10#{px};
+  test-135: 10px% 10#{px}% 10#{px};
+  test-136: 10px % 10#{px} % 10#{px};
+  test-137: 10px%10#{px}%10#{p}x;
+  test-138: 10px %10#{px} %10#{p}x;
+  test-139: 10px% 10#{px}% 10#{p}x;
+  test-140: 10px % 10#{px} % 10#{p}x;
+  test-141: 10px%10#{p}x%10#{p}x;
+  test-142: 10px %10#{p}x %10#{p}x;
+  test-143: 10px% 10#{p}x% 10#{p}x;
+  test-144: 10px % 10#{p}x % 10#{p}x;
+  test-145: #{10}px%#{10}px%#{10}px;
+  test-146: #{10}px %#{10}px %#{10}px;
+  test-147: #{10}px% #{10}px% #{10}px;
+  test-148: #{10}px % #{10}px % #{10}px;
+  test-149: #{10}px%#{10}px%1#{0}px;
+  test-150: #{10}px %#{10}px %1#{0}px;
+  test-151: #{10}px% #{10}px% 1#{0}px;
+  test-152: #{10}px % #{10}px % 1#{0}px;
+  test-153: #{10}px%#{10}px%10#{px};
+  test-154: #{10}px %#{10}px %10#{px};
+  test-155: #{10}px% #{10}px% 10#{px};
+  test-156: #{10}px % #{10}px % 10#{px};
+  test-157: #{10}px%#{10}px%10#{p}x;
+  test-158: #{10}px %#{10}px %10#{p}x;
+  test-159: #{10}px% #{10}px% 10#{p}x;
+  test-160: #{10}px % #{10}px % 10#{p}x;
+  test-161: #{10}px%1#{0}px%1#{0}px;
+  test-162: #{10}px %1#{0}px %1#{0}px;
+  test-163: #{10}px% 1#{0}px% 1#{0}px;
+  test-164: #{10}px % 1#{0}px % 1#{0}px;
+  test-165: #{10}px%1#{0}px%10#{px};
+  test-166: #{10}px %1#{0}px %10#{px};
+  test-167: #{10}px% 1#{0}px% 10#{px};
+  test-168: #{10}px % 1#{0}px % 10#{px};
+  test-169: #{10}px%1#{0}px%10#{p}x;
+  test-170: #{10}px %1#{0}px %10#{p}x;
+  test-171: #{10}px% 1#{0}px% 10#{p}x;
+  test-172: #{10}px % 1#{0}px % 10#{p}x;
+  test-173: #{10}px%10#{px}%10#{px};
+  test-174: #{10}px %10#{px} %10#{px};
+  test-175: #{10}px% 10#{px}% 10#{px};
+  test-176: #{10}px % 10#{px} % 10#{px};
+  test-177: #{10}px%10#{px}%10#{p}x;
+  test-178: #{10}px %10#{px} %10#{p}x;
+  test-179: #{10}px% 10#{px}% 10#{p}x;
+  test-180: #{10}px % 10#{px} % 10#{p}x;
+  test-181: #{10}px%10#{p}x%10#{p}x;
+  test-182: #{10}px %10#{p}x %10#{p}x;
+  test-183: #{10}px% 10#{p}x% 10#{p}x;
+  test-184: #{10}px % 10#{p}x % 10#{p}x;
+  test-185: 1#{0}px%1#{0}px%1#{0}px;
+  test-186: 1#{0}px %1#{0}px %1#{0}px;
+  test-187: 1#{0}px% 1#{0}px% 1#{0}px;
+  test-188: 1#{0}px % 1#{0}px % 1#{0}px;
+  test-189: 1#{0}px%1#{0}px%10#{px};
+  test-190: 1#{0}px %1#{0}px %10#{px};
+  test-191: 1#{0}px% 1#{0}px% 10#{px};
+  test-192: 1#{0}px % 1#{0}px % 10#{px};
+  test-193: 1#{0}px%1#{0}px%10#{p}x;
+  test-194: 1#{0}px %1#{0}px %10#{p}x;
+  test-195: 1#{0}px% 1#{0}px% 10#{p}x;
+  test-196: 1#{0}px % 1#{0}px % 10#{p}x;
+  test-197: 1#{0}px%10#{px}%10#{px};
+  test-198: 1#{0}px %10#{px} %10#{px};
+  test-199: 1#{0}px% 10#{px}% 10#{px};
+  test-200: 1#{0}px % 10#{px} % 10#{px};
+  test-201: 1#{0}px%10#{px}%10#{p}x;
+  test-202: 1#{0}px %10#{px} %10#{p}x;
+  test-203: 1#{0}px% 10#{px}% 10#{p}x;
+  test-204: 1#{0}px % 10#{px} % 10#{p}x;
+  test-205: 1#{0}px%10#{p}x%10#{p}x;
+  test-206: 1#{0}px %10#{p}x %10#{p}x;
+  test-207: 1#{0}px% 10#{p}x% 10#{p}x;
+  test-208: 1#{0}px % 10#{p}x % 10#{p}x;
+  test-209: 10#{px}%10#{px}%10#{px};
+  test-210: 10#{px} %10#{px} %10#{px};
+  test-211: 10#{px}% 10#{px}% 10#{px};
+  test-212: 10#{px} % 10#{px} % 10#{px};
+  test-213: 10#{px}%10#{px}%10#{p}x;
+  test-214: 10#{px} %10#{px} %10#{p}x;
+  test-215: 10#{px}% 10#{px}% 10#{p}x;
+  test-216: 10#{px} % 10#{px} % 10#{p}x;
+  test-217: 10#{px}%10#{p}x%10#{p}x;
+  test-218: 10#{px} %10#{p}x %10#{p}x;
+  test-219: 10#{px}% 10#{p}x% 10#{p}x;
+  test-220: 10#{px} % 10#{p}x % 10#{p}x;
+  test-221: 10#{p}x%10#{p}x%10#{p}x;
+  test-222: 10#{p}x %10#{p}x %10#{p}x;
+  test-223: 10#{p}x% 10#{p}x% 10#{p}x;
+  test-224: 10#{p}x % 10#{p}x % 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/error
new file mode 100644
index 0000000000..4987c2e627
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25%#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/modulo/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/input.scss
new file mode 100644
index 0000000000..f5ffbd674b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25%.25;
+  test-2: .25 %.25;
+  test-3: .25% .25;
+  test-4: .25 % .25;
+  test-5: .25%-.25;
+  test-6: .25 %-.25;
+  test-7: .25% -.25;
+  test-8: .25 % -.25;
+  test-9: .25%#{.25};
+  test-10: .25 %#{.25};
+  test-11: .25% #{.25};
+  test-12: .25 % #{.25};
+  test-13: .25%#{-.25};
+  test-14: .25 %#{-.25};
+  test-15: .25% #{-.25};
+  test-16: .25 % #{-.25};
+  test-17: .25%#{.}25;
+  test-18: .25 %#{.}25;
+  test-19: .25% #{.}25;
+  test-20: .25 % #{.}25;
+  test-21: -.25%-.25;
+  test-22: -.25 %-.25;
+  test-23: -.25% -.25;
+  test-24: -.25 % -.25;
+  test-25: -.25%#{.25};
+  test-26: -.25 %#{.25};
+  test-27: -.25% #{.25};
+  test-28: -.25 % #{.25};
+  test-29: -.25%#{-.25};
+  test-30: -.25 %#{-.25};
+  test-31: -.25% #{-.25};
+  test-32: -.25 % #{-.25};
+  test-33: -.25%#{.}25;
+  test-34: -.25 %#{.}25;
+  test-35: -.25% #{.}25;
+  test-36: -.25 % #{.}25;
+  test-37: #{.25}%#{.25};
+  test-38: #{.25} %#{.25};
+  test-39: #{.25}% #{.25};
+  test-40: #{.25} % #{.25};
+  test-41: #{.25}%#{-.25};
+  test-42: #{.25} %#{-.25};
+  test-43: #{.25}% #{-.25};
+  test-44: #{.25} % #{-.25};
+  test-45: #{.25}%#{.}25;
+  test-46: #{.25} %#{.}25;
+  test-47: #{.25}% #{.}25;
+  test-48: #{.25} % #{.}25;
+  test-49: #{-.25}%#{-.25};
+  test-50: #{-.25} %#{-.25};
+  test-51: #{-.25}% #{-.25};
+  test-52: #{-.25} % #{-.25};
+  test-53: #{-.25}%#{.}25;
+  test-54: #{-.25} %#{.}25;
+  test-55: #{-.25}% #{.}25;
+  test-56: #{-.25} % #{.}25;
+  test-57: #{.}25%#{.}25;
+  test-58: #{.}25 %#{.}25;
+  test-59: #{.}25% #{.}25;
+  test-60: #{.}25 % #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..84fb900823
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25%.25%.25;
+  test-2: .25 %.25 %.25;
+  test-3: .25% .25% .25;
+  test-4: .25 % .25 % .25;
+  test-5: .25%.25%-.25;
+  test-6: .25 %.25 %-.25;
+  test-7: .25% .25% -.25;
+  test-8: .25 % .25 % -.25;
+  test-9: .25%.25%#{.25};
+  test-10: .25 %.25 %#{.25};
+  test-11: .25% .25% #{.25};
+  test-12: .25 % .25 % #{.25};
+  test-13: .25%.25%#{-.25};
+  test-14: .25 %.25 %#{-.25};
+  test-15: .25% .25% #{-.25};
+  test-16: .25 % .25 % #{-.25};
+  test-17: .25%.25%#{.}25;
+  test-18: .25 %.25 %#{.}25;
+  test-19: .25% .25% #{.}25;
+  test-20: .25 % .25 % #{.}25;
+  test-21: .25%-.25%-.25;
+  test-22: .25 %-.25 %-.25;
+  test-23: .25% -.25% -.25;
+  test-24: .25 % -.25 % -.25;
+  test-25: .25%-.25%#{.25};
+  test-26: .25 %-.25 %#{.25};
+  test-27: .25% -.25% #{.25};
+  test-28: .25 % -.25 % #{.25};
+  test-29: .25%-.25%#{-.25};
+  test-30: .25 %-.25 %#{-.25};
+  test-31: .25% -.25% #{-.25};
+  test-32: .25 % -.25 % #{-.25};
+  test-33: .25%-.25%#{.}25;
+  test-34: .25 %-.25 %#{.}25;
+  test-35: .25% -.25% #{.}25;
+  test-36: .25 % -.25 % #{.}25;
+  test-37: .25%#{.25}%#{.25};
+  test-38: .25 %#{.25} %#{.25};
+  test-39: .25% #{.25}% #{.25};
+  test-40: .25 % #{.25} % #{.25};
+  test-41: .25%#{.25}%#{-.25};
+  test-42: .25 %#{.25} %#{-.25};
+  test-43: .25% #{.25}% #{-.25};
+  test-44: .25 % #{.25} % #{-.25};
+  test-45: .25%#{.25}%#{.}25;
+  test-46: .25 %#{.25} %#{.}25;
+  test-47: .25% #{.25}% #{.}25;
+  test-48: .25 % #{.25} % #{.}25;
+  test-49: .25%#{-.25}%#{-.25};
+  test-50: .25 %#{-.25} %#{-.25};
+  test-51: .25% #{-.25}% #{-.25};
+  test-52: .25 % #{-.25} % #{-.25};
+  test-53: .25%#{-.25}%#{.}25;
+  test-54: .25 %#{-.25} %#{.}25;
+  test-55: .25% #{-.25}% #{.}25;
+  test-56: .25 % #{-.25} % #{.}25;
+  test-57: .25%#{.}25%#{.}25;
+  test-58: .25 %#{.}25 %#{.}25;
+  test-59: .25% #{.}25% #{.}25;
+  test-60: .25 % #{.}25 % #{.}25;
+  test-61: -.25%-.25%-.25;
+  test-62: -.25 %-.25 %-.25;
+  test-63: -.25% -.25% -.25;
+  test-64: -.25 % -.25 % -.25;
+  test-65: -.25%-.25%#{.25};
+  test-66: -.25 %-.25 %#{.25};
+  test-67: -.25% -.25% #{.25};
+  test-68: -.25 % -.25 % #{.25};
+  test-69: -.25%-.25%#{-.25};
+  test-70: -.25 %-.25 %#{-.25};
+  test-71: -.25% -.25% #{-.25};
+  test-72: -.25 % -.25 % #{-.25};
+  test-73: -.25%-.25%#{.}25;
+  test-74: -.25 %-.25 %#{.}25;
+  test-75: -.25% -.25% #{.}25;
+  test-76: -.25 % -.25 % #{.}25;
+  test-77: -.25%#{.25}%#{.25};
+  test-78: -.25 %#{.25} %#{.25};
+  test-79: -.25% #{.25}% #{.25};
+  test-80: -.25 % #{.25} % #{.25};
+  test-81: -.25%#{.25}%#{-.25};
+  test-82: -.25 %#{.25} %#{-.25};
+  test-83: -.25% #{.25}% #{-.25};
+  test-84: -.25 % #{.25} % #{-.25};
+  test-85: -.25%#{.25}%#{.}25;
+  test-86: -.25 %#{.25} %#{.}25;
+  test-87: -.25% #{.25}% #{.}25;
+  test-88: -.25 % #{.25} % #{.}25;
+  test-89: -.25%#{-.25}%#{-.25};
+  test-90: -.25 %#{-.25} %#{-.25};
+  test-91: -.25% #{-.25}% #{-.25};
+  test-92: -.25 % #{-.25} % #{-.25};
+  test-93: -.25%#{-.25}%#{.}25;
+  test-94: -.25 %#{-.25} %#{.}25;
+  test-95: -.25% #{-.25}% #{.}25;
+  test-96: -.25 % #{-.25} % #{.}25;
+  test-97: -.25%#{.}25%#{.}25;
+  test-98: -.25 %#{.}25 %#{.}25;
+  test-99: -.25% #{.}25% #{.}25;
+  test-100: -.25 % #{.}25 % #{.}25;
+  test-101: #{.25}%#{.25}%#{.25};
+  test-102: #{.25} %#{.25} %#{.25};
+  test-103: #{.25}% #{.25}% #{.25};
+  test-104: #{.25} % #{.25} % #{.25};
+  test-105: #{.25}%#{.25}%#{-.25};
+  test-106: #{.25} %#{.25} %#{-.25};
+  test-107: #{.25}% #{.25}% #{-.25};
+  test-108: #{.25} % #{.25} % #{-.25};
+  test-109: #{.25}%#{.25}%#{.}25;
+  test-110: #{.25} %#{.25} %#{.}25;
+  test-111: #{.25}% #{.25}% #{.}25;
+  test-112: #{.25} % #{.25} % #{.}25;
+  test-113: #{.25}%#{-.25}%#{-.25};
+  test-114: #{.25} %#{-.25} %#{-.25};
+  test-115: #{.25}% #{-.25}% #{-.25};
+  test-116: #{.25} % #{-.25} % #{-.25};
+  test-117: #{.25}%#{-.25}%#{.}25;
+  test-118: #{.25} %#{-.25} %#{.}25;
+  test-119: #{.25}% #{-.25}% #{.}25;
+  test-120: #{.25} % #{-.25} % #{.}25;
+  test-121: #{.25}%#{.}25%#{.}25;
+  test-122: #{.25} %#{.}25 %#{.}25;
+  test-123: #{.25}% #{.}25% #{.}25;
+  test-124: #{.25} % #{.}25 % #{.}25;
+  test-125: #{-.25}%#{-.25}%#{-.25};
+  test-126: #{-.25} %#{-.25} %#{-.25};
+  test-127: #{-.25}% #{-.25}% #{-.25};
+  test-128: #{-.25} % #{-.25} % #{-.25};
+  test-129: #{-.25}%#{-.25}%#{.}25;
+  test-130: #{-.25} %#{-.25} %#{.}25;
+  test-131: #{-.25}% #{-.25}% #{.}25;
+  test-132: #{-.25} % #{-.25} % #{.}25;
+  test-133: #{-.25}%#{.}25%#{.}25;
+  test-134: #{-.25} %#{.}25 %#{.}25;
+  test-135: #{-.25}% #{.}25% #{.}25;
+  test-136: #{-.25} % #{.}25 % #{.}25;
+  test-137: #{.}25%#{.}25%#{.}25;
+  test-138: #{.}25 %#{.}25 %#{.}25;
+  test-139: #{.}25% #{.}25% #{.}25;
+  test-140: #{.}25 % #{.}25 % #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/error
new file mode 100644
index 0000000000..e5dccb34d6
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Undefined operation: "10 mod #AAA".
+        on line 15 of /sass/sass-spec/spec/parser/operations/modulo/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/input.scss
new file mode 100644
index 0000000000..ab9f33ccfe
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10%10;
+  test-2: 10 %10;
+  test-3: 10% 10;
+  test-4: 10 % 10;
+  test-5: 10%10%;
+  test-6: 10 %10%;
+  test-7: 10% 10%;
+  test-8: 10 % 10%;
+  test-9: 10%10px;
+  test-10: 10 %10px;
+  test-11: 10% 10px;
+  test-12: 10 % 10px;
+  test-13: 10%#AAA;
+  test-14: 10 %#AAA;
+  test-15: 10% #AAA;
+  test-16: 10 % #AAA;
+  test-17: 10%#{itpl};
+  test-18: 10 %#{itpl};
+  test-19: 10% #{itpl};
+  test-20: 10 % #{itpl};
+  test-21: 10%%10%;
+  test-22: 10% %10%;
+  test-23: 10%% 10%;
+  test-24: 10% % 10%;
+  test-25: 10%%10px;
+  test-26: 10% %10px;
+  test-27: 10%% 10px;
+  test-28: 10% % 10px;
+  test-29: 10%%#AAA;
+  test-30: 10% %#AAA;
+  test-31: 10%% #AAA;
+  test-32: 10% % #AAA;
+  test-33: 10%%#{itpl};
+  test-34: 10% %#{itpl};
+  test-35: 10%% #{itpl};
+  test-36: 10% % #{itpl};
+  test-37: 10px%10px;
+  test-38: 10px %10px;
+  test-39: 10px% 10px;
+  test-40: 10px % 10px;
+  test-41: 10px%#AAA;
+  test-42: 10px %#AAA;
+  test-43: 10px% #AAA;
+  test-44: 10px % #AAA;
+  test-45: 10px%#{itpl};
+  test-46: 10px %#{itpl};
+  test-47: 10px% #{itpl};
+  test-48: 10px % #{itpl};
+  test-49: #AAA%#AAA;
+  test-50: #AAA %#AAA;
+  test-51: #AAA% #AAA;
+  test-52: #AAA % #AAA;
+  test-53: #AAA%#{itpl};
+  test-54: #AAA %#{itpl};
+  test-55: #AAA% #{itpl};
+  test-56: #AAA % #{itpl};
+  test-57: #{itpl}%#{itpl};
+  test-58: #{itpl} %#{itpl};
+  test-59: #{itpl}% #{itpl};
+  test-60: #{itpl} % #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..662bbd7725
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10%10%10;
+  test-2: 10 %10 %10;
+  test-3: 10% 10% 10;
+  test-4: 10 % 10 % 10;
+  test-5: 10%10%10%;
+  test-6: 10 %10 %10%;
+  test-7: 10% 10% 10%;
+  test-8: 10 % 10 % 10%;
+  test-9: 10%10%10px;
+  test-10: 10 %10 %10px;
+  test-11: 10% 10% 10px;
+  test-12: 10 % 10 % 10px;
+  test-13: 10%10%#AAA;
+  test-14: 10 %10 %#AAA;
+  test-15: 10% 10% #AAA;
+  test-16: 10 % 10 % #AAA;
+  test-17: 10%10%#{itpl};
+  test-18: 10 %10 %#{itpl};
+  test-19: 10% 10% #{itpl};
+  test-20: 10 % 10 % #{itpl};
+  test-21: 10%10%%10%;
+  test-22: 10 %10% %10%;
+  test-23: 10% 10%% 10%;
+  test-24: 10 % 10% % 10%;
+  test-25: 10%10%%10px;
+  test-26: 10 %10% %10px;
+  test-27: 10% 10%% 10px;
+  test-28: 10 % 10% % 10px;
+  test-29: 10%10%%#AAA;
+  test-30: 10 %10% %#AAA;
+  test-31: 10% 10%% #AAA;
+  test-32: 10 % 10% % #AAA;
+  test-33: 10%10%%#{itpl};
+  test-34: 10 %10% %#{itpl};
+  test-35: 10% 10%% #{itpl};
+  test-36: 10 % 10% % #{itpl};
+  test-37: 10%10px%10px;
+  test-38: 10 %10px %10px;
+  test-39: 10% 10px% 10px;
+  test-40: 10 % 10px % 10px;
+  test-41: 10%10px%#AAA;
+  test-42: 10 %10px %#AAA;
+  test-43: 10% 10px% #AAA;
+  test-44: 10 % 10px % #AAA;
+  test-45: 10%10px%#{itpl};
+  test-46: 10 %10px %#{itpl};
+  test-47: 10% 10px% #{itpl};
+  test-48: 10 % 10px % #{itpl};
+  test-49: 10%#AAA%#AAA;
+  test-50: 10 %#AAA %#AAA;
+  test-51: 10% #AAA% #AAA;
+  test-52: 10 % #AAA % #AAA;
+  test-53: 10%#AAA%#{itpl};
+  test-54: 10 %#AAA %#{itpl};
+  test-55: 10% #AAA% #{itpl};
+  test-56: 10 % #AAA % #{itpl};
+  test-57: 10%#{itpl}%#{itpl};
+  test-58: 10 %#{itpl} %#{itpl};
+  test-59: 10% #{itpl}% #{itpl};
+  test-60: 10 % #{itpl} % #{itpl};
+  test-61: 10%%10%%10%;
+  test-62: 10% %10% %10%;
+  test-63: 10%% 10%% 10%;
+  test-64: 10% % 10% % 10%;
+  test-65: 10%%10%%10px;
+  test-66: 10% %10% %10px;
+  test-67: 10%% 10%% 10px;
+  test-68: 10% % 10% % 10px;
+  test-69: 10%%10%%#AAA;
+  test-70: 10% %10% %#AAA;
+  test-71: 10%% 10%% #AAA;
+  test-72: 10% % 10% % #AAA;
+  test-73: 10%%10%%#{itpl};
+  test-74: 10% %10% %#{itpl};
+  test-75: 10%% 10%% #{itpl};
+  test-76: 10% % 10% % #{itpl};
+  test-77: 10%%10px%10px;
+  test-78: 10% %10px %10px;
+  test-79: 10%% 10px% 10px;
+  test-80: 10% % 10px % 10px;
+  test-81: 10%%10px%#AAA;
+  test-82: 10% %10px %#AAA;
+  test-83: 10%% 10px% #AAA;
+  test-84: 10% % 10px % #AAA;
+  test-85: 10%%10px%#{itpl};
+  test-86: 10% %10px %#{itpl};
+  test-87: 10%% 10px% #{itpl};
+  test-88: 10% % 10px % #{itpl};
+  test-89: 10%%#AAA%#AAA;
+  test-90: 10% %#AAA %#AAA;
+  test-91: 10%% #AAA% #AAA;
+  test-92: 10% % #AAA % #AAA;
+  test-93: 10%%#AAA%#{itpl};
+  test-94: 10% %#AAA %#{itpl};
+  test-95: 10%% #AAA% #{itpl};
+  test-96: 10% % #AAA % #{itpl};
+  test-97: 10%%#{itpl}%#{itpl};
+  test-98: 10% %#{itpl} %#{itpl};
+  test-99: 10%% #{itpl}% #{itpl};
+  test-100: 10% % #{itpl} % #{itpl};
+  test-101: 10px%10px%10px;
+  test-102: 10px %10px %10px;
+  test-103: 10px% 10px% 10px;
+  test-104: 10px % 10px % 10px;
+  test-105: 10px%10px%#AAA;
+  test-106: 10px %10px %#AAA;
+  test-107: 10px% 10px% #AAA;
+  test-108: 10px % 10px % #AAA;
+  test-109: 10px%10px%#{itpl};
+  test-110: 10px %10px %#{itpl};
+  test-111: 10px% 10px% #{itpl};
+  test-112: 10px % 10px % #{itpl};
+  test-113: 10px%#AAA%#AAA;
+  test-114: 10px %#AAA %#AAA;
+  test-115: 10px% #AAA% #AAA;
+  test-116: 10px % #AAA % #AAA;
+  test-117: 10px%#AAA%#{itpl};
+  test-118: 10px %#AAA %#{itpl};
+  test-119: 10px% #AAA% #{itpl};
+  test-120: 10px % #AAA % #{itpl};
+  test-121: 10px%#{itpl}%#{itpl};
+  test-122: 10px %#{itpl} %#{itpl};
+  test-123: 10px% #{itpl}% #{itpl};
+  test-124: 10px % #{itpl} % #{itpl};
+  test-125: #AAA%#AAA%#AAA;
+  test-126: #AAA %#AAA %#AAA;
+  test-127: #AAA% #AAA% #AAA;
+  test-128: #AAA % #AAA % #AAA;
+  test-129: #AAA%#AAA%#{itpl};
+  test-130: #AAA %#AAA %#{itpl};
+  test-131: #AAA% #AAA% #{itpl};
+  test-132: #AAA % #AAA % #{itpl};
+  test-133: #AAA%#{itpl}%#{itpl};
+  test-134: #AAA %#{itpl} %#{itpl};
+  test-135: #AAA% #{itpl}% #{itpl};
+  test-136: #AAA % #{itpl} % #{itpl};
+  test-137: #{itpl}%#{itpl}%#{itpl};
+  test-138: #{itpl} %#{itpl} %#{itpl};
+  test-139: #{itpl}% #{itpl}% #{itpl};
+  test-140: #{itpl} % #{itpl} % #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..e04eefa872
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 10% 10; test-2: 0; test-3: 10% 10; test-4: 0; test-5: 10%10; test-6: 10 %10; test-7: 10% 10; test-8: 10 % 10; test-9: 10% 10; test-10: 00; test-11: 10% 10; test-12: 00; test-13: 10%10; test-14: 10 %10; test-15: 10% 10; test-16: 10 % 10; test-17: 10%10; test-18: 10 %10; test-19: 10% 10; test-20: 10 % 10; test-21: 10%10; test-22: 10 %10; test-23: 10% 10; test-24: 10 % 10; test-25: 10%10; test-26: 10 %10; test-27: 10% 10; test-28: 10 % 10; test-29: 10%10; test-30: 10 %10; test-31: 10% 10; test-32: 10 % 10; test-33: 10%10; test-34: 10 %10; test-35: 10% 10; test-36: 10 % 10; test-37: 10%10; test-38: 10 %10; test-39: 10% 10; test-40: 10 % 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..c89c2cfdbe
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:10% 10;test-2:0;test-3:10% 10;test-4:0;test-5:10%10;test-6:10 %10;test-7:10% 10;test-8:10 % 10;test-9:10% 10;test-10:00;test-11:10% 10;test-12:00;test-13:10%10;test-14:10 %10;test-15:10% 10;test-16:10 % 10;test-17:10%10;test-18:10 %10;test-19:10% 10;test-20:10 % 10;test-21:10%10;test-22:10 %10;test-23:10% 10;test-24:10 % 10;test-25:10%10;test-26:10 %10;test-27:10% 10;test-28:10 % 10;test-29:10%10;test-30:10 %10;test-31:10% 10;test-32:10 % 10;test-33:10%10;test-34:10 %10;test-35:10% 10;test-36:10 % 10;test-37:10%10;test-38:10 %10;test-39:10% 10;test-40:10 % 10}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..21edce05d8
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10% 10;
+  test-2: 0;
+  test-3: 10% 10;
+  test-4: 0;
+  test-5: 10%10;
+  test-6: 10 %10;
+  test-7: 10% 10;
+  test-8: 10 % 10;
+  test-9: 10% 10;
+  test-10: 00;
+  test-11: 10% 10;
+  test-12: 00;
+  test-13: 10%10;
+  test-14: 10 %10;
+  test-15: 10% 10;
+  test-16: 10 % 10;
+  test-17: 10%10;
+  test-18: 10 %10;
+  test-19: 10% 10;
+  test-20: 10 % 10;
+  test-21: 10%10;
+  test-22: 10 %10;
+  test-23: 10% 10;
+  test-24: 10 % 10;
+  test-25: 10%10;
+  test-26: 10 %10;
+  test-27: 10% 10;
+  test-28: 10 % 10;
+  test-29: 10%10;
+  test-30: 10 %10;
+  test-31: 10% 10;
+  test-32: 10 % 10;
+  test-33: 10%10;
+  test-34: 10 %10;
+  test-35: 10% 10;
+  test-36: 10 % 10;
+  test-37: 10%10;
+  test-38: 10 %10;
+  test-39: 10% 10;
+  test-40: 10 % 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..44e55b0b1b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: 10% 10;
+  test-2: 0;
+  test-3: 10% 10;
+  test-4: 0;
+  test-5: 10%10;
+  test-6: 10 %10;
+  test-7: 10% 10;
+  test-8: 10 % 10;
+  test-9: 10% 10;
+  test-10: 00;
+  test-11: 10% 10;
+  test-12: 00;
+  test-13: 10%10;
+  test-14: 10 %10;
+  test-15: 10% 10;
+  test-16: 10 % 10;
+  test-17: 10%10;
+  test-18: 10 %10;
+  test-19: 10% 10;
+  test-20: 10 % 10;
+  test-21: 10%10;
+  test-22: 10 %10;
+  test-23: 10% 10;
+  test-24: 10 % 10;
+  test-25: 10%10;
+  test-26: 10 %10;
+  test-27: 10% 10;
+  test-28: 10 % 10;
+  test-29: 10%10;
+  test-30: 10 %10;
+  test-31: 10% 10;
+  test-32: 10 % 10;
+  test-33: 10%10;
+  test-34: 10 %10;
+  test-35: 10% 10;
+  test-36: 10 % 10;
+  test-37: 10%10;
+  test-38: 10 %10;
+  test-39: 10% 10;
+  test-40: 10 % 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/input.scss
new file mode 100644
index 0000000000..ca70794bda
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10%10;
+  test-2: 10 %10;
+  test-3: 10% 10;
+  test-4: 10 % 10;
+  test-5: 10%#{10};
+  test-6: 10 %#{10};
+  test-7: 10% #{10};
+  test-8: 10 % #{10};
+  test-9: 10%1#{0};
+  test-10: 10 %1#{0};
+  test-11: 10% 1#{0};
+  test-12: 10 % 1#{0};
+  test-13: 10%#{1}0;
+  test-14: 10 %#{1}0;
+  test-15: 10% #{1}0;
+  test-16: 10 % #{1}0;
+  test-17: #{10}%#{10};
+  test-18: #{10} %#{10};
+  test-19: #{10}% #{10};
+  test-20: #{10} % #{10};
+  test-21: #{10}%1#{0};
+  test-22: #{10} %1#{0};
+  test-23: #{10}% 1#{0};
+  test-24: #{10} % 1#{0};
+  test-25: #{10}%#{1}0;
+  test-26: #{10} %#{1}0;
+  test-27: #{10}% #{1}0;
+  test-28: #{10} % #{1}0;
+  test-29: 1#{0}%1#{0};
+  test-30: 1#{0} %1#{0};
+  test-31: 1#{0}% 1#{0};
+  test-32: 1#{0} % 1#{0};
+  test-33: 1#{0}%#{1}0;
+  test-34: 1#{0} %#{1}0;
+  test-35: 1#{0}% #{1}0;
+  test-36: 1#{0} % #{1}0;
+  test-37: #{1}0%#{1}0;
+  test-38: #{1}0 %#{1}0;
+  test-39: #{1}0% #{1}0;
+  test-40: #{1}0 % #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..68a5a3a6d3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10%10%10;
+  test-2: 10 %10 %10;
+  test-3: 10% 10% 10;
+  test-4: 10 % 10 % 10;
+  test-5: 10%10%#{10};
+  test-6: 10 %10 %#{10};
+  test-7: 10% 10% #{10};
+  test-8: 10 % 10 % #{10};
+  test-9: 10%10%1#{0};
+  test-10: 10 %10 %1#{0};
+  test-11: 10% 10% 1#{0};
+  test-12: 10 % 10 % 1#{0};
+  test-13: 10%10%#{1}0;
+  test-14: 10 %10 %#{1}0;
+  test-15: 10% 10% #{1}0;
+  test-16: 10 % 10 % #{1}0;
+  test-17: 10%#{10}%#{10};
+  test-18: 10 %#{10} %#{10};
+  test-19: 10% #{10}% #{10};
+  test-20: 10 % #{10} % #{10};
+  test-21: 10%#{10}%1#{0};
+  test-22: 10 %#{10} %1#{0};
+  test-23: 10% #{10}% 1#{0};
+  test-24: 10 % #{10} % 1#{0};
+  test-25: 10%#{10}%#{1}0;
+  test-26: 10 %#{10} %#{1}0;
+  test-27: 10% #{10}% #{1}0;
+  test-28: 10 % #{10} % #{1}0;
+  test-29: 10%1#{0}%1#{0};
+  test-30: 10 %1#{0} %1#{0};
+  test-31: 10% 1#{0}% 1#{0};
+  test-32: 10 % 1#{0} % 1#{0};
+  test-33: 10%1#{0}%#{1}0;
+  test-34: 10 %1#{0} %#{1}0;
+  test-35: 10% 1#{0}% #{1}0;
+  test-36: 10 % 1#{0} % #{1}0;
+  test-37: 10%#{1}0%#{1}0;
+  test-38: 10 %#{1}0 %#{1}0;
+  test-39: 10% #{1}0% #{1}0;
+  test-40: 10 % #{1}0 % #{1}0;
+  test-41: #{10}%#{10}%#{10};
+  test-42: #{10} %#{10} %#{10};
+  test-43: #{10}% #{10}% #{10};
+  test-44: #{10} % #{10} % #{10};
+  test-45: #{10}%#{10}%1#{0};
+  test-46: #{10} %#{10} %1#{0};
+  test-47: #{10}% #{10}% 1#{0};
+  test-48: #{10} % #{10} % 1#{0};
+  test-49: #{10}%#{10}%#{1}0;
+  test-50: #{10} %#{10} %#{1}0;
+  test-51: #{10}% #{10}% #{1}0;
+  test-52: #{10} % #{10} % #{1}0;
+  test-53: #{10}%1#{0}%1#{0};
+  test-54: #{10} %1#{0} %1#{0};
+  test-55: #{10}% 1#{0}% 1#{0};
+  test-56: #{10} % 1#{0} % 1#{0};
+  test-57: #{10}%1#{0}%#{1}0;
+  test-58: #{10} %1#{0} %#{1}0;
+  test-59: #{10}% 1#{0}% #{1}0;
+  test-60: #{10} % 1#{0} % #{1}0;
+  test-61: #{10}%#{1}0%#{1}0;
+  test-62: #{10} %#{1}0 %#{1}0;
+  test-63: #{10}% #{1}0% #{1}0;
+  test-64: #{10} % #{1}0 % #{1}0;
+  test-65: 1#{0}%1#{0}%1#{0};
+  test-66: 1#{0} %1#{0} %1#{0};
+  test-67: 1#{0}% 1#{0}% 1#{0};
+  test-68: 1#{0} % 1#{0} % 1#{0};
+  test-69: 1#{0}%1#{0}%#{1}0;
+  test-70: 1#{0} %1#{0} %#{1}0;
+  test-71: 1#{0}% 1#{0}% #{1}0;
+  test-72: 1#{0} % 1#{0} % #{1}0;
+  test-73: 1#{0}%#{1}0%#{1}0;
+  test-74: 1#{0} %#{1}0 %#{1}0;
+  test-75: 1#{0}% #{1}0% #{1}0;
+  test-76: 1#{0} % #{1}0 % #{1}0;
+  test-77: #{1}0%#{1}0%#{1}0;
+  test-78: #{1}0 %#{1}0 %#{1}0;
+  test-79: #{1}0% #{1}0% #{1}0;
+  test-80: #{1}0 % #{1}0 % #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..1383e095b1
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant%interpolant; test-38: interpolant %interpolant; test-39: interpolant% interpolant; test-40: interpolant % interpolant; test-41: interpolant%lschema_ritlp; test-42: interpolant %lschema_ritlp; test-43: interpolant% lschema_ritlp; test-44: interpolant % lschema_ritlp; test-45: interpolant%litlp_rschema; test-46: interpolant %litlp_rschema; test-47: interpolant% litlp_rschema; test-48: interpolant % litlp_rschema; test-49: lschema_ritlp%lschema_ritlp; test-50: lschema_ritlp %lschema_ritlp; test-51: lschema_ritlp% lschema_ritlp; test-52: lschema_ritlp % lschema_ritlp; test-53: lschema_ritlp%litlp_rschema; test-54: lschema_ritlp %litlp_rschema; test-55: lschema_ritlp% litlp_rschema; test-56: lschema_ritlp % litlp_rschema; test-57: litlp_rschema%litlp_rschema; test-58: litlp_rschema %litlp_rschema; test-59: litlp_rschema% litlp_rschema; test-60: litlp_rschema % litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..8868e576f8
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant%interpolant;test-38:interpolant %interpolant;test-39:interpolant% interpolant;test-40:interpolant % interpolant;test-41:interpolant%lschema_ritlp;test-42:interpolant %lschema_ritlp;test-43:interpolant% lschema_ritlp;test-44:interpolant % lschema_ritlp;test-45:interpolant%litlp_rschema;test-46:interpolant %litlp_rschema;test-47:interpolant% litlp_rschema;test-48:interpolant % litlp_rschema;test-49:lschema_ritlp%lschema_ritlp;test-50:lschema_ritlp %lschema_ritlp;test-51:lschema_ritlp% lschema_ritlp;test-52:lschema_ritlp % lschema_ritlp;test-53:lschema_ritlp%litlp_rschema;test-54:lschema_ritlp %litlp_rschema;test-55:lschema_ritlp% litlp_rschema;test-56:lschema_ritlp % litlp_rschema;test-57:litlp_rschema%litlp_rschema;test-58:litlp_rschema %litlp_rschema;test-59:litlp_rschema% litlp_rschema;test-60:litlp_rschema % litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..e659ae5b79
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant%interpolant;
+  test-38: interpolant %interpolant;
+  test-39: interpolant% interpolant;
+  test-40: interpolant % interpolant;
+  test-41: interpolant%lschema_ritlp;
+  test-42: interpolant %lschema_ritlp;
+  test-43: interpolant% lschema_ritlp;
+  test-44: interpolant % lschema_ritlp;
+  test-45: interpolant%litlp_rschema;
+  test-46: interpolant %litlp_rschema;
+  test-47: interpolant% litlp_rschema;
+  test-48: interpolant % litlp_rschema;
+  test-49: lschema_ritlp%lschema_ritlp;
+  test-50: lschema_ritlp %lschema_ritlp;
+  test-51: lschema_ritlp% lschema_ritlp;
+  test-52: lschema_ritlp % lschema_ritlp;
+  test-53: lschema_ritlp%litlp_rschema;
+  test-54: lschema_ritlp %litlp_rschema;
+  test-55: lschema_ritlp% litlp_rschema;
+  test-56: lschema_ritlp % litlp_rschema;
+  test-57: litlp_rschema%litlp_rschema;
+  test-58: litlp_rschema %litlp_rschema;
+  test-59: litlp_rschema% litlp_rschema;
+  test-60: litlp_rschema % litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..90b8eed1e7
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant%interpolant;
+  test-38: interpolant %interpolant;
+  test-39: interpolant% interpolant;
+  test-40: interpolant % interpolant;
+  test-41: interpolant%lschema_ritlp;
+  test-42: interpolant %lschema_ritlp;
+  test-43: interpolant% lschema_ritlp;
+  test-44: interpolant % lschema_ritlp;
+  test-45: interpolant%litlp_rschema;
+  test-46: interpolant %litlp_rschema;
+  test-47: interpolant% litlp_rschema;
+  test-48: interpolant % litlp_rschema;
+  test-49: lschema_ritlp%lschema_ritlp;
+  test-50: lschema_ritlp %lschema_ritlp;
+  test-51: lschema_ritlp% lschema_ritlp;
+  test-52: lschema_ritlp % lschema_ritlp;
+  test-53: lschema_ritlp%litlp_rschema;
+  test-54: lschema_ritlp %litlp_rschema;
+  test-55: lschema_ritlp% litlp_rschema;
+  test-56: lschema_ritlp % litlp_rschema;
+  test-57: litlp_rschema%litlp_rschema;
+  test-58: litlp_rschema %litlp_rschema;
+  test-59: litlp_rschema% litlp_rschema;
+  test-60: litlp_rschema % litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/input.scss
new file mode 100644
index 0000000000..a583ec0b24
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}%#{interpolant};
+  test-38: #{interpolant} %#{interpolant};
+  test-39: #{interpolant}% #{interpolant};
+  test-40: #{interpolant} % #{interpolant};
+  test-41: #{interpolant}%lschema_#{ritlp};
+  test-42: #{interpolant} %lschema_#{ritlp};
+  test-43: #{interpolant}% lschema_#{ritlp};
+  test-44: #{interpolant} % lschema_#{ritlp};
+  test-45: #{interpolant}%#{litlp}_rschema;
+  test-46: #{interpolant} %#{litlp}_rschema;
+  test-47: #{interpolant}% #{litlp}_rschema;
+  test-48: #{interpolant} % #{litlp}_rschema;
+  test-49: lschema_#{ritlp}%lschema_#{ritlp};
+  test-50: lschema_#{ritlp} %lschema_#{ritlp};
+  test-51: lschema_#{ritlp}% lschema_#{ritlp};
+  test-52: lschema_#{ritlp} % lschema_#{ritlp};
+  test-53: lschema_#{ritlp}%#{litlp}_rschema;
+  test-54: lschema_#{ritlp} %#{litlp}_rschema;
+  test-55: lschema_#{ritlp}% #{litlp}_rschema;
+  test-56: lschema_#{ritlp} % #{litlp}_rschema;
+  test-57: #{litlp}_rschema%#{litlp}_rschema;
+  test-58: #{litlp}_rschema %#{litlp}_rschema;
+  test-59: #{litlp}_rschema% #{litlp}_rschema;
+  test-60: #{litlp}_rschema % #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/modulo/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/modulo/strings/tripplets/input.scss
new file mode 100644
index 0000000000..9698f637cd
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/modulo/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal%literal%literal;
+  test-2: literal %literal %literal;
+  test-3: literal% literal% literal;
+  test-4: literal % literal % literal;
+  test-5: literal%literal%"quoted";
+  test-6: literal %literal %"quoted";
+  test-7: literal% literal% "quoted";
+  test-8: literal % literal % "quoted";
+  test-9: literal%literal%#{interpolant};
+  test-10: literal %literal %#{interpolant};
+  test-11: literal% literal% #{interpolant};
+  test-12: literal % literal % #{interpolant};
+  test-13: literal%literal%lschema_#{ritlp};
+  test-14: literal %literal %lschema_#{ritlp};
+  test-15: literal% literal% lschema_#{ritlp};
+  test-16: literal % literal % lschema_#{ritlp};
+  test-17: literal%literal%#{litlp}_rschema;
+  test-18: literal %literal %#{litlp}_rschema;
+  test-19: literal% literal% #{litlp}_rschema;
+  test-20: literal % literal % #{litlp}_rschema;
+  test-21: literal%"quoted"%"quoted";
+  test-22: literal %"quoted" %"quoted";
+  test-23: literal% "quoted"% "quoted";
+  test-24: literal % "quoted" % "quoted";
+  test-25: literal%"quoted"%#{interpolant};
+  test-26: literal %"quoted" %#{interpolant};
+  test-27: literal% "quoted"% #{interpolant};
+  test-28: literal % "quoted" % #{interpolant};
+  test-29: literal%"quoted"%lschema_#{ritlp};
+  test-30: literal %"quoted" %lschema_#{ritlp};
+  test-31: literal% "quoted"% lschema_#{ritlp};
+  test-32: literal % "quoted" % lschema_#{ritlp};
+  test-33: literal%"quoted"%#{litlp}_rschema;
+  test-34: literal %"quoted" %#{litlp}_rschema;
+  test-35: literal% "quoted"% #{litlp}_rschema;
+  test-36: literal % "quoted" % #{litlp}_rschema;
+  test-37: literal%#{interpolant}%#{interpolant};
+  test-38: literal %#{interpolant} %#{interpolant};
+  test-39: literal% #{interpolant}% #{interpolant};
+  test-40: literal % #{interpolant} % #{interpolant};
+  test-41: literal%#{interpolant}%lschema_#{ritlp};
+  test-42: literal %#{interpolant} %lschema_#{ritlp};
+  test-43: literal% #{interpolant}% lschema_#{ritlp};
+  test-44: literal % #{interpolant} % lschema_#{ritlp};
+  test-45: literal%#{interpolant}%#{litlp}_rschema;
+  test-46: literal %#{interpolant} %#{litlp}_rschema;
+  test-47: literal% #{interpolant}% #{litlp}_rschema;
+  test-48: literal % #{interpolant} % #{litlp}_rschema;
+  test-49: literal%lschema_#{ritlp}%lschema_#{ritlp};
+  test-50: literal %lschema_#{ritlp} %lschema_#{ritlp};
+  test-51: literal% lschema_#{ritlp}% lschema_#{ritlp};
+  test-52: literal % lschema_#{ritlp} % lschema_#{ritlp};
+  test-53: literal%lschema_#{ritlp}%#{litlp}_rschema;
+  test-54: literal %lschema_#{ritlp} %#{litlp}_rschema;
+  test-55: literal% lschema_#{ritlp}% #{litlp}_rschema;
+  test-56: literal % lschema_#{ritlp} % #{litlp}_rschema;
+  test-57: literal%#{litlp}_rschema%#{litlp}_rschema;
+  test-58: literal %#{litlp}_rschema %#{litlp}_rschema;
+  test-59: literal% #{litlp}_rschema% #{litlp}_rschema;
+  test-60: literal % #{litlp}_rschema % #{litlp}_rschema;
+  test-61: "quoted"%"quoted"%"quoted";
+  test-62: "quoted" %"quoted" %"quoted";
+  test-63: "quoted"% "quoted"% "quoted";
+  test-64: "quoted" % "quoted" % "quoted";
+  test-65: "quoted"%"quoted"%#{interpolant};
+  test-66: "quoted" %"quoted" %#{interpolant};
+  test-67: "quoted"% "quoted"% #{interpolant};
+  test-68: "quoted" % "quoted" % #{interpolant};
+  test-69: "quoted"%"quoted"%lschema_#{ritlp};
+  test-70: "quoted" %"quoted" %lschema_#{ritlp};
+  test-71: "quoted"% "quoted"% lschema_#{ritlp};
+  test-72: "quoted" % "quoted" % lschema_#{ritlp};
+  test-73: "quoted"%"quoted"%#{litlp}_rschema;
+  test-74: "quoted" %"quoted" %#{litlp}_rschema;
+  test-75: "quoted"% "quoted"% #{litlp}_rschema;
+  test-76: "quoted" % "quoted" % #{litlp}_rschema;
+  test-77: "quoted"%#{interpolant}%#{interpolant};
+  test-78: "quoted" %#{interpolant} %#{interpolant};
+  test-79: "quoted"% #{interpolant}% #{interpolant};
+  test-80: "quoted" % #{interpolant} % #{interpolant};
+  test-81: "quoted"%#{interpolant}%lschema_#{ritlp};
+  test-82: "quoted" %#{interpolant} %lschema_#{ritlp};
+  test-83: "quoted"% #{interpolant}% lschema_#{ritlp};
+  test-84: "quoted" % #{interpolant} % lschema_#{ritlp};
+  test-85: "quoted"%#{interpolant}%#{litlp}_rschema;
+  test-86: "quoted" %#{interpolant} %#{litlp}_rschema;
+  test-87: "quoted"% #{interpolant}% #{litlp}_rschema;
+  test-88: "quoted" % #{interpolant} % #{litlp}_rschema;
+  test-89: "quoted"%lschema_#{ritlp}%lschema_#{ritlp};
+  test-90: "quoted" %lschema_#{ritlp} %lschema_#{ritlp};
+  test-91: "quoted"% lschema_#{ritlp}% lschema_#{ritlp};
+  test-92: "quoted" % lschema_#{ritlp} % lschema_#{ritlp};
+  test-93: "quoted"%lschema_#{ritlp}%#{litlp}_rschema;
+  test-94: "quoted" %lschema_#{ritlp} %#{litlp}_rschema;
+  test-95: "quoted"% lschema_#{ritlp}% #{litlp}_rschema;
+  test-96: "quoted" % lschema_#{ritlp} % #{litlp}_rschema;
+  test-97: "quoted"%#{litlp}_rschema%#{litlp}_rschema;
+  test-98: "quoted" %#{litlp}_rschema %#{litlp}_rschema;
+  test-99: "quoted"% #{litlp}_rschema% #{litlp}_rschema;
+  test-100: "quoted" % #{litlp}_rschema % #{litlp}_rschema;
+  test-101: #{interpolant}%#{interpolant}%#{interpolant};
+  test-102: #{interpolant} %#{interpolant} %#{interpolant};
+  test-103: #{interpolant}% #{interpolant}% #{interpolant};
+  test-104: #{interpolant} % #{interpolant} % #{interpolant};
+  test-105: #{interpolant}%#{interpolant}%lschema_#{ritlp};
+  test-106: #{interpolant} %#{interpolant} %lschema_#{ritlp};
+  test-107: #{interpolant}% #{interpolant}% lschema_#{ritlp};
+  test-108: #{interpolant} % #{interpolant} % lschema_#{ritlp};
+  test-109: #{interpolant}%#{interpolant}%#{litlp}_rschema;
+  test-110: #{interpolant} %#{interpolant} %#{litlp}_rschema;
+  test-111: #{interpolant}% #{interpolant}% #{litlp}_rschema;
+  test-112: #{interpolant} % #{interpolant} % #{litlp}_rschema;
+  test-113: #{interpolant}%lschema_#{ritlp}%lschema_#{ritlp};
+  test-114: #{interpolant} %lschema_#{ritlp} %lschema_#{ritlp};
+  test-115: #{interpolant}% lschema_#{ritlp}% lschema_#{ritlp};
+  test-116: #{interpolant} % lschema_#{ritlp} % lschema_#{ritlp};
+  test-117: #{interpolant}%lschema_#{ritlp}%#{litlp}_rschema;
+  test-118: #{interpolant} %lschema_#{ritlp} %#{litlp}_rschema;
+  test-119: #{interpolant}% lschema_#{ritlp}% #{litlp}_rschema;
+  test-120: #{interpolant} % lschema_#{ritlp} % #{litlp}_rschema;
+  test-121: #{interpolant}%#{litlp}_rschema%#{litlp}_rschema;
+  test-122: #{interpolant} %#{litlp}_rschema %#{litlp}_rschema;
+  test-123: #{interpolant}% #{litlp}_rschema% #{litlp}_rschema;
+  test-124: #{interpolant} % #{litlp}_rschema % #{litlp}_rschema;
+  test-125: lschema_#{ritlp}%lschema_#{ritlp}%lschema_#{ritlp};
+  test-126: lschema_#{ritlp} %lschema_#{ritlp} %lschema_#{ritlp};
+  test-127: lschema_#{ritlp}% lschema_#{ritlp}% lschema_#{ritlp};
+  test-128: lschema_#{ritlp} % lschema_#{ritlp} % lschema_#{ritlp};
+  test-129: lschema_#{ritlp}%lschema_#{ritlp}%#{litlp}_rschema;
+  test-130: lschema_#{ritlp} %lschema_#{ritlp} %#{litlp}_rschema;
+  test-131: lschema_#{ritlp}% lschema_#{ritlp}% #{litlp}_rschema;
+  test-132: lschema_#{ritlp} % lschema_#{ritlp} % #{litlp}_rschema;
+  test-133: lschema_#{ritlp}%#{litlp}_rschema%#{litlp}_rschema;
+  test-134: lschema_#{ritlp} %#{litlp}_rschema %#{litlp}_rschema;
+  test-135: lschema_#{ritlp}% #{litlp}_rschema% #{litlp}_rschema;
+  test-136: lschema_#{ritlp} % #{litlp}_rschema % #{litlp}_rschema;
+  test-137: #{litlp}_rschema%#{litlp}_rschema%#{litlp}_rschema;
+  test-138: #{litlp}_rschema %#{litlp}_rschema %#{litlp}_rschema;
+  test-139: #{litlp}_rschema% #{litlp}_rschema% #{litlp}_rschema;
+  test-140: #{litlp}_rschema % #{litlp}_rschema % #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..c95d24802f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10*10*10;
+  test-2: 10 *10 *10;
+  test-3: 10* 10* 10;
+  test-4: 10 * 10 * 10;
+  test-5: 10*10*10px;
+  test-6: 10 *10 *10px;
+  test-7: 10* 10* 10px;
+  test-8: 10 * 10 * 10px;
+  test-9: 10*10*#{10}px;
+  test-10: 10 *10 *#{10}px;
+  test-11: 10* 10* #{10}px;
+  test-12: 10 * 10 * #{10}px;
+  test-13: 10*10*1#{0}px;
+  test-14: 10 *10 *1#{0}px;
+  test-15: 10* 10* 1#{0}px;
+  test-16: 10 * 10 * 1#{0}px;
+  test-17: 10*10*10#{px};
+  test-18: 10 *10 *10#{px};
+  test-19: 10* 10* 10#{px};
+  test-20: 10 * 10 * 10#{px};
+  test-21: 10*10*10#{p}x;
+  test-22: 10 *10 *10#{p}x;
+  test-23: 10* 10* 10#{p}x;
+  test-24: 10 * 10 * 10#{p}x;
+  test-25: 10*10px*10px;
+  test-26: 10 *10px *10px;
+  test-27: 10* 10px* 10px;
+  test-28: 10 * 10px * 10px;
+  test-29: 10*10px*#{10}px;
+  test-30: 10 *10px *#{10}px;
+  test-31: 10* 10px* #{10}px;
+  test-32: 10 * 10px * #{10}px;
+  test-33: 10*10px*1#{0}px;
+  test-34: 10 *10px *1#{0}px;
+  test-35: 10* 10px* 1#{0}px;
+  test-36: 10 * 10px * 1#{0}px;
+  test-37: 10*10px*10#{px};
+  test-38: 10 *10px *10#{px};
+  test-39: 10* 10px* 10#{px};
+  test-40: 10 * 10px * 10#{px};
+  test-41: 10*10px*10#{p}x;
+  test-42: 10 *10px *10#{p}x;
+  test-43: 10* 10px* 10#{p}x;
+  test-44: 10 * 10px * 10#{p}x;
+  test-45: 10*#{10}px*#{10}px;
+  test-46: 10 *#{10}px *#{10}px;
+  test-47: 10* #{10}px* #{10}px;
+  test-48: 10 * #{10}px * #{10}px;
+  test-49: 10*#{10}px*1#{0}px;
+  test-50: 10 *#{10}px *1#{0}px;
+  test-51: 10* #{10}px* 1#{0}px;
+  test-52: 10 * #{10}px * 1#{0}px;
+  test-53: 10*#{10}px*10#{px};
+  test-54: 10 *#{10}px *10#{px};
+  test-55: 10* #{10}px* 10#{px};
+  test-56: 10 * #{10}px * 10#{px};
+  test-57: 10*#{10}px*10#{p}x;
+  test-58: 10 *#{10}px *10#{p}x;
+  test-59: 10* #{10}px* 10#{p}x;
+  test-60: 10 * #{10}px * 10#{p}x;
+  test-61: 10*1#{0}px*1#{0}px;
+  test-62: 10 *1#{0}px *1#{0}px;
+  test-63: 10* 1#{0}px* 1#{0}px;
+  test-64: 10 * 1#{0}px * 1#{0}px;
+  test-65: 10*1#{0}px*10#{px};
+  test-66: 10 *1#{0}px *10#{px};
+  test-67: 10* 1#{0}px* 10#{px};
+  test-68: 10 * 1#{0}px * 10#{px};
+  test-69: 10*1#{0}px*10#{p}x;
+  test-70: 10 *1#{0}px *10#{p}x;
+  test-71: 10* 1#{0}px* 10#{p}x;
+  test-72: 10 * 1#{0}px * 10#{p}x;
+  test-73: 10*10#{px}*10#{px};
+  test-74: 10 *10#{px} *10#{px};
+  test-75: 10* 10#{px}* 10#{px};
+  test-76: 10 * 10#{px} * 10#{px};
+  test-77: 10*10#{px}*10#{p}x;
+  test-78: 10 *10#{px} *10#{p}x;
+  test-79: 10* 10#{px}* 10#{p}x;
+  test-80: 10 * 10#{px} * 10#{p}x;
+  test-81: 10*10#{p}x*10#{p}x;
+  test-82: 10 *10#{p}x *10#{p}x;
+  test-83: 10* 10#{p}x* 10#{p}x;
+  test-84: 10 * 10#{p}x * 10#{p}x;
+  test-85: 10px*10px*10px;
+  test-86: 10px *10px *10px;
+  test-87: 10px* 10px* 10px;
+  test-88: 10px * 10px * 10px;
+  test-89: 10px*10px*#{10}px;
+  test-90: 10px *10px *#{10}px;
+  test-91: 10px* 10px* #{10}px;
+  test-92: 10px * 10px * #{10}px;
+  test-93: 10px*10px*1#{0}px;
+  test-94: 10px *10px *1#{0}px;
+  test-95: 10px* 10px* 1#{0}px;
+  test-96: 10px * 10px * 1#{0}px;
+  test-97: 10px*10px*10#{px};
+  test-98: 10px *10px *10#{px};
+  test-99: 10px* 10px* 10#{px};
+  test-100: 10px * 10px * 10#{px};
+  test-101: 10px*10px*10#{p}x;
+  test-102: 10px *10px *10#{p}x;
+  test-103: 10px* 10px* 10#{p}x;
+  test-104: 10px * 10px * 10#{p}x;
+  test-105: 10px*#{10}px*#{10}px;
+  test-106: 10px *#{10}px *#{10}px;
+  test-107: 10px* #{10}px* #{10}px;
+  test-108: 10px * #{10}px * #{10}px;
+  test-109: 10px*#{10}px*1#{0}px;
+  test-110: 10px *#{10}px *1#{0}px;
+  test-111: 10px* #{10}px* 1#{0}px;
+  test-112: 10px * #{10}px * 1#{0}px;
+  test-113: 10px*#{10}px*10#{px};
+  test-114: 10px *#{10}px *10#{px};
+  test-115: 10px* #{10}px* 10#{px};
+  test-116: 10px * #{10}px * 10#{px};
+  test-117: 10px*#{10}px*10#{p}x;
+  test-118: 10px *#{10}px *10#{p}x;
+  test-119: 10px* #{10}px* 10#{p}x;
+  test-120: 10px * #{10}px * 10#{p}x;
+  test-121: 10px*1#{0}px*1#{0}px;
+  test-122: 10px *1#{0}px *1#{0}px;
+  test-123: 10px* 1#{0}px* 1#{0}px;
+  test-124: 10px * 1#{0}px * 1#{0}px;
+  test-125: 10px*1#{0}px*10#{px};
+  test-126: 10px *1#{0}px *10#{px};
+  test-127: 10px* 1#{0}px* 10#{px};
+  test-128: 10px * 1#{0}px * 10#{px};
+  test-129: 10px*1#{0}px*10#{p}x;
+  test-130: 10px *1#{0}px *10#{p}x;
+  test-131: 10px* 1#{0}px* 10#{p}x;
+  test-132: 10px * 1#{0}px * 10#{p}x;
+  test-133: 10px*10#{px}*10#{px};
+  test-134: 10px *10#{px} *10#{px};
+  test-135: 10px* 10#{px}* 10#{px};
+  test-136: 10px * 10#{px} * 10#{px};
+  test-137: 10px*10#{px}*10#{p}x;
+  test-138: 10px *10#{px} *10#{p}x;
+  test-139: 10px* 10#{px}* 10#{p}x;
+  test-140: 10px * 10#{px} * 10#{p}x;
+  test-141: 10px*10#{p}x*10#{p}x;
+  test-142: 10px *10#{p}x *10#{p}x;
+  test-143: 10px* 10#{p}x* 10#{p}x;
+  test-144: 10px * 10#{p}x * 10#{p}x;
+  test-145: #{10}px*#{10}px*#{10}px;
+  test-146: #{10}px *#{10}px *#{10}px;
+  test-147: #{10}px* #{10}px* #{10}px;
+  test-148: #{10}px * #{10}px * #{10}px;
+  test-149: #{10}px*#{10}px*1#{0}px;
+  test-150: #{10}px *#{10}px *1#{0}px;
+  test-151: #{10}px* #{10}px* 1#{0}px;
+  test-152: #{10}px * #{10}px * 1#{0}px;
+  test-153: #{10}px*#{10}px*10#{px};
+  test-154: #{10}px *#{10}px *10#{px};
+  test-155: #{10}px* #{10}px* 10#{px};
+  test-156: #{10}px * #{10}px * 10#{px};
+  test-157: #{10}px*#{10}px*10#{p}x;
+  test-158: #{10}px *#{10}px *10#{p}x;
+  test-159: #{10}px* #{10}px* 10#{p}x;
+  test-160: #{10}px * #{10}px * 10#{p}x;
+  test-161: #{10}px*1#{0}px*1#{0}px;
+  test-162: #{10}px *1#{0}px *1#{0}px;
+  test-163: #{10}px* 1#{0}px* 1#{0}px;
+  test-164: #{10}px * 1#{0}px * 1#{0}px;
+  test-165: #{10}px*1#{0}px*10#{px};
+  test-166: #{10}px *1#{0}px *10#{px};
+  test-167: #{10}px* 1#{0}px* 10#{px};
+  test-168: #{10}px * 1#{0}px * 10#{px};
+  test-169: #{10}px*1#{0}px*10#{p}x;
+  test-170: #{10}px *1#{0}px *10#{p}x;
+  test-171: #{10}px* 1#{0}px* 10#{p}x;
+  test-172: #{10}px * 1#{0}px * 10#{p}x;
+  test-173: #{10}px*10#{px}*10#{px};
+  test-174: #{10}px *10#{px} *10#{px};
+  test-175: #{10}px* 10#{px}* 10#{px};
+  test-176: #{10}px * 10#{px} * 10#{px};
+  test-177: #{10}px*10#{px}*10#{p}x;
+  test-178: #{10}px *10#{px} *10#{p}x;
+  test-179: #{10}px* 10#{px}* 10#{p}x;
+  test-180: #{10}px * 10#{px} * 10#{p}x;
+  test-181: #{10}px*10#{p}x*10#{p}x;
+  test-182: #{10}px *10#{p}x *10#{p}x;
+  test-183: #{10}px* 10#{p}x* 10#{p}x;
+  test-184: #{10}px * 10#{p}x * 10#{p}x;
+  test-185: 1#{0}px*1#{0}px*1#{0}px;
+  test-186: 1#{0}px *1#{0}px *1#{0}px;
+  test-187: 1#{0}px* 1#{0}px* 1#{0}px;
+  test-188: 1#{0}px * 1#{0}px * 1#{0}px;
+  test-189: 1#{0}px*1#{0}px*10#{px};
+  test-190: 1#{0}px *1#{0}px *10#{px};
+  test-191: 1#{0}px* 1#{0}px* 10#{px};
+  test-192: 1#{0}px * 1#{0}px * 10#{px};
+  test-193: 1#{0}px*1#{0}px*10#{p}x;
+  test-194: 1#{0}px *1#{0}px *10#{p}x;
+  test-195: 1#{0}px* 1#{0}px* 10#{p}x;
+  test-196: 1#{0}px * 1#{0}px * 10#{p}x;
+  test-197: 1#{0}px*10#{px}*10#{px};
+  test-198: 1#{0}px *10#{px} *10#{px};
+  test-199: 1#{0}px* 10#{px}* 10#{px};
+  test-200: 1#{0}px * 10#{px} * 10#{px};
+  test-201: 1#{0}px*10#{px}*10#{p}x;
+  test-202: 1#{0}px *10#{px} *10#{p}x;
+  test-203: 1#{0}px* 10#{px}* 10#{p}x;
+  test-204: 1#{0}px * 10#{px} * 10#{p}x;
+  test-205: 1#{0}px*10#{p}x*10#{p}x;
+  test-206: 1#{0}px *10#{p}x *10#{p}x;
+  test-207: 1#{0}px* 10#{p}x* 10#{p}x;
+  test-208: 1#{0}px * 10#{p}x * 10#{p}x;
+  test-209: 10#{px}*10#{px}*10#{px};
+  test-210: 10#{px} *10#{px} *10#{px};
+  test-211: 10#{px}* 10#{px}* 10#{px};
+  test-212: 10#{px} * 10#{px} * 10#{px};
+  test-213: 10#{px}*10#{px}*10#{p}x;
+  test-214: 10#{px} *10#{px} *10#{p}x;
+  test-215: 10#{px}* 10#{px}* 10#{p}x;
+  test-216: 10#{px} * 10#{px} * 10#{p}x;
+  test-217: 10#{px}*10#{p}x*10#{p}x;
+  test-218: 10#{px} *10#{p}x *10#{p}x;
+  test-219: 10#{px}* 10#{p}x* 10#{p}x;
+  test-220: 10#{px} * 10#{p}x * 10#{p}x;
+  test-221: 10#{p}x*10#{p}x*10#{p}x;
+  test-222: 10#{p}x *10#{p}x *10#{p}x;
+  test-223: 10#{p}x* 10#{p}x* 10#{p}x;
+  test-224: 10#{p}x * 10#{p}x * 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/error
new file mode 100644
index 0000000000..c807d4821b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25*#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/multiply/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/input.scss
new file mode 100644
index 0000000000..ba488563d3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25*.25;
+  test-2: .25 *.25;
+  test-3: .25* .25;
+  test-4: .25 * .25;
+  test-5: .25*-.25;
+  test-6: .25 *-.25;
+  test-7: .25* -.25;
+  test-8: .25 * -.25;
+  test-9: .25*#{.25};
+  test-10: .25 *#{.25};
+  test-11: .25* #{.25};
+  test-12: .25 * #{.25};
+  test-13: .25*#{-.25};
+  test-14: .25 *#{-.25};
+  test-15: .25* #{-.25};
+  test-16: .25 * #{-.25};
+  test-17: .25*#{.}25;
+  test-18: .25 *#{.}25;
+  test-19: .25* #{.}25;
+  test-20: .25 * #{.}25;
+  test-21: -.25*-.25;
+  test-22: -.25 *-.25;
+  test-23: -.25* -.25;
+  test-24: -.25 * -.25;
+  test-25: -.25*#{.25};
+  test-26: -.25 *#{.25};
+  test-27: -.25* #{.25};
+  test-28: -.25 * #{.25};
+  test-29: -.25*#{-.25};
+  test-30: -.25 *#{-.25};
+  test-31: -.25* #{-.25};
+  test-32: -.25 * #{-.25};
+  test-33: -.25*#{.}25;
+  test-34: -.25 *#{.}25;
+  test-35: -.25* #{.}25;
+  test-36: -.25 * #{.}25;
+  test-37: #{.25}*#{.25};
+  test-38: #{.25} *#{.25};
+  test-39: #{.25}* #{.25};
+  test-40: #{.25} * #{.25};
+  test-41: #{.25}*#{-.25};
+  test-42: #{.25} *#{-.25};
+  test-43: #{.25}* #{-.25};
+  test-44: #{.25} * #{-.25};
+  test-45: #{.25}*#{.}25;
+  test-46: #{.25} *#{.}25;
+  test-47: #{.25}* #{.}25;
+  test-48: #{.25} * #{.}25;
+  test-49: #{-.25}*#{-.25};
+  test-50: #{-.25} *#{-.25};
+  test-51: #{-.25}* #{-.25};
+  test-52: #{-.25} * #{-.25};
+  test-53: #{-.25}*#{.}25;
+  test-54: #{-.25} *#{.}25;
+  test-55: #{-.25}* #{.}25;
+  test-56: #{-.25} * #{.}25;
+  test-57: #{.}25*#{.}25;
+  test-58: #{.}25 *#{.}25;
+  test-59: #{.}25* #{.}25;
+  test-60: #{.}25 * #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..5698ea2cf3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25*.25*.25;
+  test-2: .25 *.25 *.25;
+  test-3: .25* .25* .25;
+  test-4: .25 * .25 * .25;
+  test-5: .25*.25*-.25;
+  test-6: .25 *.25 *-.25;
+  test-7: .25* .25* -.25;
+  test-8: .25 * .25 * -.25;
+  test-9: .25*.25*#{.25};
+  test-10: .25 *.25 *#{.25};
+  test-11: .25* .25* #{.25};
+  test-12: .25 * .25 * #{.25};
+  test-13: .25*.25*#{-.25};
+  test-14: .25 *.25 *#{-.25};
+  test-15: .25* .25* #{-.25};
+  test-16: .25 * .25 * #{-.25};
+  test-17: .25*.25*#{.}25;
+  test-18: .25 *.25 *#{.}25;
+  test-19: .25* .25* #{.}25;
+  test-20: .25 * .25 * #{.}25;
+  test-21: .25*-.25*-.25;
+  test-22: .25 *-.25 *-.25;
+  test-23: .25* -.25* -.25;
+  test-24: .25 * -.25 * -.25;
+  test-25: .25*-.25*#{.25};
+  test-26: .25 *-.25 *#{.25};
+  test-27: .25* -.25* #{.25};
+  test-28: .25 * -.25 * #{.25};
+  test-29: .25*-.25*#{-.25};
+  test-30: .25 *-.25 *#{-.25};
+  test-31: .25* -.25* #{-.25};
+  test-32: .25 * -.25 * #{-.25};
+  test-33: .25*-.25*#{.}25;
+  test-34: .25 *-.25 *#{.}25;
+  test-35: .25* -.25* #{.}25;
+  test-36: .25 * -.25 * #{.}25;
+  test-37: .25*#{.25}*#{.25};
+  test-38: .25 *#{.25} *#{.25};
+  test-39: .25* #{.25}* #{.25};
+  test-40: .25 * #{.25} * #{.25};
+  test-41: .25*#{.25}*#{-.25};
+  test-42: .25 *#{.25} *#{-.25};
+  test-43: .25* #{.25}* #{-.25};
+  test-44: .25 * #{.25} * #{-.25};
+  test-45: .25*#{.25}*#{.}25;
+  test-46: .25 *#{.25} *#{.}25;
+  test-47: .25* #{.25}* #{.}25;
+  test-48: .25 * #{.25} * #{.}25;
+  test-49: .25*#{-.25}*#{-.25};
+  test-50: .25 *#{-.25} *#{-.25};
+  test-51: .25* #{-.25}* #{-.25};
+  test-52: .25 * #{-.25} * #{-.25};
+  test-53: .25*#{-.25}*#{.}25;
+  test-54: .25 *#{-.25} *#{.}25;
+  test-55: .25* #{-.25}* #{.}25;
+  test-56: .25 * #{-.25} * #{.}25;
+  test-57: .25*#{.}25*#{.}25;
+  test-58: .25 *#{.}25 *#{.}25;
+  test-59: .25* #{.}25* #{.}25;
+  test-60: .25 * #{.}25 * #{.}25;
+  test-61: -.25*-.25*-.25;
+  test-62: -.25 *-.25 *-.25;
+  test-63: -.25* -.25* -.25;
+  test-64: -.25 * -.25 * -.25;
+  test-65: -.25*-.25*#{.25};
+  test-66: -.25 *-.25 *#{.25};
+  test-67: -.25* -.25* #{.25};
+  test-68: -.25 * -.25 * #{.25};
+  test-69: -.25*-.25*#{-.25};
+  test-70: -.25 *-.25 *#{-.25};
+  test-71: -.25* -.25* #{-.25};
+  test-72: -.25 * -.25 * #{-.25};
+  test-73: -.25*-.25*#{.}25;
+  test-74: -.25 *-.25 *#{.}25;
+  test-75: -.25* -.25* #{.}25;
+  test-76: -.25 * -.25 * #{.}25;
+  test-77: -.25*#{.25}*#{.25};
+  test-78: -.25 *#{.25} *#{.25};
+  test-79: -.25* #{.25}* #{.25};
+  test-80: -.25 * #{.25} * #{.25};
+  test-81: -.25*#{.25}*#{-.25};
+  test-82: -.25 *#{.25} *#{-.25};
+  test-83: -.25* #{.25}* #{-.25};
+  test-84: -.25 * #{.25} * #{-.25};
+  test-85: -.25*#{.25}*#{.}25;
+  test-86: -.25 *#{.25} *#{.}25;
+  test-87: -.25* #{.25}* #{.}25;
+  test-88: -.25 * #{.25} * #{.}25;
+  test-89: -.25*#{-.25}*#{-.25};
+  test-90: -.25 *#{-.25} *#{-.25};
+  test-91: -.25* #{-.25}* #{-.25};
+  test-92: -.25 * #{-.25} * #{-.25};
+  test-93: -.25*#{-.25}*#{.}25;
+  test-94: -.25 *#{-.25} *#{.}25;
+  test-95: -.25* #{-.25}* #{.}25;
+  test-96: -.25 * #{-.25} * #{.}25;
+  test-97: -.25*#{.}25*#{.}25;
+  test-98: -.25 *#{.}25 *#{.}25;
+  test-99: -.25* #{.}25* #{.}25;
+  test-100: -.25 * #{.}25 * #{.}25;
+  test-101: #{.25}*#{.25}*#{.25};
+  test-102: #{.25} *#{.25} *#{.25};
+  test-103: #{.25}* #{.25}* #{.25};
+  test-104: #{.25} * #{.25} * #{.25};
+  test-105: #{.25}*#{.25}*#{-.25};
+  test-106: #{.25} *#{.25} *#{-.25};
+  test-107: #{.25}* #{.25}* #{-.25};
+  test-108: #{.25} * #{.25} * #{-.25};
+  test-109: #{.25}*#{.25}*#{.}25;
+  test-110: #{.25} *#{.25} *#{.}25;
+  test-111: #{.25}* #{.25}* #{.}25;
+  test-112: #{.25} * #{.25} * #{.}25;
+  test-113: #{.25}*#{-.25}*#{-.25};
+  test-114: #{.25} *#{-.25} *#{-.25};
+  test-115: #{.25}* #{-.25}* #{-.25};
+  test-116: #{.25} * #{-.25} * #{-.25};
+  test-117: #{.25}*#{-.25}*#{.}25;
+  test-118: #{.25} *#{-.25} *#{.}25;
+  test-119: #{.25}* #{-.25}* #{.}25;
+  test-120: #{.25} * #{-.25} * #{.}25;
+  test-121: #{.25}*#{.}25*#{.}25;
+  test-122: #{.25} *#{.}25 *#{.}25;
+  test-123: #{.25}* #{.}25* #{.}25;
+  test-124: #{.25} * #{.}25 * #{.}25;
+  test-125: #{-.25}*#{-.25}*#{-.25};
+  test-126: #{-.25} *#{-.25} *#{-.25};
+  test-127: #{-.25}* #{-.25}* #{-.25};
+  test-128: #{-.25} * #{-.25} * #{-.25};
+  test-129: #{-.25}*#{-.25}*#{.}25;
+  test-130: #{-.25} *#{-.25} *#{.}25;
+  test-131: #{-.25}* #{-.25}* #{.}25;
+  test-132: #{-.25} * #{-.25} * #{.}25;
+  test-133: #{-.25}*#{.}25*#{.}25;
+  test-134: #{-.25} *#{.}25 *#{.}25;
+  test-135: #{-.25}* #{.}25* #{.}25;
+  test-136: #{-.25} * #{.}25 * #{.}25;
+  test-137: #{.}25*#{.}25*#{.}25;
+  test-138: #{.}25 *#{.}25 *#{.}25;
+  test-139: #{.}25* #{.}25* #{.}25;
+  test-140: #{.}25 * #{.}25 * #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/error
new file mode 100644
index 0000000000..5800314366
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: 100%*% isn't a valid CSS value.
+        on line 22 of /sass/sass-spec/spec/parser/operations/multiply/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/input.scss
new file mode 100644
index 0000000000..534d7353cf
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10*10;
+  test-2: 10 *10;
+  test-3: 10* 10;
+  test-4: 10 * 10;
+  test-5: 10*10%;
+  test-6: 10 *10%;
+  test-7: 10* 10%;
+  test-8: 10 * 10%;
+  test-9: 10*10px;
+  test-10: 10 *10px;
+  test-11: 10* 10px;
+  test-12: 10 * 10px;
+  test-13: 10*#AAA;
+  test-14: 10 *#AAA;
+  test-15: 10* #AAA;
+  test-16: 10 * #AAA;
+  test-17: 10*#{itpl};
+  test-18: 10 *#{itpl};
+  test-19: 10* #{itpl};
+  test-20: 10 * #{itpl};
+  test-21: 10%*10%;
+  test-22: 10% *10%;
+  test-23: 10%* 10%;
+  test-24: 10% * 10%;
+  test-25: 10%*10px;
+  test-26: 10% *10px;
+  test-27: 10%* 10px;
+  test-28: 10% * 10px;
+  test-29: 10%*#AAA;
+  test-30: 10% *#AAA;
+  test-31: 10%* #AAA;
+  test-32: 10% * #AAA;
+  test-33: 10%*#{itpl};
+  test-34: 10% *#{itpl};
+  test-35: 10%* #{itpl};
+  test-36: 10% * #{itpl};
+  test-37: 10px*10px;
+  test-38: 10px *10px;
+  test-39: 10px* 10px;
+  test-40: 10px * 10px;
+  test-41: 10px*#AAA;
+  test-42: 10px *#AAA;
+  test-43: 10px* #AAA;
+  test-44: 10px * #AAA;
+  test-45: 10px*#{itpl};
+  test-46: 10px *#{itpl};
+  test-47: 10px* #{itpl};
+  test-48: 10px * #{itpl};
+  test-49: #AAA*#AAA;
+  test-50: #AAA *#AAA;
+  test-51: #AAA* #AAA;
+  test-52: #AAA * #AAA;
+  test-53: #AAA*#{itpl};
+  test-54: #AAA *#{itpl};
+  test-55: #AAA* #{itpl};
+  test-56: #AAA * #{itpl};
+  test-57: #{itpl}*#{itpl};
+  test-58: #{itpl} *#{itpl};
+  test-59: #{itpl}* #{itpl};
+  test-60: #{itpl} * #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..91975cc814
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10*10*10;
+  test-2: 10 *10 *10;
+  test-3: 10* 10* 10;
+  test-4: 10 * 10 * 10;
+  test-5: 10*10*10%;
+  test-6: 10 *10 *10%;
+  test-7: 10* 10* 10%;
+  test-8: 10 * 10 * 10%;
+  test-9: 10*10*10px;
+  test-10: 10 *10 *10px;
+  test-11: 10* 10* 10px;
+  test-12: 10 * 10 * 10px;
+  test-13: 10*10*#AAA;
+  test-14: 10 *10 *#AAA;
+  test-15: 10* 10* #AAA;
+  test-16: 10 * 10 * #AAA;
+  test-17: 10*10*#{itpl};
+  test-18: 10 *10 *#{itpl};
+  test-19: 10* 10* #{itpl};
+  test-20: 10 * 10 * #{itpl};
+  test-21: 10*10%*10%;
+  test-22: 10 *10% *10%;
+  test-23: 10* 10%* 10%;
+  test-24: 10 * 10% * 10%;
+  test-25: 10*10%*10px;
+  test-26: 10 *10% *10px;
+  test-27: 10* 10%* 10px;
+  test-28: 10 * 10% * 10px;
+  test-29: 10*10%*#AAA;
+  test-30: 10 *10% *#AAA;
+  test-31: 10* 10%* #AAA;
+  test-32: 10 * 10% * #AAA;
+  test-33: 10*10%*#{itpl};
+  test-34: 10 *10% *#{itpl};
+  test-35: 10* 10%* #{itpl};
+  test-36: 10 * 10% * #{itpl};
+  test-37: 10*10px*10px;
+  test-38: 10 *10px *10px;
+  test-39: 10* 10px* 10px;
+  test-40: 10 * 10px * 10px;
+  test-41: 10*10px*#AAA;
+  test-42: 10 *10px *#AAA;
+  test-43: 10* 10px* #AAA;
+  test-44: 10 * 10px * #AAA;
+  test-45: 10*10px*#{itpl};
+  test-46: 10 *10px *#{itpl};
+  test-47: 10* 10px* #{itpl};
+  test-48: 10 * 10px * #{itpl};
+  test-49: 10*#AAA*#AAA;
+  test-50: 10 *#AAA *#AAA;
+  test-51: 10* #AAA* #AAA;
+  test-52: 10 * #AAA * #AAA;
+  test-53: 10*#AAA*#{itpl};
+  test-54: 10 *#AAA *#{itpl};
+  test-55: 10* #AAA* #{itpl};
+  test-56: 10 * #AAA * #{itpl};
+  test-57: 10*#{itpl}*#{itpl};
+  test-58: 10 *#{itpl} *#{itpl};
+  test-59: 10* #{itpl}* #{itpl};
+  test-60: 10 * #{itpl} * #{itpl};
+  test-61: 10%*10%*10%;
+  test-62: 10% *10% *10%;
+  test-63: 10%* 10%* 10%;
+  test-64: 10% * 10% * 10%;
+  test-65: 10%*10%*10px;
+  test-66: 10% *10% *10px;
+  test-67: 10%* 10%* 10px;
+  test-68: 10% * 10% * 10px;
+  test-69: 10%*10%*#AAA;
+  test-70: 10% *10% *#AAA;
+  test-71: 10%* 10%* #AAA;
+  test-72: 10% * 10% * #AAA;
+  test-73: 10%*10%*#{itpl};
+  test-74: 10% *10% *#{itpl};
+  test-75: 10%* 10%* #{itpl};
+  test-76: 10% * 10% * #{itpl};
+  test-77: 10%*10px*10px;
+  test-78: 10% *10px *10px;
+  test-79: 10%* 10px* 10px;
+  test-80: 10% * 10px * 10px;
+  test-81: 10%*10px*#AAA;
+  test-82: 10% *10px *#AAA;
+  test-83: 10%* 10px* #AAA;
+  test-84: 10% * 10px * #AAA;
+  test-85: 10%*10px*#{itpl};
+  test-86: 10% *10px *#{itpl};
+  test-87: 10%* 10px* #{itpl};
+  test-88: 10% * 10px * #{itpl};
+  test-89: 10%*#AAA*#AAA;
+  test-90: 10% *#AAA *#AAA;
+  test-91: 10%* #AAA* #AAA;
+  test-92: 10% * #AAA * #AAA;
+  test-93: 10%*#AAA*#{itpl};
+  test-94: 10% *#AAA *#{itpl};
+  test-95: 10%* #AAA* #{itpl};
+  test-96: 10% * #AAA * #{itpl};
+  test-97: 10%*#{itpl}*#{itpl};
+  test-98: 10% *#{itpl} *#{itpl};
+  test-99: 10%* #{itpl}* #{itpl};
+  test-100: 10% * #{itpl} * #{itpl};
+  test-101: 10px*10px*10px;
+  test-102: 10px *10px *10px;
+  test-103: 10px* 10px* 10px;
+  test-104: 10px * 10px * 10px;
+  test-105: 10px*10px*#AAA;
+  test-106: 10px *10px *#AAA;
+  test-107: 10px* 10px* #AAA;
+  test-108: 10px * 10px * #AAA;
+  test-109: 10px*10px*#{itpl};
+  test-110: 10px *10px *#{itpl};
+  test-111: 10px* 10px* #{itpl};
+  test-112: 10px * 10px * #{itpl};
+  test-113: 10px*#AAA*#AAA;
+  test-114: 10px *#AAA *#AAA;
+  test-115: 10px* #AAA* #AAA;
+  test-116: 10px * #AAA * #AAA;
+  test-117: 10px*#AAA*#{itpl};
+  test-118: 10px *#AAA *#{itpl};
+  test-119: 10px* #AAA* #{itpl};
+  test-120: 10px * #AAA * #{itpl};
+  test-121: 10px*#{itpl}*#{itpl};
+  test-122: 10px *#{itpl} *#{itpl};
+  test-123: 10px* #{itpl}* #{itpl};
+  test-124: 10px * #{itpl} * #{itpl};
+  test-125: #AAA*#AAA*#AAA;
+  test-126: #AAA *#AAA *#AAA;
+  test-127: #AAA* #AAA* #AAA;
+  test-128: #AAA * #AAA * #AAA;
+  test-129: #AAA*#AAA*#{itpl};
+  test-130: #AAA *#AAA *#{itpl};
+  test-131: #AAA* #AAA* #{itpl};
+  test-132: #AAA * #AAA * #{itpl};
+  test-133: #AAA*#{itpl}*#{itpl};
+  test-134: #AAA *#{itpl} *#{itpl};
+  test-135: #AAA* #{itpl}* #{itpl};
+  test-136: #AAA * #{itpl} * #{itpl};
+  test-137: #{itpl}*#{itpl}*#{itpl};
+  test-138: #{itpl} *#{itpl} *#{itpl};
+  test-139: #{itpl}* #{itpl}* #{itpl};
+  test-140: #{itpl} * #{itpl} * #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..bd84afbdc3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 100; test-2: 100; test-3: 100; test-4: 100; test-5: 10*10; test-6: 10 *10; test-7: 10* 10; test-8: 10 * 10; test-9: 100; test-10: 100; test-11: 100; test-12: 100; test-13: 10*10; test-14: 10 *10; test-15: 10* 10; test-16: 10 * 10; test-17: 10*10; test-18: 10 *10; test-19: 10* 10; test-20: 10 * 10; test-21: 10*10; test-22: 10 *10; test-23: 10* 10; test-24: 10 * 10; test-25: 10*10; test-26: 10 *10; test-27: 10* 10; test-28: 10 * 10; test-29: 10*10; test-30: 10 *10; test-31: 10* 10; test-32: 10 * 10; test-33: 10*10; test-34: 10 *10; test-35: 10* 10; test-36: 10 * 10; test-37: 10*10; test-38: 10 *10; test-39: 10* 10; test-40: 10 * 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..fa83e1bfb9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:100;test-2:100;test-3:100;test-4:100;test-5:10*10;test-6:10 *10;test-7:10* 10;test-8:10 * 10;test-9:100;test-10:100;test-11:100;test-12:100;test-13:10*10;test-14:10 *10;test-15:10* 10;test-16:10 * 10;test-17:10*10;test-18:10 *10;test-19:10* 10;test-20:10 * 10;test-21:10*10;test-22:10 *10;test-23:10* 10;test-24:10 * 10;test-25:10*10;test-26:10 *10;test-27:10* 10;test-28:10 * 10;test-29:10*10;test-30:10 *10;test-31:10* 10;test-32:10 * 10;test-33:10*10;test-34:10 *10;test-35:10* 10;test-36:10 * 10;test-37:10*10;test-38:10 *10;test-39:10* 10;test-40:10 * 10}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..6c965da300
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: 100;
+  test-2: 100;
+  test-3: 100;
+  test-4: 100;
+  test-5: 10*10;
+  test-6: 10 *10;
+  test-7: 10* 10;
+  test-8: 10 * 10;
+  test-9: 100;
+  test-10: 100;
+  test-11: 100;
+  test-12: 100;
+  test-13: 10*10;
+  test-14: 10 *10;
+  test-15: 10* 10;
+  test-16: 10 * 10;
+  test-17: 10*10;
+  test-18: 10 *10;
+  test-19: 10* 10;
+  test-20: 10 * 10;
+  test-21: 10*10;
+  test-22: 10 *10;
+  test-23: 10* 10;
+  test-24: 10 * 10;
+  test-25: 10*10;
+  test-26: 10 *10;
+  test-27: 10* 10;
+  test-28: 10 * 10;
+  test-29: 10*10;
+  test-30: 10 *10;
+  test-31: 10* 10;
+  test-32: 10 * 10;
+  test-33: 10*10;
+  test-34: 10 *10;
+  test-35: 10* 10;
+  test-36: 10 * 10;
+  test-37: 10*10;
+  test-38: 10 *10;
+  test-39: 10* 10;
+  test-40: 10 * 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..79821cfe32
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: 100;
+  test-2: 100;
+  test-3: 100;
+  test-4: 100;
+  test-5: 10*10;
+  test-6: 10 *10;
+  test-7: 10* 10;
+  test-8: 10 * 10;
+  test-9: 100;
+  test-10: 100;
+  test-11: 100;
+  test-12: 100;
+  test-13: 10*10;
+  test-14: 10 *10;
+  test-15: 10* 10;
+  test-16: 10 * 10;
+  test-17: 10*10;
+  test-18: 10 *10;
+  test-19: 10* 10;
+  test-20: 10 * 10;
+  test-21: 10*10;
+  test-22: 10 *10;
+  test-23: 10* 10;
+  test-24: 10 * 10;
+  test-25: 10*10;
+  test-26: 10 *10;
+  test-27: 10* 10;
+  test-28: 10 * 10;
+  test-29: 10*10;
+  test-30: 10 *10;
+  test-31: 10* 10;
+  test-32: 10 * 10;
+  test-33: 10*10;
+  test-34: 10 *10;
+  test-35: 10* 10;
+  test-36: 10 * 10;
+  test-37: 10*10;
+  test-38: 10 *10;
+  test-39: 10* 10;
+  test-40: 10 * 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/input.scss
new file mode 100644
index 0000000000..b7535fb79e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10*10;
+  test-2: 10 *10;
+  test-3: 10* 10;
+  test-4: 10 * 10;
+  test-5: 10*#{10};
+  test-6: 10 *#{10};
+  test-7: 10* #{10};
+  test-8: 10 * #{10};
+  test-9: 10*1#{0};
+  test-10: 10 *1#{0};
+  test-11: 10* 1#{0};
+  test-12: 10 * 1#{0};
+  test-13: 10*#{1}0;
+  test-14: 10 *#{1}0;
+  test-15: 10* #{1}0;
+  test-16: 10 * #{1}0;
+  test-17: #{10}*#{10};
+  test-18: #{10} *#{10};
+  test-19: #{10}* #{10};
+  test-20: #{10} * #{10};
+  test-21: #{10}*1#{0};
+  test-22: #{10} *1#{0};
+  test-23: #{10}* 1#{0};
+  test-24: #{10} * 1#{0};
+  test-25: #{10}*#{1}0;
+  test-26: #{10} *#{1}0;
+  test-27: #{10}* #{1}0;
+  test-28: #{10} * #{1}0;
+  test-29: 1#{0}*1#{0};
+  test-30: 1#{0} *1#{0};
+  test-31: 1#{0}* 1#{0};
+  test-32: 1#{0} * 1#{0};
+  test-33: 1#{0}*#{1}0;
+  test-34: 1#{0} *#{1}0;
+  test-35: 1#{0}* #{1}0;
+  test-36: 1#{0} * #{1}0;
+  test-37: #{1}0*#{1}0;
+  test-38: #{1}0 *#{1}0;
+  test-39: #{1}0* #{1}0;
+  test-40: #{1}0 * #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..2c586cfcb2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10*10*10;
+  test-2: 10 *10 *10;
+  test-3: 10* 10* 10;
+  test-4: 10 * 10 * 10;
+  test-5: 10*10*#{10};
+  test-6: 10 *10 *#{10};
+  test-7: 10* 10* #{10};
+  test-8: 10 * 10 * #{10};
+  test-9: 10*10*1#{0};
+  test-10: 10 *10 *1#{0};
+  test-11: 10* 10* 1#{0};
+  test-12: 10 * 10 * 1#{0};
+  test-13: 10*10*#{1}0;
+  test-14: 10 *10 *#{1}0;
+  test-15: 10* 10* #{1}0;
+  test-16: 10 * 10 * #{1}0;
+  test-17: 10*#{10}*#{10};
+  test-18: 10 *#{10} *#{10};
+  test-19: 10* #{10}* #{10};
+  test-20: 10 * #{10} * #{10};
+  test-21: 10*#{10}*1#{0};
+  test-22: 10 *#{10} *1#{0};
+  test-23: 10* #{10}* 1#{0};
+  test-24: 10 * #{10} * 1#{0};
+  test-25: 10*#{10}*#{1}0;
+  test-26: 10 *#{10} *#{1}0;
+  test-27: 10* #{10}* #{1}0;
+  test-28: 10 * #{10} * #{1}0;
+  test-29: 10*1#{0}*1#{0};
+  test-30: 10 *1#{0} *1#{0};
+  test-31: 10* 1#{0}* 1#{0};
+  test-32: 10 * 1#{0} * 1#{0};
+  test-33: 10*1#{0}*#{1}0;
+  test-34: 10 *1#{0} *#{1}0;
+  test-35: 10* 1#{0}* #{1}0;
+  test-36: 10 * 1#{0} * #{1}0;
+  test-37: 10*#{1}0*#{1}0;
+  test-38: 10 *#{1}0 *#{1}0;
+  test-39: 10* #{1}0* #{1}0;
+  test-40: 10 * #{1}0 * #{1}0;
+  test-41: #{10}*#{10}*#{10};
+  test-42: #{10} *#{10} *#{10};
+  test-43: #{10}* #{10}* #{10};
+  test-44: #{10} * #{10} * #{10};
+  test-45: #{10}*#{10}*1#{0};
+  test-46: #{10} *#{10} *1#{0};
+  test-47: #{10}* #{10}* 1#{0};
+  test-48: #{10} * #{10} * 1#{0};
+  test-49: #{10}*#{10}*#{1}0;
+  test-50: #{10} *#{10} *#{1}0;
+  test-51: #{10}* #{10}* #{1}0;
+  test-52: #{10} * #{10} * #{1}0;
+  test-53: #{10}*1#{0}*1#{0};
+  test-54: #{10} *1#{0} *1#{0};
+  test-55: #{10}* 1#{0}* 1#{0};
+  test-56: #{10} * 1#{0} * 1#{0};
+  test-57: #{10}*1#{0}*#{1}0;
+  test-58: #{10} *1#{0} *#{1}0;
+  test-59: #{10}* 1#{0}* #{1}0;
+  test-60: #{10} * 1#{0} * #{1}0;
+  test-61: #{10}*#{1}0*#{1}0;
+  test-62: #{10} *#{1}0 *#{1}0;
+  test-63: #{10}* #{1}0* #{1}0;
+  test-64: #{10} * #{1}0 * #{1}0;
+  test-65: 1#{0}*1#{0}*1#{0};
+  test-66: 1#{0} *1#{0} *1#{0};
+  test-67: 1#{0}* 1#{0}* 1#{0};
+  test-68: 1#{0} * 1#{0} * 1#{0};
+  test-69: 1#{0}*1#{0}*#{1}0;
+  test-70: 1#{0} *1#{0} *#{1}0;
+  test-71: 1#{0}* 1#{0}* #{1}0;
+  test-72: 1#{0} * 1#{0} * #{1}0;
+  test-73: 1#{0}*#{1}0*#{1}0;
+  test-74: 1#{0} *#{1}0 *#{1}0;
+  test-75: 1#{0}* #{1}0* #{1}0;
+  test-76: 1#{0} * #{1}0 * #{1}0;
+  test-77: #{1}0*#{1}0*#{1}0;
+  test-78: #{1}0 *#{1}0 *#{1}0;
+  test-79: #{1}0* #{1}0* #{1}0;
+  test-80: #{1}0 * #{1}0 * #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..c0da733057
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-37: interpolant*interpolant; test-38: interpolant *interpolant; test-39: interpolant* interpolant; test-40: interpolant * interpolant; test-41: interpolant*lschema_ritlp; test-42: interpolant *lschema_ritlp; test-43: interpolant* lschema_ritlp; test-44: interpolant * lschema_ritlp; test-45: interpolant*litlp_rschema; test-46: interpolant *litlp_rschema; test-47: interpolant* litlp_rschema; test-48: interpolant * litlp_rschema; test-49: lschema_ritlp*lschema_ritlp; test-50: lschema_ritlp *lschema_ritlp; test-51: lschema_ritlp* lschema_ritlp; test-52: lschema_ritlp * lschema_ritlp; test-53: lschema_ritlp*litlp_rschema; test-54: lschema_ritlp *litlp_rschema; test-55: lschema_ritlp* litlp_rschema; test-56: lschema_ritlp * litlp_rschema; test-57: litlp_rschema*litlp_rschema; test-58: litlp_rschema *litlp_rschema; test-59: litlp_rschema* litlp_rschema; test-60: litlp_rschema * litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..d0f3ce33e2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-37:interpolant*interpolant;test-38:interpolant *interpolant;test-39:interpolant* interpolant;test-40:interpolant * interpolant;test-41:interpolant*lschema_ritlp;test-42:interpolant *lschema_ritlp;test-43:interpolant* lschema_ritlp;test-44:interpolant * lschema_ritlp;test-45:interpolant*litlp_rschema;test-46:interpolant *litlp_rschema;test-47:interpolant* litlp_rschema;test-48:interpolant * litlp_rschema;test-49:lschema_ritlp*lschema_ritlp;test-50:lschema_ritlp *lschema_ritlp;test-51:lschema_ritlp* lschema_ritlp;test-52:lschema_ritlp * lschema_ritlp;test-53:lschema_ritlp*litlp_rschema;test-54:lschema_ritlp *litlp_rschema;test-55:lschema_ritlp* litlp_rschema;test-56:lschema_ritlp * litlp_rschema;test-57:litlp_rschema*litlp_rschema;test-58:litlp_rschema *litlp_rschema;test-59:litlp_rschema* litlp_rschema;test-60:litlp_rschema * litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..9612323bdd
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected.expanded.css
@@ -0,0 +1,26 @@
+foo {
+  test-37: interpolant*interpolant;
+  test-38: interpolant *interpolant;
+  test-39: interpolant* interpolant;
+  test-40: interpolant * interpolant;
+  test-41: interpolant*lschema_ritlp;
+  test-42: interpolant *lschema_ritlp;
+  test-43: interpolant* lschema_ritlp;
+  test-44: interpolant * lschema_ritlp;
+  test-45: interpolant*litlp_rschema;
+  test-46: interpolant *litlp_rschema;
+  test-47: interpolant* litlp_rschema;
+  test-48: interpolant * litlp_rschema;
+  test-49: lschema_ritlp*lschema_ritlp;
+  test-50: lschema_ritlp *lschema_ritlp;
+  test-51: lschema_ritlp* lschema_ritlp;
+  test-52: lschema_ritlp * lschema_ritlp;
+  test-53: lschema_ritlp*litlp_rschema;
+  test-54: lschema_ritlp *litlp_rschema;
+  test-55: lschema_ritlp* litlp_rschema;
+  test-56: lschema_ritlp * litlp_rschema;
+  test-57: litlp_rschema*litlp_rschema;
+  test-58: litlp_rschema *litlp_rschema;
+  test-59: litlp_rschema* litlp_rschema;
+  test-60: litlp_rschema * litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..1d02d420b6
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/expected_output.css
@@ -0,0 +1,25 @@
+foo {
+  test-37: interpolant*interpolant;
+  test-38: interpolant *interpolant;
+  test-39: interpolant* interpolant;
+  test-40: interpolant * interpolant;
+  test-41: interpolant*lschema_ritlp;
+  test-42: interpolant *lschema_ritlp;
+  test-43: interpolant* lschema_ritlp;
+  test-44: interpolant * lschema_ritlp;
+  test-45: interpolant*litlp_rschema;
+  test-46: interpolant *litlp_rschema;
+  test-47: interpolant* litlp_rschema;
+  test-48: interpolant * litlp_rschema;
+  test-49: lschema_ritlp*lschema_ritlp;
+  test-50: lschema_ritlp *lschema_ritlp;
+  test-51: lschema_ritlp* lschema_ritlp;
+  test-52: lschema_ritlp * lschema_ritlp;
+  test-53: lschema_ritlp*litlp_rschema;
+  test-54: lschema_ritlp *litlp_rschema;
+  test-55: lschema_ritlp* litlp_rschema;
+  test-56: lschema_ritlp * litlp_rschema;
+  test-57: litlp_rschema*litlp_rschema;
+  test-58: litlp_rschema *litlp_rschema;
+  test-59: litlp_rschema* litlp_rschema;
+  test-60: litlp_rschema * litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/input.scss
new file mode 100644
index 0000000000..eda9b17a16
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/pairs/input.scss
@@ -0,0 +1,26 @@
+foo {
+  test-37: #{interpolant}*#{interpolant};
+  test-38: #{interpolant} *#{interpolant};
+  test-39: #{interpolant}* #{interpolant};
+  test-40: #{interpolant} * #{interpolant};
+  test-41: #{interpolant}*lschema_#{ritlp};
+  test-42: #{interpolant} *lschema_#{ritlp};
+  test-43: #{interpolant}* lschema_#{ritlp};
+  test-44: #{interpolant} * lschema_#{ritlp};
+  test-45: #{interpolant}*#{litlp}_rschema;
+  test-46: #{interpolant} *#{litlp}_rschema;
+  test-47: #{interpolant}* #{litlp}_rschema;
+  test-48: #{interpolant} * #{litlp}_rschema;
+  test-49: lschema_#{ritlp}*lschema_#{ritlp};
+  test-50: lschema_#{ritlp} *lschema_#{ritlp};
+  test-51: lschema_#{ritlp}* lschema_#{ritlp};
+  test-52: lschema_#{ritlp} * lschema_#{ritlp};
+  test-53: lschema_#{ritlp}*#{litlp}_rschema;
+  test-54: lschema_#{ritlp} *#{litlp}_rschema;
+  test-55: lschema_#{ritlp}* #{litlp}_rschema;
+  test-56: lschema_#{ritlp} * #{litlp}_rschema;
+  test-57: #{litlp}_rschema*#{litlp}_rschema;
+  test-58: #{litlp}_rschema *#{litlp}_rschema;
+  test-59: #{litlp}_rschema* #{litlp}_rschema;
+  test-60: #{litlp}_rschema * #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/multiply/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/multiply/strings/tripplets/input.scss
new file mode 100644
index 0000000000..7e2b621ee1
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/multiply/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal*literal*literal;
+  test-2: literal *literal *literal;
+  test-3: literal* literal* literal;
+  test-4: literal * literal * literal;
+  test-5: literal*literal*"quoted";
+  test-6: literal *literal *"quoted";
+  test-7: literal* literal* "quoted";
+  test-8: literal * literal * "quoted";
+  test-9: literal*literal*#{interpolant};
+  test-10: literal *literal *#{interpolant};
+  test-11: literal* literal* #{interpolant};
+  test-12: literal * literal * #{interpolant};
+  test-13: literal*literal*lschema_#{ritlp};
+  test-14: literal *literal *lschema_#{ritlp};
+  test-15: literal* literal* lschema_#{ritlp};
+  test-16: literal * literal * lschema_#{ritlp};
+  test-17: literal*literal*#{litlp}_rschema;
+  test-18: literal *literal *#{litlp}_rschema;
+  test-19: literal* literal* #{litlp}_rschema;
+  test-20: literal * literal * #{litlp}_rschema;
+  test-21: literal*"quoted"*"quoted";
+  test-22: literal *"quoted" *"quoted";
+  test-23: literal* "quoted"* "quoted";
+  test-24: literal * "quoted" * "quoted";
+  test-25: literal*"quoted"*#{interpolant};
+  test-26: literal *"quoted" *#{interpolant};
+  test-27: literal* "quoted"* #{interpolant};
+  test-28: literal * "quoted" * #{interpolant};
+  test-29: literal*"quoted"*lschema_#{ritlp};
+  test-30: literal *"quoted" *lschema_#{ritlp};
+  test-31: literal* "quoted"* lschema_#{ritlp};
+  test-32: literal * "quoted" * lschema_#{ritlp};
+  test-33: literal*"quoted"*#{litlp}_rschema;
+  test-34: literal *"quoted" *#{litlp}_rschema;
+  test-35: literal* "quoted"* #{litlp}_rschema;
+  test-36: literal * "quoted" * #{litlp}_rschema;
+  test-37: literal*#{interpolant}*#{interpolant};
+  test-38: literal *#{interpolant} *#{interpolant};
+  test-39: literal* #{interpolant}* #{interpolant};
+  test-40: literal * #{interpolant} * #{interpolant};
+  test-41: literal*#{interpolant}*lschema_#{ritlp};
+  test-42: literal *#{interpolant} *lschema_#{ritlp};
+  test-43: literal* #{interpolant}* lschema_#{ritlp};
+  test-44: literal * #{interpolant} * lschema_#{ritlp};
+  test-45: literal*#{interpolant}*#{litlp}_rschema;
+  test-46: literal *#{interpolant} *#{litlp}_rschema;
+  test-47: literal* #{interpolant}* #{litlp}_rschema;
+  test-48: literal * #{interpolant} * #{litlp}_rschema;
+  test-49: literal*lschema_#{ritlp}*lschema_#{ritlp};
+  test-50: literal *lschema_#{ritlp} *lschema_#{ritlp};
+  test-51: literal* lschema_#{ritlp}* lschema_#{ritlp};
+  test-52: literal * lschema_#{ritlp} * lschema_#{ritlp};
+  test-53: literal*lschema_#{ritlp}*#{litlp}_rschema;
+  test-54: literal *lschema_#{ritlp} *#{litlp}_rschema;
+  test-55: literal* lschema_#{ritlp}* #{litlp}_rschema;
+  test-56: literal * lschema_#{ritlp} * #{litlp}_rschema;
+  test-57: literal*#{litlp}_rschema*#{litlp}_rschema;
+  test-58: literal *#{litlp}_rschema *#{litlp}_rschema;
+  test-59: literal* #{litlp}_rschema* #{litlp}_rschema;
+  test-60: literal * #{litlp}_rschema * #{litlp}_rschema;
+  test-61: "quoted"*"quoted"*"quoted";
+  test-62: "quoted" *"quoted" *"quoted";
+  test-63: "quoted"* "quoted"* "quoted";
+  test-64: "quoted" * "quoted" * "quoted";
+  test-65: "quoted"*"quoted"*#{interpolant};
+  test-66: "quoted" *"quoted" *#{interpolant};
+  test-67: "quoted"* "quoted"* #{interpolant};
+  test-68: "quoted" * "quoted" * #{interpolant};
+  test-69: "quoted"*"quoted"*lschema_#{ritlp};
+  test-70: "quoted" *"quoted" *lschema_#{ritlp};
+  test-71: "quoted"* "quoted"* lschema_#{ritlp};
+  test-72: "quoted" * "quoted" * lschema_#{ritlp};
+  test-73: "quoted"*"quoted"*#{litlp}_rschema;
+  test-74: "quoted" *"quoted" *#{litlp}_rschema;
+  test-75: "quoted"* "quoted"* #{litlp}_rschema;
+  test-76: "quoted" * "quoted" * #{litlp}_rschema;
+  test-77: "quoted"*#{interpolant}*#{interpolant};
+  test-78: "quoted" *#{interpolant} *#{interpolant};
+  test-79: "quoted"* #{interpolant}* #{interpolant};
+  test-80: "quoted" * #{interpolant} * #{interpolant};
+  test-81: "quoted"*#{interpolant}*lschema_#{ritlp};
+  test-82: "quoted" *#{interpolant} *lschema_#{ritlp};
+  test-83: "quoted"* #{interpolant}* lschema_#{ritlp};
+  test-84: "quoted" * #{interpolant} * lschema_#{ritlp};
+  test-85: "quoted"*#{interpolant}*#{litlp}_rschema;
+  test-86: "quoted" *#{interpolant} *#{litlp}_rschema;
+  test-87: "quoted"* #{interpolant}* #{litlp}_rschema;
+  test-88: "quoted" * #{interpolant} * #{litlp}_rschema;
+  test-89: "quoted"*lschema_#{ritlp}*lschema_#{ritlp};
+  test-90: "quoted" *lschema_#{ritlp} *lschema_#{ritlp};
+  test-91: "quoted"* lschema_#{ritlp}* lschema_#{ritlp};
+  test-92: "quoted" * lschema_#{ritlp} * lschema_#{ritlp};
+  test-93: "quoted"*lschema_#{ritlp}*#{litlp}_rschema;
+  test-94: "quoted" *lschema_#{ritlp} *#{litlp}_rschema;
+  test-95: "quoted"* lschema_#{ritlp}* #{litlp}_rschema;
+  test-96: "quoted" * lschema_#{ritlp} * #{litlp}_rschema;
+  test-97: "quoted"*#{litlp}_rschema*#{litlp}_rschema;
+  test-98: "quoted" *#{litlp}_rschema *#{litlp}_rschema;
+  test-99: "quoted"* #{litlp}_rschema* #{litlp}_rschema;
+  test-100: "quoted" * #{litlp}_rschema * #{litlp}_rschema;
+  test-101: #{interpolant}*#{interpolant}*#{interpolant};
+  test-102: #{interpolant} *#{interpolant} *#{interpolant};
+  test-103: #{interpolant}* #{interpolant}* #{interpolant};
+  test-104: #{interpolant} * #{interpolant} * #{interpolant};
+  test-105: #{interpolant}*#{interpolant}*lschema_#{ritlp};
+  test-106: #{interpolant} *#{interpolant} *lschema_#{ritlp};
+  test-107: #{interpolant}* #{interpolant}* lschema_#{ritlp};
+  test-108: #{interpolant} * #{interpolant} * lschema_#{ritlp};
+  test-109: #{interpolant}*#{interpolant}*#{litlp}_rschema;
+  test-110: #{interpolant} *#{interpolant} *#{litlp}_rschema;
+  test-111: #{interpolant}* #{interpolant}* #{litlp}_rschema;
+  test-112: #{interpolant} * #{interpolant} * #{litlp}_rschema;
+  test-113: #{interpolant}*lschema_#{ritlp}*lschema_#{ritlp};
+  test-114: #{interpolant} *lschema_#{ritlp} *lschema_#{ritlp};
+  test-115: #{interpolant}* lschema_#{ritlp}* lschema_#{ritlp};
+  test-116: #{interpolant} * lschema_#{ritlp} * lschema_#{ritlp};
+  test-117: #{interpolant}*lschema_#{ritlp}*#{litlp}_rschema;
+  test-118: #{interpolant} *lschema_#{ritlp} *#{litlp}_rschema;
+  test-119: #{interpolant}* lschema_#{ritlp}* #{litlp}_rschema;
+  test-120: #{interpolant} * lschema_#{ritlp} * #{litlp}_rschema;
+  test-121: #{interpolant}*#{litlp}_rschema*#{litlp}_rschema;
+  test-122: #{interpolant} *#{litlp}_rschema *#{litlp}_rschema;
+  test-123: #{interpolant}* #{litlp}_rschema* #{litlp}_rschema;
+  test-124: #{interpolant} * #{litlp}_rschema * #{litlp}_rschema;
+  test-125: lschema_#{ritlp}*lschema_#{ritlp}*lschema_#{ritlp};
+  test-126: lschema_#{ritlp} *lschema_#{ritlp} *lschema_#{ritlp};
+  test-127: lschema_#{ritlp}* lschema_#{ritlp}* lschema_#{ritlp};
+  test-128: lschema_#{ritlp} * lschema_#{ritlp} * lschema_#{ritlp};
+  test-129: lschema_#{ritlp}*lschema_#{ritlp}*#{litlp}_rschema;
+  test-130: lschema_#{ritlp} *lschema_#{ritlp} *#{litlp}_rschema;
+  test-131: lschema_#{ritlp}* lschema_#{ritlp}* #{litlp}_rschema;
+  test-132: lschema_#{ritlp} * lschema_#{ritlp} * #{litlp}_rschema;
+  test-133: lschema_#{ritlp}*#{litlp}_rschema*#{litlp}_rschema;
+  test-134: lschema_#{ritlp} *#{litlp}_rschema *#{litlp}_rschema;
+  test-135: lschema_#{ritlp}* #{litlp}_rschema* #{litlp}_rschema;
+  test-136: lschema_#{ritlp} * #{litlp}_rschema * #{litlp}_rschema;
+  test-137: #{litlp}_rschema*#{litlp}_rschema*#{litlp}_rschema;
+  test-138: #{litlp}_rschema *#{litlp}_rschema *#{litlp}_rschema;
+  test-139: #{litlp}_rschema* #{litlp}_rschema* #{litlp}_rschema;
+  test-140: #{litlp}_rschema * #{litlp}_rschema * #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/operations.pl b/spec/libsass-todo-tests/parser/operations/operations.pl
new file mode 100644
index 0000000000..0643b71e4e
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/operations.pl
@@ -0,0 +1,324 @@
+use strict;
+use warnings;
+
+use File::chdir;
+use File::Slurp qw(write_file);
+use Algorithm::Combinatorics qw(:all);
+
+# all operators ('+', '-', '*', '/', '%', '<', '==', ...)
+# operator spacing ('+', '+ ', ' +', ' + ')
+# interpolation on left, right, both and none
+# test two and more operations (precedence?)
+# mix number, strings, null and other types
+
+my %op = (
+	'modulo' => '%',
+	'addition' => '+',
+	'subtract' => '-',
+	'multiply' => '*',
+	'division' => '/',
+	'logic_gt' => '>',
+	'logic_lt' => '<',
+	'logic_ge' => '>=',
+	'logic_le' => '<=',
+	'logic_eq' => '==',
+	'logic_ne' => '!=',
+);
+my %types = (
+	'numbers' => [
+		'10',
+		#'-26',
+		#'+39',
+		'#{10}',
+		'1#{0}',
+		'#{1}0',
+	],
+	'fractions' => [
+		'.25',
+		'-.25',
+		#'+.325',
+		'#{.25}',
+		'#{-.25}',
+		'#{.}25',
+	],
+	'strings' => [
+		'literal',
+		'"quoted"',
+		'#{interpolant}',
+		'lschema_#{ritlp}',
+		'#{litlp}_rschema',
+	],
+	'dimensions' => [
+		'10',
+		# '-10',
+		'10px',
+		# '-10px',
+		'#{10}px',
+		'1#{0}px',
+		'10#{px}',
+		'10#{p}x',
+	],
+	'mixed' => [
+		'10',
+		#'-10',
+		'10%',
+		#'-10%',
+		'10px',
+		#'-10px',
+		'#AAA',
+		#'-#AAA',
+		'#{itpl}',
+		#'-#{itpl}',
+	],
+);
+my %variants = (
+	'pairs' => {
+		'combinations' => sub {
+			my ($o, $v, $t) = @_;
+			return combinations_with_repetition($t, 2);
+		},
+		'render' => sub {
+			my ($c, $o, $v, $f) = @_;
+			my $compare_op = ($o =~ m/^\s*[<>]=?\s*$/);
+			my $multiply_op = ($o =~ m/^\s*[\*%]\s*$/);
+			my $skip_literal = $compare_op || $multiply_op;
+			return '' if $skip_literal && $f->[0] eq '"quoted"';
+			return '' if $skip_literal && $f->[1] eq '"quoted"';
+			return '' if $skip_literal && $f->[0] eq 'literal';
+			return '' if $skip_literal && $f->[1] eq 'literal';
+			return "  test-$c: $f->[0]$o$f->[1];\n";
+		}
+	},
+	'tripplets' => {
+		'combinations' => sub {
+			my ($o, $v, $t) = @_;
+			return combinations_with_repetition($t, 3);
+		},
+		'render' => sub {
+			my ($c, $o, $v, $f) = @_;
+			# logic operations do not work with tripplets
+			# first pair would evaluate to a boolean
+			# boolean
+			return '' if ($o =~ m/^\s*[<>]=?\s*$/);
+			return "  test-$c: $f->[0]$o$f->[1]$o$f->[2];\n";
+		}
+	},
+);
+
+local $CWD = $CWD;
+
+sub create_variants
+{
+	my ($op, $type) = @_;
+	foreach my $variant (keys %variants)
+	{
+
+		# skip some combination which have some problems with deprecation warnings
+		next if ($op eq "multiply" && $type eq "dimensions" && $variant eq "pairs");
+
+		mkdir $variant;
+		local $CWD = $variant;
+		my $o = $op{$op};
+		my $a = $types{$type};
+		my $v = $variants{$variant};
+
+		# init combination iterator of this variant
+		my $combinator = $v->{'combinations'}->($o, $v, $a);
+
+		my $count = 0;
+		my $result = "foo {\n";
+
+		while (my $f = $combinator->next) {
+			$result .= $v->{'render'}->(++$count, "$o", $v, $f);
+			$result .= $v->{'render'}->(++$count, " $o", $v, $f);
+			$result .= $v->{'render'}->(++$count, "$o ", $v, $f);
+			$result .= $v->{'render'}->(++$count, " $o ", $v, $f);
+		}
+
+		print 'created ', join('/', $op, $type, $variant, 'input.scss'), "\n";
+		write_file('input.scss', { binmode => ':raw' }, $result. "}\n");
+
+	}
+}
+
+sub create_types
+{
+	my ($op) = @_;
+	foreach my $type (keys %types)
+	{
+		mkdir $type;
+		local $CWD = $type;
+		create_variants($op, $type);
+	}
+}
+
+sub create_ops
+{
+	foreach my $op (keys %op)
+	{
+		mkdir $op;
+		local $CWD = $op;
+		create_types($op);
+	}
+}
+
+create_ops();
+
+__DATA__
+
+
+#{10}px + 10px;
+10#{px} + 10px;
+
+#{10}px+10px;
+#{10}px+ 10px;
+#{10}px +10px;
+
+10#{px} + 10px;
+
+
+my @input = (
+	['01_literal', qq(literal)],
+	['02_double_quoted', qq("dquoted")],
+	['03_single_quoted', qq('squoted')],
+	['04_space_list_quoted', qq("alpha" 'beta')],
+	['05_comma_list_quoted', qq("alpha", 'beta')],
+	['06_space_list_complex', qq(gamme "'"delta"'")],
+	['07_comma_list_complex', qq(gamma, "'"delta"'")],
+	['10_escaped_backslash', qq(\\\\)],
+	['11_escaped_literal', qq(l\\\\ite\\ral)],
+	['12_escaped_double_quoted', qq("l\\\\ite\\ral")],
+	['13_escaped_single_quoted', qq('l\\\\ite\\ral')],
+
+	['14_escapes_literal_numbers', qq(\\1\\2\\3\\4\\5\\6\\7\\8\\9)],
+	['15_escapes_double_quoted_numbers', qq("\\1\\2\\3\\4\\5\\6\\7\\8\\9")],
+	['16_escapes_single_quoted_numbers', qq('\\1\\2\\3\\4\\5\\6\\7\\8\\9')],
+	['17_escapes_literal_lowercase', qq(\\b\\c\\d\\e\\f\\g\\h\\i\\j\\k\\l\\m\\n\\o\\p\\q\\r\\s\\t\\u\\v\\w\\x\\y\\z)],
+	['18_escapes_double_quoted_lowercase', qq("\\b\\c\\d\\e\\f\\g\\h\\i\\j\\k\\l\\m\\n\\o\\p\\q\\r\\s\\t\\u\\v\\w\\x\\y\\z")],
+	['19_escapes_single_quoted_lowercase', qq('\\b\\c\\d\\e\\f\\g\\h\\i\\j\\k\\l\\m\\n\\o\\p\\q\\r\\s\\t\\u\\v\\w\\x\\y\\z')],
+	['20_escapes_literal_uppercase', qq(\\B\\C\\D\\E\\F\\G\\H\\I\\J\\K\\L\\M\\N\\O\\P\\Q\\R\\S\\T\\U\\V\\W\\X\\Y\\Z)],
+	['21_escapes_double_quoted_uppercase', qq("\\B\\C\\D\\E\\F\\G\\H\\I\\J\\K\\L\\M\\N\\O\\P\\Q\\R\\S\\T\\U\\V\\W\\X\\Y\\Z")],
+	['22_escapes_single_quoted_uppercase', qq('\\B\\C\\D\\E\\F\\G\\H\\I\\J\\K\\L\\M\\N\\O\\P\\Q\\R\\S\\T\\U\\V\\W\\X\\Y\\Z')],
+
+	['23_escapes_literal_specials', qq(\\0_\\a_\\A)],
+	['24_escapes_double_quoted_specials', qq("\\0_\\a_\\A")],
+	['25_escapes_single_quoted_specials', qq('\\0_\\a_\\A')],
+
+	['26_escaped_literal_quotes', qq(\\\"\\\')],
+	['27_escaped_double_quotes', qq("\\\"")],
+	['28_escaped_single_quotes', qq('\\\'')],
+
+	['29_binary_operation', qq("foo#{'ba' + 'r'}baz")],
+	['30_base_test', qq("foo#{'ba' + 'r'}baz")],
+
+	['31_schema_simple', qq("["'foo'"]")],
+	['32_comma_list', qq("["',foo,   '"]")],
+	['33_space_list', qq("["'foo   '"]"    "bar")],
+	['34_mixed_list', qq("["',foo   ,   '"]"    "bar")],
+
+);
+
+my @template;
+
+push @template, "01_inline";
+push @template, << "EOF";
+.result {
+  output: %%;
+  output: #{%%};
+  output: "[#{%%}]";
+  output: "#{%%}";
+  output: '#{%%}';
+  output: "['#{%%}']";
+}
+EOF
+
+
+push @template, "02_variable";
+push @template, << "EOF";
+\$input: %%;
+.result {
+  output: \$input;
+  output: #{\$input};
+  output: "[#{\$input}]";
+  output: "#{\$input}";
+  output: '#{\$input}';
+  output: "['#{\$input}']";
+}
+EOF
+
+push @template, "03_inline_double";
+push @template, << "EOF";
+.result {
+  output: #{#{%%}};
+  output: #{"[#{%%}]"};
+  output: #{"#{%%}"};
+  output: #{'#{%%}'};
+  output: #{"['#{%%}']"};
+}
+EOF
+
+push @template, "04_variable_double";
+push @template, << "EOF";
+\$input: %%;
+.result {
+  output: #{#{\$input}};
+  output: #{"[#{\$input}]"};
+  output: #{"#{\$input}"};
+  output: #{'#{\$input}'};
+  output: #{"['#{\$input}']"};
+}
+EOF
+
+push @template, "05_variable_quoted_double";
+push @template, << "EOF";
+\$input: %%;
+.result {
+  dquoted: "#{#{\$input}}";
+  dquoted: "#{"[#{\$input}]"}";
+  dquoted: "#{"#{\$input}"}";
+  dquoted: "#{'#{\$input}'}";
+  dquoted: "#{"['#{\$input}']"}";
+  squoted: '#{#{\$input}}';
+  squoted: '#{"[#{\$input}]"}';
+  squoted: '#{"#{\$input}"}';
+  squoted: '#{'#{\$input}'}';
+  squoted: '#{"['#{\$input}']"}';
+}
+EOF
+# ruby sass cannot handle these cases ...
+# pop(@template); pop(@template);
+
+push @template, "06_escape_interpolation";
+push @template, << "EOF";
+\$input: %%;
+.result {
+  output: "[\\#{%%}]";
+  output: "\\#{%%}";
+  output: '\\#{%%}';
+  output: "['\\#{%%}']";
+}
+EOF
+
+
+sub render {
+	use File::Slurp qw(write_file);
+	my ($names, $template, $input) = @_;
+	$template =~ s/\%\%/$input/g;
+	local $CWD = $CWD;
+	foreach (@{$names}) {
+		mkdir $_;
+		$CWD = $_;
+	}
+	print "created ", join("/", @{$names}), "\n";
+	return write_file('input.scss', { binmode => ':raw' }, $template);
+
+}
+
+while (defined(my $name = shift @template)) {
+	my $template = shift(@template);
+	foreach my $input (@input) {
+		render([$input->[0], $name], $template, $input->[1]);
+	}
+}
+
+# <>;
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compact.css
new file mode 100644
index 0000000000..fd26dfd47c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 0; test-2: 10 -10; test-3: 0; test-4: 0; test-5: 0px; test-6: 10 -10px; test-7: 0px; test-8: 0px; test-9: 10-10px; test-10: 10 -10px; test-11: 10- 10px; test-12: 10 - 10px; test-13: 90px; test-14: 10 -10px; test-15: 90px; test-16: 90px; test-17: 0px; test-18: 10 -10px; test-19: 0px; test-20: 0px; test-21: 0px; test-22: 10 -10px; test-23: 0px; test-24: 0px; test-25: 0px; test-26: 10px -10px; test-27: 10px- 10px; test-28: 0px; test-29: 10px-10px; test-30: 10px -10px; test-31: 10px- 10px; test-32: 10px - 10px; test-33: 9px0px; test-34: 10px -10px; test-35: 10px- 10px; test-36: 9px0px; test-37: 0pxpx; test-38: 10px -10px; test-39: 10px- 10px; test-40: 0pxpx; test-41: 0pxpx; test-42: 10px -10px; test-43: 10px- 10px; test-44: 0pxpx; test-45: 10px-10px; test-46: 10px -10px; test-47: 10px- 10px; test-48: 10px - 10px; test-49: 10px-10px; test-50: 10px -10px; test-51: 10px- 10px; test-52: 10px-10px; test-53: 10px-10px; test-54: 10px -10px; test-55: 10px- 10px; test-56: 10px-10px; test-57: 10px-10px; test-58: 10px -10px; test-59: 10px- 10px; test-60: 10px-10px; test-61: 10px-10px; test-62: 10px -10px; test-63: 10px- 10px; test-64: 10px-10px; test-65: 10px-10px; test-66: 10px -10px; test-67: 10px- 10px; test-68: 10px-10px; test-69: 10px-10px; test-70: 10px -10px; test-71: 10px- 10px; test-72: 10px-10px; test-73: 10px-10px; test-74: 10px -10px; test-75: 10px- 10px; test-76: 10px - 10px; test-77: 10px-10px; test-78: 10px -10px; test-79: 10px- 10px; test-80: 10px - 10px; test-81: 10px-10px; test-82: 10px -10px; test-83: 10px- 10px; test-84: 10px-10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compressed.css
new file mode 100644
index 0000000000..0d3344cfb3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:0;test-2:10 -10;test-3:0;test-4:0;test-5:0px;test-6:10 -10px;test-7:0px;test-8:0px;test-9:10-10px;test-10:10 -10px;test-11:10- 10px;test-12:10 - 10px;test-13:90px;test-14:10 -10px;test-15:90px;test-16:90px;test-17:0px;test-18:10 -10px;test-19:0px;test-20:0px;test-21:0px;test-22:10 -10px;test-23:0px;test-24:0px;test-25:0px;test-26:10px -10px;test-27:10px- 10px;test-28:0px;test-29:10px-10px;test-30:10px -10px;test-31:10px- 10px;test-32:10px - 10px;test-33:9px0px;test-34:10px -10px;test-35:10px- 10px;test-36:9px0px;test-37:0pxpx;test-38:10px -10px;test-39:10px- 10px;test-40:0pxpx;test-41:0pxpx;test-42:10px -10px;test-43:10px- 10px;test-44:0pxpx;test-45:10px-10px;test-46:10px -10px;test-47:10px- 10px;test-48:10px - 10px;test-49:10px-10px;test-50:10px -10px;test-51:10px- 10px;test-52:10px-10px;test-53:10px-10px;test-54:10px -10px;test-55:10px- 10px;test-56:10px-10px;test-57:10px-10px;test-58:10px -10px;test-59:10px- 10px;test-60:10px-10px;test-61:10px-10px;test-62:10px -10px;test-63:10px- 10px;test-64:10px-10px;test-65:10px-10px;test-66:10px -10px;test-67:10px- 10px;test-68:10px-10px;test-69:10px-10px;test-70:10px -10px;test-71:10px- 10px;test-72:10px-10px;test-73:10px-10px;test-74:10px -10px;test-75:10px- 10px;test-76:10px - 10px;test-77:10px-10px;test-78:10px -10px;test-79:10px- 10px;test-80:10px - 10px;test-81:10px-10px;test-82:10px -10px;test-83:10px- 10px;test-84:10px-10px}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.expanded.css
new file mode 100644
index 0000000000..8798f14501
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected.expanded.css
@@ -0,0 +1,86 @@
+foo {
+  test-1: 0;
+  test-2: 10 -10;
+  test-3: 0;
+  test-4: 0;
+  test-5: 0px;
+  test-6: 10 -10px;
+  test-7: 0px;
+  test-8: 0px;
+  test-9: 10-10px;
+  test-10: 10 -10px;
+  test-11: 10- 10px;
+  test-12: 10 - 10px;
+  test-13: 90px;
+  test-14: 10 -10px;
+  test-15: 90px;
+  test-16: 90px;
+  test-17: 0px;
+  test-18: 10 -10px;
+  test-19: 0px;
+  test-20: 0px;
+  test-21: 0px;
+  test-22: 10 -10px;
+  test-23: 0px;
+  test-24: 0px;
+  test-25: 0px;
+  test-26: 10px -10px;
+  test-27: 10px- 10px;
+  test-28: 0px;
+  test-29: 10px-10px;
+  test-30: 10px -10px;
+  test-31: 10px- 10px;
+  test-32: 10px - 10px;
+  test-33: 9px0px;
+  test-34: 10px -10px;
+  test-35: 10px- 10px;
+  test-36: 9px0px;
+  test-37: 0pxpx;
+  test-38: 10px -10px;
+  test-39: 10px- 10px;
+  test-40: 0pxpx;
+  test-41: 0pxpx;
+  test-42: 10px -10px;
+  test-43: 10px- 10px;
+  test-44: 0pxpx;
+  test-45: 10px-10px;
+  test-46: 10px -10px;
+  test-47: 10px- 10px;
+  test-48: 10px - 10px;
+  test-49: 10px-10px;
+  test-50: 10px -10px;
+  test-51: 10px- 10px;
+  test-52: 10px-10px;
+  test-53: 10px-10px;
+  test-54: 10px -10px;
+  test-55: 10px- 10px;
+  test-56: 10px-10px;
+  test-57: 10px-10px;
+  test-58: 10px -10px;
+  test-59: 10px- 10px;
+  test-60: 10px-10px;
+  test-61: 10px-10px;
+  test-62: 10px -10px;
+  test-63: 10px- 10px;
+  test-64: 10px-10px;
+  test-65: 10px-10px;
+  test-66: 10px -10px;
+  test-67: 10px- 10px;
+  test-68: 10px-10px;
+  test-69: 10px-10px;
+  test-70: 10px -10px;
+  test-71: 10px- 10px;
+  test-72: 10px-10px;
+  test-73: 10px-10px;
+  test-74: 10px -10px;
+  test-75: 10px- 10px;
+  test-76: 10px - 10px;
+  test-77: 10px-10px;
+  test-78: 10px -10px;
+  test-79: 10px- 10px;
+  test-80: 10px - 10px;
+  test-81: 10px-10px;
+  test-82: 10px -10px;
+  test-83: 10px- 10px;
+  test-84: 10px-10px;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected_output.css
new file mode 100644
index 0000000000..b71defa966
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/expected_output.css
@@ -0,0 +1,85 @@
+foo {
+  test-1: 0;
+  test-2: 10 -10;
+  test-3: 0;
+  test-4: 0;
+  test-5: 0px;
+  test-6: 10 -10px;
+  test-7: 0px;
+  test-8: 0px;
+  test-9: 10-10px;
+  test-10: 10 -10px;
+  test-11: 10- 10px;
+  test-12: 10 - 10px;
+  test-13: 90px;
+  test-14: 10 -10px;
+  test-15: 90px;
+  test-16: 90px;
+  test-17: 0px;
+  test-18: 10 -10px;
+  test-19: 0px;
+  test-20: 0px;
+  test-21: 0px;
+  test-22: 10 -10px;
+  test-23: 0px;
+  test-24: 0px;
+  test-25: 0px;
+  test-26: 10px -10px;
+  test-27: 10px- 10px;
+  test-28: 0px;
+  test-29: 10px-10px;
+  test-30: 10px -10px;
+  test-31: 10px- 10px;
+  test-32: 10px - 10px;
+  test-33: 9px0px;
+  test-34: 10px -10px;
+  test-35: 10px- 10px;
+  test-36: 9px0px;
+  test-37: 0pxpx;
+  test-38: 10px -10px;
+  test-39: 10px- 10px;
+  test-40: 0pxpx;
+  test-41: 0pxpx;
+  test-42: 10px -10px;
+  test-43: 10px- 10px;
+  test-44: 0pxpx;
+  test-45: 10px-10px;
+  test-46: 10px -10px;
+  test-47: 10px- 10px;
+  test-48: 10px - 10px;
+  test-49: 10px-10px;
+  test-50: 10px -10px;
+  test-51: 10px- 10px;
+  test-52: 10px-10px;
+  test-53: 10px-10px;
+  test-54: 10px -10px;
+  test-55: 10px- 10px;
+  test-56: 10px-10px;
+  test-57: 10px-10px;
+  test-58: 10px -10px;
+  test-59: 10px- 10px;
+  test-60: 10px-10px;
+  test-61: 10px-10px;
+  test-62: 10px -10px;
+  test-63: 10px- 10px;
+  test-64: 10px-10px;
+  test-65: 10px-10px;
+  test-66: 10px -10px;
+  test-67: 10px- 10px;
+  test-68: 10px-10px;
+  test-69: 10px-10px;
+  test-70: 10px -10px;
+  test-71: 10px- 10px;
+  test-72: 10px-10px;
+  test-73: 10px-10px;
+  test-74: 10px -10px;
+  test-75: 10px- 10px;
+  test-76: 10px - 10px;
+  test-77: 10px-10px;
+  test-78: 10px -10px;
+  test-79: 10px- 10px;
+  test-80: 10px - 10px;
+  test-81: 10px-10px;
+  test-82: 10px -10px;
+  test-83: 10px- 10px;
+  test-84: 10px-10px; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/input.scss
new file mode 100644
index 0000000000..88645bcf40
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/pairs/input.scss
@@ -0,0 +1,86 @@
+foo {
+  test-1: 10-10;
+  test-2: 10 -10;
+  test-3: 10- 10;
+  test-4: 10 - 10;
+  test-5: 10-10px;
+  test-6: 10 -10px;
+  test-7: 10- 10px;
+  test-8: 10 - 10px;
+  test-9: 10-#{10}px;
+  test-10: 10 -#{10}px;
+  test-11: 10- #{10}px;
+  test-12: 10 - #{10}px;
+  test-13: 10-1#{0}px;
+  test-14: 10 -1#{0}px;
+  test-15: 10- 1#{0}px;
+  test-16: 10 - 1#{0}px;
+  test-17: 10-10#{px};
+  test-18: 10 -10#{px};
+  test-19: 10- 10#{px};
+  test-20: 10 - 10#{px};
+  test-21: 10-10#{p}x;
+  test-22: 10 -10#{p}x;
+  test-23: 10- 10#{p}x;
+  test-24: 10 - 10#{p}x;
+  test-25: 10px-10px;
+  test-26: 10px -10px;
+  test-27: 10px- 10px;
+  test-28: 10px - 10px;
+  test-29: 10px-#{10}px;
+  test-30: 10px -#{10}px;
+  test-31: 10px- #{10}px;
+  test-32: 10px - #{10}px;
+  test-33: 10px-1#{0}px;
+  test-34: 10px -1#{0}px;
+  test-35: 10px- 1#{0}px;
+  test-36: 10px - 1#{0}px;
+  test-37: 10px-10#{px};
+  test-38: 10px -10#{px};
+  test-39: 10px- 10#{px};
+  test-40: 10px - 10#{px};
+  test-41: 10px-10#{p}x;
+  test-42: 10px -10#{p}x;
+  test-43: 10px- 10#{p}x;
+  test-44: 10px - 10#{p}x;
+  test-45: #{10}px-#{10}px;
+  test-46: #{10}px -#{10}px;
+  test-47: #{10}px- #{10}px;
+  test-48: #{10}px - #{10}px;
+  test-49: #{10}px-1#{0}px;
+  test-50: #{10}px -1#{0}px;
+  test-51: #{10}px- 1#{0}px;
+  test-52: #{10}px - 1#{0}px;
+  test-53: #{10}px-10#{px};
+  test-54: #{10}px -10#{px};
+  test-55: #{10}px- 10#{px};
+  test-56: #{10}px - 10#{px};
+  test-57: #{10}px-10#{p}x;
+  test-58: #{10}px -10#{p}x;
+  test-59: #{10}px- 10#{p}x;
+  test-60: #{10}px - 10#{p}x;
+  test-61: 1#{0}px-1#{0}px;
+  test-62: 1#{0}px -1#{0}px;
+  test-63: 1#{0}px- 1#{0}px;
+  test-64: 1#{0}px - 1#{0}px;
+  test-65: 1#{0}px-10#{px};
+  test-66: 1#{0}px -10#{px};
+  test-67: 1#{0}px- 10#{px};
+  test-68: 1#{0}px - 10#{px};
+  test-69: 1#{0}px-10#{p}x;
+  test-70: 1#{0}px -10#{p}x;
+  test-71: 1#{0}px- 10#{p}x;
+  test-72: 1#{0}px - 10#{p}x;
+  test-73: 10#{px}-10#{px};
+  test-74: 10#{px} -10#{px};
+  test-75: 10#{px}- 10#{px};
+  test-76: 10#{px} - 10#{px};
+  test-77: 10#{px}-10#{p}x;
+  test-78: 10#{px} -10#{p}x;
+  test-79: 10#{px}- 10#{p}x;
+  test-80: 10#{px} - 10#{p}x;
+  test-81: 10#{p}x-10#{p}x;
+  test-82: 10#{p}x -10#{p}x;
+  test-83: 10#{p}x- 10#{p}x;
+  test-84: 10#{p}x - 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/dimensions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/tripplets/input.scss
new file mode 100644
index 0000000000..bc7e3b55da
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/dimensions/tripplets/input.scss
@@ -0,0 +1,226 @@
+foo {
+  test-1: 10-10-10;
+  test-2: 10 -10 -10;
+  test-3: 10- 10- 10;
+  test-4: 10 - 10 - 10;
+  test-5: 10-10-10px;
+  test-6: 10 -10 -10px;
+  test-7: 10- 10- 10px;
+  test-8: 10 - 10 - 10px;
+  test-9: 10-10-#{10}px;
+  test-10: 10 -10 -#{10}px;
+  test-11: 10- 10- #{10}px;
+  test-12: 10 - 10 - #{10}px;
+  test-13: 10-10-1#{0}px;
+  test-14: 10 -10 -1#{0}px;
+  test-15: 10- 10- 1#{0}px;
+  test-16: 10 - 10 - 1#{0}px;
+  test-17: 10-10-10#{px};
+  test-18: 10 -10 -10#{px};
+  test-19: 10- 10- 10#{px};
+  test-20: 10 - 10 - 10#{px};
+  test-21: 10-10-10#{p}x;
+  test-22: 10 -10 -10#{p}x;
+  test-23: 10- 10- 10#{p}x;
+  test-24: 10 - 10 - 10#{p}x;
+  test-25: 10-10px-10px;
+  test-26: 10 -10px -10px;
+  test-27: 10- 10px- 10px;
+  test-28: 10 - 10px - 10px;
+  test-29: 10-10px-#{10}px;
+  test-30: 10 -10px -#{10}px;
+  test-31: 10- 10px- #{10}px;
+  test-32: 10 - 10px - #{10}px;
+  test-33: 10-10px-1#{0}px;
+  test-34: 10 -10px -1#{0}px;
+  test-35: 10- 10px- 1#{0}px;
+  test-36: 10 - 10px - 1#{0}px;
+  test-37: 10-10px-10#{px};
+  test-38: 10 -10px -10#{px};
+  test-39: 10- 10px- 10#{px};
+  test-40: 10 - 10px - 10#{px};
+  test-41: 10-10px-10#{p}x;
+  test-42: 10 -10px -10#{p}x;
+  test-43: 10- 10px- 10#{p}x;
+  test-44: 10 - 10px - 10#{p}x;
+  test-45: 10-#{10}px-#{10}px;
+  test-46: 10 -#{10}px -#{10}px;
+  test-47: 10- #{10}px- #{10}px;
+  test-48: 10 - #{10}px - #{10}px;
+  test-49: 10-#{10}px-1#{0}px;
+  test-50: 10 -#{10}px -1#{0}px;
+  test-51: 10- #{10}px- 1#{0}px;
+  test-52: 10 - #{10}px - 1#{0}px;
+  test-53: 10-#{10}px-10#{px};
+  test-54: 10 -#{10}px -10#{px};
+  test-55: 10- #{10}px- 10#{px};
+  test-56: 10 - #{10}px - 10#{px};
+  test-57: 10-#{10}px-10#{p}x;
+  test-58: 10 -#{10}px -10#{p}x;
+  test-59: 10- #{10}px- 10#{p}x;
+  test-60: 10 - #{10}px - 10#{p}x;
+  test-61: 10-1#{0}px-1#{0}px;
+  test-62: 10 -1#{0}px -1#{0}px;
+  test-63: 10- 1#{0}px- 1#{0}px;
+  test-64: 10 - 1#{0}px - 1#{0}px;
+  test-65: 10-1#{0}px-10#{px};
+  test-66: 10 -1#{0}px -10#{px};
+  test-67: 10- 1#{0}px- 10#{px};
+  test-68: 10 - 1#{0}px - 10#{px};
+  test-69: 10-1#{0}px-10#{p}x;
+  test-70: 10 -1#{0}px -10#{p}x;
+  test-71: 10- 1#{0}px- 10#{p}x;
+  test-72: 10 - 1#{0}px - 10#{p}x;
+  test-73: 10-10#{px}-10#{px};
+  test-74: 10 -10#{px} -10#{px};
+  test-75: 10- 10#{px}- 10#{px};
+  test-76: 10 - 10#{px} - 10#{px};
+  test-77: 10-10#{px}-10#{p}x;
+  test-78: 10 -10#{px} -10#{p}x;
+  test-79: 10- 10#{px}- 10#{p}x;
+  test-80: 10 - 10#{px} - 10#{p}x;
+  test-81: 10-10#{p}x-10#{p}x;
+  test-82: 10 -10#{p}x -10#{p}x;
+  test-83: 10- 10#{p}x- 10#{p}x;
+  test-84: 10 - 10#{p}x - 10#{p}x;
+  test-85: 10px-10px-10px;
+  test-86: 10px -10px -10px;
+  test-87: 10px- 10px- 10px;
+  test-88: 10px - 10px - 10px;
+  test-89: 10px-10px-#{10}px;
+  test-90: 10px -10px -#{10}px;
+  test-91: 10px- 10px- #{10}px;
+  test-92: 10px - 10px - #{10}px;
+  test-93: 10px-10px-1#{0}px;
+  test-94: 10px -10px -1#{0}px;
+  test-95: 10px- 10px- 1#{0}px;
+  test-96: 10px - 10px - 1#{0}px;
+  test-97: 10px-10px-10#{px};
+  test-98: 10px -10px -10#{px};
+  test-99: 10px- 10px- 10#{px};
+  test-100: 10px - 10px - 10#{px};
+  test-101: 10px-10px-10#{p}x;
+  test-102: 10px -10px -10#{p}x;
+  test-103: 10px- 10px- 10#{p}x;
+  test-104: 10px - 10px - 10#{p}x;
+  test-105: 10px-#{10}px-#{10}px;
+  test-106: 10px -#{10}px -#{10}px;
+  test-107: 10px- #{10}px- #{10}px;
+  test-108: 10px - #{10}px - #{10}px;
+  test-109: 10px-#{10}px-1#{0}px;
+  test-110: 10px -#{10}px -1#{0}px;
+  test-111: 10px- #{10}px- 1#{0}px;
+  test-112: 10px - #{10}px - 1#{0}px;
+  test-113: 10px-#{10}px-10#{px};
+  test-114: 10px -#{10}px -10#{px};
+  test-115: 10px- #{10}px- 10#{px};
+  test-116: 10px - #{10}px - 10#{px};
+  test-117: 10px-#{10}px-10#{p}x;
+  test-118: 10px -#{10}px -10#{p}x;
+  test-119: 10px- #{10}px- 10#{p}x;
+  test-120: 10px - #{10}px - 10#{p}x;
+  test-121: 10px-1#{0}px-1#{0}px;
+  test-122: 10px -1#{0}px -1#{0}px;
+  test-123: 10px- 1#{0}px- 1#{0}px;
+  test-124: 10px - 1#{0}px - 1#{0}px;
+  test-125: 10px-1#{0}px-10#{px};
+  test-126: 10px -1#{0}px -10#{px};
+  test-127: 10px- 1#{0}px- 10#{px};
+  test-128: 10px - 1#{0}px - 10#{px};
+  test-129: 10px-1#{0}px-10#{p}x;
+  test-130: 10px -1#{0}px -10#{p}x;
+  test-131: 10px- 1#{0}px- 10#{p}x;
+  test-132: 10px - 1#{0}px - 10#{p}x;
+  test-133: 10px-10#{px}-10#{px};
+  test-134: 10px -10#{px} -10#{px};
+  test-135: 10px- 10#{px}- 10#{px};
+  test-136: 10px - 10#{px} - 10#{px};
+  test-137: 10px-10#{px}-10#{p}x;
+  test-138: 10px -10#{px} -10#{p}x;
+  test-139: 10px- 10#{px}- 10#{p}x;
+  test-140: 10px - 10#{px} - 10#{p}x;
+  test-141: 10px-10#{p}x-10#{p}x;
+  test-142: 10px -10#{p}x -10#{p}x;
+  test-143: 10px- 10#{p}x- 10#{p}x;
+  test-144: 10px - 10#{p}x - 10#{p}x;
+  test-145: #{10}px-#{10}px-#{10}px;
+  test-146: #{10}px -#{10}px -#{10}px;
+  test-147: #{10}px- #{10}px- #{10}px;
+  test-148: #{10}px - #{10}px - #{10}px;
+  test-149: #{10}px-#{10}px-1#{0}px;
+  test-150: #{10}px -#{10}px -1#{0}px;
+  test-151: #{10}px- #{10}px- 1#{0}px;
+  test-152: #{10}px - #{10}px - 1#{0}px;
+  test-153: #{10}px-#{10}px-10#{px};
+  test-154: #{10}px -#{10}px -10#{px};
+  test-155: #{10}px- #{10}px- 10#{px};
+  test-156: #{10}px - #{10}px - 10#{px};
+  test-157: #{10}px-#{10}px-10#{p}x;
+  test-158: #{10}px -#{10}px -10#{p}x;
+  test-159: #{10}px- #{10}px- 10#{p}x;
+  test-160: #{10}px - #{10}px - 10#{p}x;
+  test-161: #{10}px-1#{0}px-1#{0}px;
+  test-162: #{10}px -1#{0}px -1#{0}px;
+  test-163: #{10}px- 1#{0}px- 1#{0}px;
+  test-164: #{10}px - 1#{0}px - 1#{0}px;
+  test-165: #{10}px-1#{0}px-10#{px};
+  test-166: #{10}px -1#{0}px -10#{px};
+  test-167: #{10}px- 1#{0}px- 10#{px};
+  test-168: #{10}px - 1#{0}px - 10#{px};
+  test-169: #{10}px-1#{0}px-10#{p}x;
+  test-170: #{10}px -1#{0}px -10#{p}x;
+  test-171: #{10}px- 1#{0}px- 10#{p}x;
+  test-172: #{10}px - 1#{0}px - 10#{p}x;
+  test-173: #{10}px-10#{px}-10#{px};
+  test-174: #{10}px -10#{px} -10#{px};
+  test-175: #{10}px- 10#{px}- 10#{px};
+  test-176: #{10}px - 10#{px} - 10#{px};
+  test-177: #{10}px-10#{px}-10#{p}x;
+  test-178: #{10}px -10#{px} -10#{p}x;
+  test-179: #{10}px- 10#{px}- 10#{p}x;
+  test-180: #{10}px - 10#{px} - 10#{p}x;
+  test-181: #{10}px-10#{p}x-10#{p}x;
+  test-182: #{10}px -10#{p}x -10#{p}x;
+  test-183: #{10}px- 10#{p}x- 10#{p}x;
+  test-184: #{10}px - 10#{p}x - 10#{p}x;
+  test-185: 1#{0}px-1#{0}px-1#{0}px;
+  test-186: 1#{0}px -1#{0}px -1#{0}px;
+  test-187: 1#{0}px- 1#{0}px- 1#{0}px;
+  test-188: 1#{0}px - 1#{0}px - 1#{0}px;
+  test-189: 1#{0}px-1#{0}px-10#{px};
+  test-190: 1#{0}px -1#{0}px -10#{px};
+  test-191: 1#{0}px- 1#{0}px- 10#{px};
+  test-192: 1#{0}px - 1#{0}px - 10#{px};
+  test-193: 1#{0}px-1#{0}px-10#{p}x;
+  test-194: 1#{0}px -1#{0}px -10#{p}x;
+  test-195: 1#{0}px- 1#{0}px- 10#{p}x;
+  test-196: 1#{0}px - 1#{0}px - 10#{p}x;
+  test-197: 1#{0}px-10#{px}-10#{px};
+  test-198: 1#{0}px -10#{px} -10#{px};
+  test-199: 1#{0}px- 10#{px}- 10#{px};
+  test-200: 1#{0}px - 10#{px} - 10#{px};
+  test-201: 1#{0}px-10#{px}-10#{p}x;
+  test-202: 1#{0}px -10#{px} -10#{p}x;
+  test-203: 1#{0}px- 10#{px}- 10#{p}x;
+  test-204: 1#{0}px - 10#{px} - 10#{p}x;
+  test-205: 1#{0}px-10#{p}x-10#{p}x;
+  test-206: 1#{0}px -10#{p}x -10#{p}x;
+  test-207: 1#{0}px- 10#{p}x- 10#{p}x;
+  test-208: 1#{0}px - 10#{p}x - 10#{p}x;
+  test-209: 10#{px}-10#{px}-10#{px};
+  test-210: 10#{px} -10#{px} -10#{px};
+  test-211: 10#{px}- 10#{px}- 10#{px};
+  test-212: 10#{px} - 10#{px} - 10#{px};
+  test-213: 10#{px}-10#{px}-10#{p}x;
+  test-214: 10#{px} -10#{px} -10#{p}x;
+  test-215: 10#{px}- 10#{px}- 10#{p}x;
+  test-216: 10#{px} - 10#{px} - 10#{p}x;
+  test-217: 10#{px}-10#{p}x-10#{p}x;
+  test-218: 10#{px} -10#{p}x -10#{p}x;
+  test-219: 10#{px}- 10#{p}x- 10#{p}x;
+  test-220: 10#{px} - 10#{p}x - 10#{p}x;
+  test-221: 10#{p}x-10#{p}x-10#{p}x;
+  test-222: 10#{p}x -10#{p}x -10#{p}x;
+  test-223: 10#{p}x- 10#{p}x- 10#{p}x;
+  test-224: 10#{p}x - 10#{p}x - 10#{p}x;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/error b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/error
new file mode 100644
index 0000000000..2baabdf55b
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/error
@@ -0,0 +1,3 @@
+Error: Invalid CSS after "  test-17: .25-#{": expected expression (e.g. 1px, bold), was ".}25;"
+        on line 18 of /sass/sass-spec/spec/parser/operations/subtract/fractions/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/input.scss
new file mode 100644
index 0000000000..3cac0ec12c
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: .25-.25;
+  test-2: .25 -.25;
+  test-3: .25- .25;
+  test-4: .25 - .25;
+  test-5: .25--.25;
+  test-6: .25 --.25;
+  test-7: .25- -.25;
+  test-8: .25 - -.25;
+  test-9: .25-#{.25};
+  test-10: .25 -#{.25};
+  test-11: .25- #{.25};
+  test-12: .25 - #{.25};
+  test-13: .25-#{-.25};
+  test-14: .25 -#{-.25};
+  test-15: .25- #{-.25};
+  test-16: .25 - #{-.25};
+  test-17: .25-#{.}25;
+  test-18: .25 -#{.}25;
+  test-19: .25- #{.}25;
+  test-20: .25 - #{.}25;
+  test-21: -.25--.25;
+  test-22: -.25 --.25;
+  test-23: -.25- -.25;
+  test-24: -.25 - -.25;
+  test-25: -.25-#{.25};
+  test-26: -.25 -#{.25};
+  test-27: -.25- #{.25};
+  test-28: -.25 - #{.25};
+  test-29: -.25-#{-.25};
+  test-30: -.25 -#{-.25};
+  test-31: -.25- #{-.25};
+  test-32: -.25 - #{-.25};
+  test-33: -.25-#{.}25;
+  test-34: -.25 -#{.}25;
+  test-35: -.25- #{.}25;
+  test-36: -.25 - #{.}25;
+  test-37: #{.25}-#{.25};
+  test-38: #{.25} -#{.25};
+  test-39: #{.25}- #{.25};
+  test-40: #{.25} - #{.25};
+  test-41: #{.25}-#{-.25};
+  test-42: #{.25} -#{-.25};
+  test-43: #{.25}- #{-.25};
+  test-44: #{.25} - #{-.25};
+  test-45: #{.25}-#{.}25;
+  test-46: #{.25} -#{.}25;
+  test-47: #{.25}- #{.}25;
+  test-48: #{.25} - #{.}25;
+  test-49: #{-.25}-#{-.25};
+  test-50: #{-.25} -#{-.25};
+  test-51: #{-.25}- #{-.25};
+  test-52: #{-.25} - #{-.25};
+  test-53: #{-.25}-#{.}25;
+  test-54: #{-.25} -#{.}25;
+  test-55: #{-.25}- #{.}25;
+  test-56: #{-.25} - #{.}25;
+  test-57: #{.}25-#{.}25;
+  test-58: #{.}25 -#{.}25;
+  test-59: #{.}25- #{.}25;
+  test-60: #{.}25 - #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/status b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/fractions/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/fractions/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/fractions/tripplets/input.scss
new file mode 100644
index 0000000000..79b335103f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/fractions/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: .25-.25-.25;
+  test-2: .25 -.25 -.25;
+  test-3: .25- .25- .25;
+  test-4: .25 - .25 - .25;
+  test-5: .25-.25--.25;
+  test-6: .25 -.25 --.25;
+  test-7: .25- .25- -.25;
+  test-8: .25 - .25 - -.25;
+  test-9: .25-.25-#{.25};
+  test-10: .25 -.25 -#{.25};
+  test-11: .25- .25- #{.25};
+  test-12: .25 - .25 - #{.25};
+  test-13: .25-.25-#{-.25};
+  test-14: .25 -.25 -#{-.25};
+  test-15: .25- .25- #{-.25};
+  test-16: .25 - .25 - #{-.25};
+  test-17: .25-.25-#{.}25;
+  test-18: .25 -.25 -#{.}25;
+  test-19: .25- .25- #{.}25;
+  test-20: .25 - .25 - #{.}25;
+  test-21: .25--.25--.25;
+  test-22: .25 --.25 --.25;
+  test-23: .25- -.25- -.25;
+  test-24: .25 - -.25 - -.25;
+  test-25: .25--.25-#{.25};
+  test-26: .25 --.25 -#{.25};
+  test-27: .25- -.25- #{.25};
+  test-28: .25 - -.25 - #{.25};
+  test-29: .25--.25-#{-.25};
+  test-30: .25 --.25 -#{-.25};
+  test-31: .25- -.25- #{-.25};
+  test-32: .25 - -.25 - #{-.25};
+  test-33: .25--.25-#{.}25;
+  test-34: .25 --.25 -#{.}25;
+  test-35: .25- -.25- #{.}25;
+  test-36: .25 - -.25 - #{.}25;
+  test-37: .25-#{.25}-#{.25};
+  test-38: .25 -#{.25} -#{.25};
+  test-39: .25- #{.25}- #{.25};
+  test-40: .25 - #{.25} - #{.25};
+  test-41: .25-#{.25}-#{-.25};
+  test-42: .25 -#{.25} -#{-.25};
+  test-43: .25- #{.25}- #{-.25};
+  test-44: .25 - #{.25} - #{-.25};
+  test-45: .25-#{.25}-#{.}25;
+  test-46: .25 -#{.25} -#{.}25;
+  test-47: .25- #{.25}- #{.}25;
+  test-48: .25 - #{.25} - #{.}25;
+  test-49: .25-#{-.25}-#{-.25};
+  test-50: .25 -#{-.25} -#{-.25};
+  test-51: .25- #{-.25}- #{-.25};
+  test-52: .25 - #{-.25} - #{-.25};
+  test-53: .25-#{-.25}-#{.}25;
+  test-54: .25 -#{-.25} -#{.}25;
+  test-55: .25- #{-.25}- #{.}25;
+  test-56: .25 - #{-.25} - #{.}25;
+  test-57: .25-#{.}25-#{.}25;
+  test-58: .25 -#{.}25 -#{.}25;
+  test-59: .25- #{.}25- #{.}25;
+  test-60: .25 - #{.}25 - #{.}25;
+  test-61: -.25--.25--.25;
+  test-62: -.25 --.25 --.25;
+  test-63: -.25- -.25- -.25;
+  test-64: -.25 - -.25 - -.25;
+  test-65: -.25--.25-#{.25};
+  test-66: -.25 --.25 -#{.25};
+  test-67: -.25- -.25- #{.25};
+  test-68: -.25 - -.25 - #{.25};
+  test-69: -.25--.25-#{-.25};
+  test-70: -.25 --.25 -#{-.25};
+  test-71: -.25- -.25- #{-.25};
+  test-72: -.25 - -.25 - #{-.25};
+  test-73: -.25--.25-#{.}25;
+  test-74: -.25 --.25 -#{.}25;
+  test-75: -.25- -.25- #{.}25;
+  test-76: -.25 - -.25 - #{.}25;
+  test-77: -.25-#{.25}-#{.25};
+  test-78: -.25 -#{.25} -#{.25};
+  test-79: -.25- #{.25}- #{.25};
+  test-80: -.25 - #{.25} - #{.25};
+  test-81: -.25-#{.25}-#{-.25};
+  test-82: -.25 -#{.25} -#{-.25};
+  test-83: -.25- #{.25}- #{-.25};
+  test-84: -.25 - #{.25} - #{-.25};
+  test-85: -.25-#{.25}-#{.}25;
+  test-86: -.25 -#{.25} -#{.}25;
+  test-87: -.25- #{.25}- #{.}25;
+  test-88: -.25 - #{.25} - #{.}25;
+  test-89: -.25-#{-.25}-#{-.25};
+  test-90: -.25 -#{-.25} -#{-.25};
+  test-91: -.25- #{-.25}- #{-.25};
+  test-92: -.25 - #{-.25} - #{-.25};
+  test-93: -.25-#{-.25}-#{.}25;
+  test-94: -.25 -#{-.25} -#{.}25;
+  test-95: -.25- #{-.25}- #{.}25;
+  test-96: -.25 - #{-.25} - #{.}25;
+  test-97: -.25-#{.}25-#{.}25;
+  test-98: -.25 -#{.}25 -#{.}25;
+  test-99: -.25- #{.}25- #{.}25;
+  test-100: -.25 - #{.}25 - #{.}25;
+  test-101: #{.25}-#{.25}-#{.25};
+  test-102: #{.25} -#{.25} -#{.25};
+  test-103: #{.25}- #{.25}- #{.25};
+  test-104: #{.25} - #{.25} - #{.25};
+  test-105: #{.25}-#{.25}-#{-.25};
+  test-106: #{.25} -#{.25} -#{-.25};
+  test-107: #{.25}- #{.25}- #{-.25};
+  test-108: #{.25} - #{.25} - #{-.25};
+  test-109: #{.25}-#{.25}-#{.}25;
+  test-110: #{.25} -#{.25} -#{.}25;
+  test-111: #{.25}- #{.25}- #{.}25;
+  test-112: #{.25} - #{.25} - #{.}25;
+  test-113: #{.25}-#{-.25}-#{-.25};
+  test-114: #{.25} -#{-.25} -#{-.25};
+  test-115: #{.25}- #{-.25}- #{-.25};
+  test-116: #{.25} - #{-.25} - #{-.25};
+  test-117: #{.25}-#{-.25}-#{.}25;
+  test-118: #{.25} -#{-.25} -#{.}25;
+  test-119: #{.25}- #{-.25}- #{.}25;
+  test-120: #{.25} - #{-.25} - #{.}25;
+  test-121: #{.25}-#{.}25-#{.}25;
+  test-122: #{.25} -#{.}25 -#{.}25;
+  test-123: #{.25}- #{.}25- #{.}25;
+  test-124: #{.25} - #{.}25 - #{.}25;
+  test-125: #{-.25}-#{-.25}-#{-.25};
+  test-126: #{-.25} -#{-.25} -#{-.25};
+  test-127: #{-.25}- #{-.25}- #{-.25};
+  test-128: #{-.25} - #{-.25} - #{-.25};
+  test-129: #{-.25}-#{-.25}-#{.}25;
+  test-130: #{-.25} -#{-.25} -#{.}25;
+  test-131: #{-.25}- #{-.25}- #{.}25;
+  test-132: #{-.25} - #{-.25} - #{.}25;
+  test-133: #{-.25}-#{.}25-#{.}25;
+  test-134: #{-.25} -#{.}25 -#{.}25;
+  test-135: #{-.25}- #{.}25- #{.}25;
+  test-136: #{-.25} - #{.}25 - #{.}25;
+  test-137: #{.}25-#{.}25-#{.}25;
+  test-138: #{.}25 -#{.}25 -#{.}25;
+  test-139: #{.}25- #{.}25- #{.}25;
+  test-140: #{.}25 - #{.}25 - #{.}25;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/error b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/error
new file mode 100644
index 0000000000..9fe05083c4
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/error
@@ -0,0 +1,3 @@
+Error: Incompatible units: 'px' and '%'.
+        on line 26 of /sass/sass-spec/spec/parser/operations/subtract/mixed/pairs/input.scss
+  Use --trace for backtrace.
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/expected_output.css
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/input.scss
new file mode 100644
index 0000000000..9b86ebedb5
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: 10-10;
+  test-2: 10 -10;
+  test-3: 10- 10;
+  test-4: 10 - 10;
+  test-5: 10-10%;
+  test-6: 10 -10%;
+  test-7: 10- 10%;
+  test-8: 10 - 10%;
+  test-9: 10-10px;
+  test-10: 10 -10px;
+  test-11: 10- 10px;
+  test-12: 10 - 10px;
+  test-13: 10-#AAA;
+  test-14: 10 -#AAA;
+  test-15: 10- #AAA;
+  test-16: 10 - #AAA;
+  test-17: 10-#{itpl};
+  test-18: 10 -#{itpl};
+  test-19: 10- #{itpl};
+  test-20: 10 - #{itpl};
+  test-21: 10%-10%;
+  test-22: 10% -10%;
+  test-23: 10%- 10%;
+  test-24: 10% - 10%;
+  test-25: 10%-10px;
+  test-26: 10% -10px;
+  test-27: 10%- 10px;
+  test-28: 10% - 10px;
+  test-29: 10%-#AAA;
+  test-30: 10% -#AAA;
+  test-31: 10%- #AAA;
+  test-32: 10% - #AAA;
+  test-33: 10%-#{itpl};
+  test-34: 10% -#{itpl};
+  test-35: 10%- #{itpl};
+  test-36: 10% - #{itpl};
+  test-37: 10px-10px;
+  test-38: 10px -10px;
+  test-39: 10px- 10px;
+  test-40: 10px - 10px;
+  test-41: 10px-#AAA;
+  test-42: 10px -#AAA;
+  test-43: 10px- #AAA;
+  test-44: 10px - #AAA;
+  test-45: 10px-#{itpl};
+  test-46: 10px -#{itpl};
+  test-47: 10px- #{itpl};
+  test-48: 10px - #{itpl};
+  test-49: #AAA-#AAA;
+  test-50: #AAA -#AAA;
+  test-51: #AAA- #AAA;
+  test-52: #AAA - #AAA;
+  test-53: #AAA-#{itpl};
+  test-54: #AAA -#{itpl};
+  test-55: #AAA- #{itpl};
+  test-56: #AAA - #{itpl};
+  test-57: #{itpl}-#{itpl};
+  test-58: #{itpl} -#{itpl};
+  test-59: #{itpl}- #{itpl};
+  test-60: #{itpl} - #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/status b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/status
new file mode 100644
index 0000000000..b44fe09a7a
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/mixed/pairs/status
@@ -0,0 +1 @@
+65
\ No newline at end of file
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/mixed/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/mixed/tripplets/input.scss
new file mode 100644
index 0000000000..a2f15a31c3
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/mixed/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: 10-10-10;
+  test-2: 10 -10 -10;
+  test-3: 10- 10- 10;
+  test-4: 10 - 10 - 10;
+  test-5: 10-10-10%;
+  test-6: 10 -10 -10%;
+  test-7: 10- 10- 10%;
+  test-8: 10 - 10 - 10%;
+  test-9: 10-10-10px;
+  test-10: 10 -10 -10px;
+  test-11: 10- 10- 10px;
+  test-12: 10 - 10 - 10px;
+  test-13: 10-10-#AAA;
+  test-14: 10 -10 -#AAA;
+  test-15: 10- 10- #AAA;
+  test-16: 10 - 10 - #AAA;
+  test-17: 10-10-#{itpl};
+  test-18: 10 -10 -#{itpl};
+  test-19: 10- 10- #{itpl};
+  test-20: 10 - 10 - #{itpl};
+  test-21: 10-10%-10%;
+  test-22: 10 -10% -10%;
+  test-23: 10- 10%- 10%;
+  test-24: 10 - 10% - 10%;
+  test-25: 10-10%-10px;
+  test-26: 10 -10% -10px;
+  test-27: 10- 10%- 10px;
+  test-28: 10 - 10% - 10px;
+  test-29: 10-10%-#AAA;
+  test-30: 10 -10% -#AAA;
+  test-31: 10- 10%- #AAA;
+  test-32: 10 - 10% - #AAA;
+  test-33: 10-10%-#{itpl};
+  test-34: 10 -10% -#{itpl};
+  test-35: 10- 10%- #{itpl};
+  test-36: 10 - 10% - #{itpl};
+  test-37: 10-10px-10px;
+  test-38: 10 -10px -10px;
+  test-39: 10- 10px- 10px;
+  test-40: 10 - 10px - 10px;
+  test-41: 10-10px-#AAA;
+  test-42: 10 -10px -#AAA;
+  test-43: 10- 10px- #AAA;
+  test-44: 10 - 10px - #AAA;
+  test-45: 10-10px-#{itpl};
+  test-46: 10 -10px -#{itpl};
+  test-47: 10- 10px- #{itpl};
+  test-48: 10 - 10px - #{itpl};
+  test-49: 10-#AAA-#AAA;
+  test-50: 10 -#AAA -#AAA;
+  test-51: 10- #AAA- #AAA;
+  test-52: 10 - #AAA - #AAA;
+  test-53: 10-#AAA-#{itpl};
+  test-54: 10 -#AAA -#{itpl};
+  test-55: 10- #AAA- #{itpl};
+  test-56: 10 - #AAA - #{itpl};
+  test-57: 10-#{itpl}-#{itpl};
+  test-58: 10 -#{itpl} -#{itpl};
+  test-59: 10- #{itpl}- #{itpl};
+  test-60: 10 - #{itpl} - #{itpl};
+  test-61: 10%-10%-10%;
+  test-62: 10% -10% -10%;
+  test-63: 10%- 10%- 10%;
+  test-64: 10% - 10% - 10%;
+  test-65: 10%-10%-10px;
+  test-66: 10% -10% -10px;
+  test-67: 10%- 10%- 10px;
+  test-68: 10% - 10% - 10px;
+  test-69: 10%-10%-#AAA;
+  test-70: 10% -10% -#AAA;
+  test-71: 10%- 10%- #AAA;
+  test-72: 10% - 10% - #AAA;
+  test-73: 10%-10%-#{itpl};
+  test-74: 10% -10% -#{itpl};
+  test-75: 10%- 10%- #{itpl};
+  test-76: 10% - 10% - #{itpl};
+  test-77: 10%-10px-10px;
+  test-78: 10% -10px -10px;
+  test-79: 10%- 10px- 10px;
+  test-80: 10% - 10px - 10px;
+  test-81: 10%-10px-#AAA;
+  test-82: 10% -10px -#AAA;
+  test-83: 10%- 10px- #AAA;
+  test-84: 10% - 10px - #AAA;
+  test-85: 10%-10px-#{itpl};
+  test-86: 10% -10px -#{itpl};
+  test-87: 10%- 10px- #{itpl};
+  test-88: 10% - 10px - #{itpl};
+  test-89: 10%-#AAA-#AAA;
+  test-90: 10% -#AAA -#AAA;
+  test-91: 10%- #AAA- #AAA;
+  test-92: 10% - #AAA - #AAA;
+  test-93: 10%-#AAA-#{itpl};
+  test-94: 10% -#AAA -#{itpl};
+  test-95: 10%- #AAA- #{itpl};
+  test-96: 10% - #AAA - #{itpl};
+  test-97: 10%-#{itpl}-#{itpl};
+  test-98: 10% -#{itpl} -#{itpl};
+  test-99: 10%- #{itpl}- #{itpl};
+  test-100: 10% - #{itpl} - #{itpl};
+  test-101: 10px-10px-10px;
+  test-102: 10px -10px -10px;
+  test-103: 10px- 10px- 10px;
+  test-104: 10px - 10px - 10px;
+  test-105: 10px-10px-#AAA;
+  test-106: 10px -10px -#AAA;
+  test-107: 10px- 10px- #AAA;
+  test-108: 10px - 10px - #AAA;
+  test-109: 10px-10px-#{itpl};
+  test-110: 10px -10px -#{itpl};
+  test-111: 10px- 10px- #{itpl};
+  test-112: 10px - 10px - #{itpl};
+  test-113: 10px-#AAA-#AAA;
+  test-114: 10px -#AAA -#AAA;
+  test-115: 10px- #AAA- #AAA;
+  test-116: 10px - #AAA - #AAA;
+  test-117: 10px-#AAA-#{itpl};
+  test-118: 10px -#AAA -#{itpl};
+  test-119: 10px- #AAA- #{itpl};
+  test-120: 10px - #AAA - #{itpl};
+  test-121: 10px-#{itpl}-#{itpl};
+  test-122: 10px -#{itpl} -#{itpl};
+  test-123: 10px- #{itpl}- #{itpl};
+  test-124: 10px - #{itpl} - #{itpl};
+  test-125: #AAA-#AAA-#AAA;
+  test-126: #AAA -#AAA -#AAA;
+  test-127: #AAA- #AAA- #AAA;
+  test-128: #AAA - #AAA - #AAA;
+  test-129: #AAA-#AAA-#{itpl};
+  test-130: #AAA -#AAA -#{itpl};
+  test-131: #AAA- #AAA- #{itpl};
+  test-132: #AAA - #AAA - #{itpl};
+  test-133: #AAA-#{itpl}-#{itpl};
+  test-134: #AAA -#{itpl} -#{itpl};
+  test-135: #AAA- #{itpl}- #{itpl};
+  test-136: #AAA - #{itpl} - #{itpl};
+  test-137: #{itpl}-#{itpl}-#{itpl};
+  test-138: #{itpl} -#{itpl} -#{itpl};
+  test-139: #{itpl}- #{itpl}- #{itpl};
+  test-140: #{itpl} - #{itpl} - #{itpl};
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compact.css
new file mode 100644
index 0000000000..fa7a69a7c2
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: 0; test-2: 10 -10; test-3: 0; test-4: 0; test-5: 10-10; test-6: 10 -10; test-7: 10- 10; test-8: 10 - 10; test-9: 90; test-10: 10 -10; test-11: 90; test-12: 90; test-13: 10-10; test-14: 10 -10; test-15: 10- 10; test-16: 10 - 10; test-17: 10-10; test-18: 10 -10; test-19: 10- 10; test-20: 10 - 10; test-21: 10-10; test-22: 10 -10; test-23: 10- 10; test-24: 10 - 10; test-25: 10-10; test-26: 10 -10; test-27: 10- 10; test-28: 10 - 10; test-29: 10-10; test-30: 10 -10; test-31: 10- 10; test-32: 10 - 10; test-33: 10-10; test-34: 10 -10; test-35: 10- 10; test-36: 10 - 10; test-37: 10-10; test-38: 10 -10; test-39: 10- 10; test-40: 10 - 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compressed.css
new file mode 100644
index 0000000000..3b3fe68d33
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:0;test-2:10 -10;test-3:0;test-4:0;test-5:10-10;test-6:10 -10;test-7:10- 10;test-8:10 - 10;test-9:90;test-10:10 -10;test-11:90;test-12:90;test-13:10-10;test-14:10 -10;test-15:10- 10;test-16:10 - 10;test-17:10-10;test-18:10 -10;test-19:10- 10;test-20:10 - 10;test-21:10-10;test-22:10 -10;test-23:10- 10;test-24:10 - 10;test-25:10-10;test-26:10 -10;test-27:10- 10;test-28:10 - 10;test-29:10-10;test-30:10 -10;test-31:10- 10;test-32:10 - 10;test-33:10-10;test-34:10 -10;test-35:10- 10;test-36:10 - 10;test-37:10-10;test-38:10 -10;test-39:10- 10;test-40:10 - 10}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.expanded.css
new file mode 100644
index 0000000000..b72236dbff
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected.expanded.css
@@ -0,0 +1,42 @@
+foo {
+  test-1: 0;
+  test-2: 10 -10;
+  test-3: 0;
+  test-4: 0;
+  test-5: 10-10;
+  test-6: 10 -10;
+  test-7: 10- 10;
+  test-8: 10 - 10;
+  test-9: 90;
+  test-10: 10 -10;
+  test-11: 90;
+  test-12: 90;
+  test-13: 10-10;
+  test-14: 10 -10;
+  test-15: 10- 10;
+  test-16: 10 - 10;
+  test-17: 10-10;
+  test-18: 10 -10;
+  test-19: 10- 10;
+  test-20: 10 - 10;
+  test-21: 10-10;
+  test-22: 10 -10;
+  test-23: 10- 10;
+  test-24: 10 - 10;
+  test-25: 10-10;
+  test-26: 10 -10;
+  test-27: 10- 10;
+  test-28: 10 - 10;
+  test-29: 10-10;
+  test-30: 10 -10;
+  test-31: 10- 10;
+  test-32: 10 - 10;
+  test-33: 10-10;
+  test-34: 10 -10;
+  test-35: 10- 10;
+  test-36: 10 - 10;
+  test-37: 10-10;
+  test-38: 10 -10;
+  test-39: 10- 10;
+  test-40: 10 - 10;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected_output.css
new file mode 100644
index 0000000000..2982c08084
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/expected_output.css
@@ -0,0 +1,41 @@
+foo {
+  test-1: 0;
+  test-2: 10 -10;
+  test-3: 0;
+  test-4: 0;
+  test-5: 10-10;
+  test-6: 10 -10;
+  test-7: 10- 10;
+  test-8: 10 - 10;
+  test-9: 90;
+  test-10: 10 -10;
+  test-11: 90;
+  test-12: 90;
+  test-13: 10-10;
+  test-14: 10 -10;
+  test-15: 10- 10;
+  test-16: 10 - 10;
+  test-17: 10-10;
+  test-18: 10 -10;
+  test-19: 10- 10;
+  test-20: 10 - 10;
+  test-21: 10-10;
+  test-22: 10 -10;
+  test-23: 10- 10;
+  test-24: 10 - 10;
+  test-25: 10-10;
+  test-26: 10 -10;
+  test-27: 10- 10;
+  test-28: 10 - 10;
+  test-29: 10-10;
+  test-30: 10 -10;
+  test-31: 10- 10;
+  test-32: 10 - 10;
+  test-33: 10-10;
+  test-34: 10 -10;
+  test-35: 10- 10;
+  test-36: 10 - 10;
+  test-37: 10-10;
+  test-38: 10 -10;
+  test-39: 10- 10;
+  test-40: 10 - 10; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/input.scss
new file mode 100644
index 0000000000..77f0f8f3a0
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/pairs/input.scss
@@ -0,0 +1,42 @@
+foo {
+  test-1: 10-10;
+  test-2: 10 -10;
+  test-3: 10- 10;
+  test-4: 10 - 10;
+  test-5: 10-#{10};
+  test-6: 10 -#{10};
+  test-7: 10- #{10};
+  test-8: 10 - #{10};
+  test-9: 10-1#{0};
+  test-10: 10 -1#{0};
+  test-11: 10- 1#{0};
+  test-12: 10 - 1#{0};
+  test-13: 10-#{1}0;
+  test-14: 10 -#{1}0;
+  test-15: 10- #{1}0;
+  test-16: 10 - #{1}0;
+  test-17: #{10}-#{10};
+  test-18: #{10} -#{10};
+  test-19: #{10}- #{10};
+  test-20: #{10} - #{10};
+  test-21: #{10}-1#{0};
+  test-22: #{10} -1#{0};
+  test-23: #{10}- 1#{0};
+  test-24: #{10} - 1#{0};
+  test-25: #{10}-#{1}0;
+  test-26: #{10} -#{1}0;
+  test-27: #{10}- #{1}0;
+  test-28: #{10} - #{1}0;
+  test-29: 1#{0}-1#{0};
+  test-30: 1#{0} -1#{0};
+  test-31: 1#{0}- 1#{0};
+  test-32: 1#{0} - 1#{0};
+  test-33: 1#{0}-#{1}0;
+  test-34: 1#{0} -#{1}0;
+  test-35: 1#{0}- #{1}0;
+  test-36: 1#{0} - #{1}0;
+  test-37: #{1}0-#{1}0;
+  test-38: #{1}0 -#{1}0;
+  test-39: #{1}0- #{1}0;
+  test-40: #{1}0 - #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/numbers/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/numbers/tripplets/input.scss
new file mode 100644
index 0000000000..ac4b9d20ff
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/numbers/tripplets/input.scss
@@ -0,0 +1,82 @@
+foo {
+  test-1: 10-10-10;
+  test-2: 10 -10 -10;
+  test-3: 10- 10- 10;
+  test-4: 10 - 10 - 10;
+  test-5: 10-10-#{10};
+  test-6: 10 -10 -#{10};
+  test-7: 10- 10- #{10};
+  test-8: 10 - 10 - #{10};
+  test-9: 10-10-1#{0};
+  test-10: 10 -10 -1#{0};
+  test-11: 10- 10- 1#{0};
+  test-12: 10 - 10 - 1#{0};
+  test-13: 10-10-#{1}0;
+  test-14: 10 -10 -#{1}0;
+  test-15: 10- 10- #{1}0;
+  test-16: 10 - 10 - #{1}0;
+  test-17: 10-#{10}-#{10};
+  test-18: 10 -#{10} -#{10};
+  test-19: 10- #{10}- #{10};
+  test-20: 10 - #{10} - #{10};
+  test-21: 10-#{10}-1#{0};
+  test-22: 10 -#{10} -1#{0};
+  test-23: 10- #{10}- 1#{0};
+  test-24: 10 - #{10} - 1#{0};
+  test-25: 10-#{10}-#{1}0;
+  test-26: 10 -#{10} -#{1}0;
+  test-27: 10- #{10}- #{1}0;
+  test-28: 10 - #{10} - #{1}0;
+  test-29: 10-1#{0}-1#{0};
+  test-30: 10 -1#{0} -1#{0};
+  test-31: 10- 1#{0}- 1#{0};
+  test-32: 10 - 1#{0} - 1#{0};
+  test-33: 10-1#{0}-#{1}0;
+  test-34: 10 -1#{0} -#{1}0;
+  test-35: 10- 1#{0}- #{1}0;
+  test-36: 10 - 1#{0} - #{1}0;
+  test-37: 10-#{1}0-#{1}0;
+  test-38: 10 -#{1}0 -#{1}0;
+  test-39: 10- #{1}0- #{1}0;
+  test-40: 10 - #{1}0 - #{1}0;
+  test-41: #{10}-#{10}-#{10};
+  test-42: #{10} -#{10} -#{10};
+  test-43: #{10}- #{10}- #{10};
+  test-44: #{10} - #{10} - #{10};
+  test-45: #{10}-#{10}-1#{0};
+  test-46: #{10} -#{10} -1#{0};
+  test-47: #{10}- #{10}- 1#{0};
+  test-48: #{10} - #{10} - 1#{0};
+  test-49: #{10}-#{10}-#{1}0;
+  test-50: #{10} -#{10} -#{1}0;
+  test-51: #{10}- #{10}- #{1}0;
+  test-52: #{10} - #{10} - #{1}0;
+  test-53: #{10}-1#{0}-1#{0};
+  test-54: #{10} -1#{0} -1#{0};
+  test-55: #{10}- 1#{0}- 1#{0};
+  test-56: #{10} - 1#{0} - 1#{0};
+  test-57: #{10}-1#{0}-#{1}0;
+  test-58: #{10} -1#{0} -#{1}0;
+  test-59: #{10}- 1#{0}- #{1}0;
+  test-60: #{10} - 1#{0} - #{1}0;
+  test-61: #{10}-#{1}0-#{1}0;
+  test-62: #{10} -#{1}0 -#{1}0;
+  test-63: #{10}- #{1}0- #{1}0;
+  test-64: #{10} - #{1}0 - #{1}0;
+  test-65: 1#{0}-1#{0}-1#{0};
+  test-66: 1#{0} -1#{0} -1#{0};
+  test-67: 1#{0}- 1#{0}- 1#{0};
+  test-68: 1#{0} - 1#{0} - 1#{0};
+  test-69: 1#{0}-1#{0}-#{1}0;
+  test-70: 1#{0} -1#{0} -#{1}0;
+  test-71: 1#{0}- 1#{0}- #{1}0;
+  test-72: 1#{0} - 1#{0} - #{1}0;
+  test-73: 1#{0}-#{1}0-#{1}0;
+  test-74: 1#{0} -#{1}0 -#{1}0;
+  test-75: 1#{0}- #{1}0- #{1}0;
+  test-76: 1#{0} - #{1}0 - #{1}0;
+  test-77: #{1}0-#{1}0-#{1}0;
+  test-78: #{1}0 -#{1}0 -#{1}0;
+  test-79: #{1}0- #{1}0- #{1}0;
+  test-80: #{1}0 - #{1}0 - #{1}0;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compact.css b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compact.css
new file mode 100644
index 0000000000..8da5490604
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compact.css
@@ -0,0 +1 @@
+foo { test-1: literal-literal; test-2: literal -literal; test-3: literal- literal; test-4: literal-literal; test-5: literal- "quoted"; test-6: literal-"quoted"; test-7: literal- "quoted"; test-8: literal-"quoted"; test-9: literal-interpolant; test-10: literal -interpolant; test-11: literal- interpolant; test-12: literal - interpolant; test-13: literal-lschema_ritlp; test-14: literal -lschema_ritlp; test-15: literal- lschema_ritlp; test-16: literal-lschema_ritlp; test-17: literal-litlp_rschema; test-18: literal -litlp_rschema; test-19: literal- litlp_rschema; test-20: literal - litlp_rschema; test-21: "quoted"-"quoted"; test-22: "quoted"-"quoted"; test-23: "quoted"-"quoted"; test-24: "quoted"-"quoted"; test-25: "quoted"-interpolant; test-26: "quoted" -interpolant; test-27: "quoted"- interpolant; test-28: "quoted" - interpolant; test-29: "quoted" -lschema_ritlp; test-30: "quoted" -lschema_ritlp; test-31: "quoted"-lschema_ritlp; test-32: "quoted"-lschema_ritlp; test-33: "quoted"-litlp_rschema; test-34: "quoted" -litlp_rschema; test-35: "quoted"- litlp_rschema; test-36: "quoted" - litlp_rschema; test-37: interpolant-interpolant; test-38: interpolant -interpolant; test-39: interpolant- interpolant; test-40: interpolant - interpolant; test-41: interpolant-lschema_ritlp; test-42: interpolant -lschema_ritlp; test-43: interpolant- lschema_ritlp; test-44: interpolant - lschema_ritlp; test-45: interpolant-litlp_rschema; test-46: interpolant -litlp_rschema; test-47: interpolant- litlp_rschema; test-48: interpolant - litlp_rschema; test-49: lschema_ritlp-lschema_ritlp; test-50: lschema_ritlp -lschema_ritlp; test-51: lschema_ritlp- lschema_ritlp; test-52: lschema_ritlp - lschema_ritlp; test-53: lschema_ritlp-litlp_rschema; test-54: lschema_ritlp -litlp_rschema; test-55: lschema_ritlp- litlp_rschema; test-56: lschema_ritlp - litlp_rschema; test-57: litlp_rschema-litlp_rschema; test-58: litlp_rschema -litlp_rschema; test-59: litlp_rschema- litlp_rschema; test-60: litlp_rschema - litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compressed.css b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compressed.css
new file mode 100644
index 0000000000..9bb89b628d
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.compressed.css
@@ -0,0 +1 @@
+foo{test-1:literal-literal;test-2:literal -literal;test-3:literal- literal;test-4:literal-literal;test-5:literal- "quoted";test-6:literal-"quoted";test-7:literal- "quoted";test-8:literal-"quoted";test-9:literal-interpolant;test-10:literal -interpolant;test-11:literal- interpolant;test-12:literal - interpolant;test-13:literal-lschema_ritlp;test-14:literal -lschema_ritlp;test-15:literal- lschema_ritlp;test-16:literal-lschema_ritlp;test-17:literal-litlp_rschema;test-18:literal -litlp_rschema;test-19:literal- litlp_rschema;test-20:literal - litlp_rschema;test-21:"quoted"-"quoted";test-22:"quoted"-"quoted";test-23:"quoted"-"quoted";test-24:"quoted"-"quoted";test-25:"quoted"-interpolant;test-26:"quoted" -interpolant;test-27:"quoted"- interpolant;test-28:"quoted" - interpolant;test-29:"quoted" -lschema_ritlp;test-30:"quoted" -lschema_ritlp;test-31:"quoted"-lschema_ritlp;test-32:"quoted"-lschema_ritlp;test-33:"quoted"-litlp_rschema;test-34:"quoted" -litlp_rschema;test-35:"quoted"- litlp_rschema;test-36:"quoted" - litlp_rschema;test-37:interpolant-interpolant;test-38:interpolant -interpolant;test-39:interpolant- interpolant;test-40:interpolant - interpolant;test-41:interpolant-lschema_ritlp;test-42:interpolant -lschema_ritlp;test-43:interpolant- lschema_ritlp;test-44:interpolant - lschema_ritlp;test-45:interpolant-litlp_rschema;test-46:interpolant -litlp_rschema;test-47:interpolant- litlp_rschema;test-48:interpolant - litlp_rschema;test-49:lschema_ritlp-lschema_ritlp;test-50:lschema_ritlp -lschema_ritlp;test-51:lschema_ritlp- lschema_ritlp;test-52:lschema_ritlp - lschema_ritlp;test-53:lschema_ritlp-litlp_rschema;test-54:lschema_ritlp -litlp_rschema;test-55:lschema_ritlp- litlp_rschema;test-56:lschema_ritlp - litlp_rschema;test-57:litlp_rschema-litlp_rschema;test-58:litlp_rschema -litlp_rschema;test-59:litlp_rschema- litlp_rschema;test-60:litlp_rschema - litlp_rschema}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.expanded.css b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.expanded.css
new file mode 100644
index 0000000000..d1874556e9
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected.expanded.css
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal-literal;
+  test-2: literal -literal;
+  test-3: literal- literal;
+  test-4: literal-literal;
+  test-5: literal- "quoted";
+  test-6: literal-"quoted";
+  test-7: literal- "quoted";
+  test-8: literal-"quoted";
+  test-9: literal-interpolant;
+  test-10: literal -interpolant;
+  test-11: literal- interpolant;
+  test-12: literal - interpolant;
+  test-13: literal-lschema_ritlp;
+  test-14: literal -lschema_ritlp;
+  test-15: literal- lschema_ritlp;
+  test-16: literal-lschema_ritlp;
+  test-17: literal-litlp_rschema;
+  test-18: literal -litlp_rschema;
+  test-19: literal- litlp_rschema;
+  test-20: literal - litlp_rschema;
+  test-21: "quoted"-"quoted";
+  test-22: "quoted"-"quoted";
+  test-23: "quoted"-"quoted";
+  test-24: "quoted"-"quoted";
+  test-25: "quoted"-interpolant;
+  test-26: "quoted" -interpolant;
+  test-27: "quoted"- interpolant;
+  test-28: "quoted" - interpolant;
+  test-29: "quoted" -lschema_ritlp;
+  test-30: "quoted" -lschema_ritlp;
+  test-31: "quoted"-lschema_ritlp;
+  test-32: "quoted"-lschema_ritlp;
+  test-33: "quoted"-litlp_rschema;
+  test-34: "quoted" -litlp_rschema;
+  test-35: "quoted"- litlp_rschema;
+  test-36: "quoted" - litlp_rschema;
+  test-37: interpolant-interpolant;
+  test-38: interpolant -interpolant;
+  test-39: interpolant- interpolant;
+  test-40: interpolant - interpolant;
+  test-41: interpolant-lschema_ritlp;
+  test-42: interpolant -lschema_ritlp;
+  test-43: interpolant- lschema_ritlp;
+  test-44: interpolant - lschema_ritlp;
+  test-45: interpolant-litlp_rschema;
+  test-46: interpolant -litlp_rschema;
+  test-47: interpolant- litlp_rschema;
+  test-48: interpolant - litlp_rschema;
+  test-49: lschema_ritlp-lschema_ritlp;
+  test-50: lschema_ritlp -lschema_ritlp;
+  test-51: lschema_ritlp- lschema_ritlp;
+  test-52: lschema_ritlp - lschema_ritlp;
+  test-53: lschema_ritlp-litlp_rschema;
+  test-54: lschema_ritlp -litlp_rschema;
+  test-55: lschema_ritlp- litlp_rschema;
+  test-56: lschema_ritlp - litlp_rschema;
+  test-57: litlp_rschema-litlp_rschema;
+  test-58: litlp_rschema -litlp_rschema;
+  test-59: litlp_rschema- litlp_rschema;
+  test-60: litlp_rschema - litlp_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected_output.css b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected_output.css
new file mode 100644
index 0000000000..978e71056f
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/expected_output.css
@@ -0,0 +1,61 @@
+foo {
+  test-1: literal-literal;
+  test-2: literal -literal;
+  test-3: literal- literal;
+  test-4: literal-literal;
+  test-5: literal- "quoted";
+  test-6: literal-"quoted";
+  test-7: literal- "quoted";
+  test-8: literal-"quoted";
+  test-9: literal-interpolant;
+  test-10: literal -interpolant;
+  test-11: literal- interpolant;
+  test-12: literal - interpolant;
+  test-13: literal-lschema_ritlp;
+  test-14: literal -lschema_ritlp;
+  test-15: literal- lschema_ritlp;
+  test-16: literal-lschema_ritlp;
+  test-17: literal-litlp_rschema;
+  test-18: literal -litlp_rschema;
+  test-19: literal- litlp_rschema;
+  test-20: literal - litlp_rschema;
+  test-21: "quoted"-"quoted";
+  test-22: "quoted"-"quoted";
+  test-23: "quoted"-"quoted";
+  test-24: "quoted"-"quoted";
+  test-25: "quoted"-interpolant;
+  test-26: "quoted" -interpolant;
+  test-27: "quoted"- interpolant;
+  test-28: "quoted" - interpolant;
+  test-29: "quoted" -lschema_ritlp;
+  test-30: "quoted" -lschema_ritlp;
+  test-31: "quoted"-lschema_ritlp;
+  test-32: "quoted"-lschema_ritlp;
+  test-33: "quoted"-litlp_rschema;
+  test-34: "quoted" -litlp_rschema;
+  test-35: "quoted"- litlp_rschema;
+  test-36: "quoted" - litlp_rschema;
+  test-37: interpolant-interpolant;
+  test-38: interpolant -interpolant;
+  test-39: interpolant- interpolant;
+  test-40: interpolant - interpolant;
+  test-41: interpolant-lschema_ritlp;
+  test-42: interpolant -lschema_ritlp;
+  test-43: interpolant- lschema_ritlp;
+  test-44: interpolant - lschema_ritlp;
+  test-45: interpolant-litlp_rschema;
+  test-46: interpolant -litlp_rschema;
+  test-47: interpolant- litlp_rschema;
+  test-48: interpolant - litlp_rschema;
+  test-49: lschema_ritlp-lschema_ritlp;
+  test-50: lschema_ritlp -lschema_ritlp;
+  test-51: lschema_ritlp- lschema_ritlp;
+  test-52: lschema_ritlp - lschema_ritlp;
+  test-53: lschema_ritlp-litlp_rschema;
+  test-54: lschema_ritlp -litlp_rschema;
+  test-55: lschema_ritlp- litlp_rschema;
+  test-56: lschema_ritlp - litlp_rschema;
+  test-57: litlp_rschema-litlp_rschema;
+  test-58: litlp_rschema -litlp_rschema;
+  test-59: litlp_rschema- litlp_rschema;
+  test-60: litlp_rschema - litlp_rschema; }
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/input.scss
new file mode 100644
index 0000000000..512654fb79
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/pairs/input.scss
@@ -0,0 +1,62 @@
+foo {
+  test-1: literal-literal;
+  test-2: literal -literal;
+  test-3: literal- literal;
+  test-4: literal - literal;
+  test-5: literal-"quoted";
+  test-6: literal -"quoted";
+  test-7: literal- "quoted";
+  test-8: literal - "quoted";
+  test-9: literal-#{interpolant};
+  test-10: literal -#{interpolant};
+  test-11: literal- #{interpolant};
+  test-12: literal - #{interpolant};
+  test-13: literal-lschema_#{ritlp};
+  test-14: literal -lschema_#{ritlp};
+  test-15: literal- lschema_#{ritlp};
+  test-16: literal - lschema_#{ritlp};
+  test-17: literal-#{litlp}_rschema;
+  test-18: literal -#{litlp}_rschema;
+  test-19: literal- #{litlp}_rschema;
+  test-20: literal - #{litlp}_rschema;
+  test-21: "quoted"-"quoted";
+  test-22: "quoted" -"quoted";
+  test-23: "quoted"- "quoted";
+  test-24: "quoted" - "quoted";
+  test-25: "quoted"-#{interpolant};
+  test-26: "quoted" -#{interpolant};
+  test-27: "quoted"- #{interpolant};
+  test-28: "quoted" - #{interpolant};
+  test-29: "quoted"-lschema_#{ritlp};
+  test-30: "quoted" -lschema_#{ritlp};
+  test-31: "quoted"- lschema_#{ritlp};
+  test-32: "quoted" - lschema_#{ritlp};
+  test-33: "quoted"-#{litlp}_rschema;
+  test-34: "quoted" -#{litlp}_rschema;
+  test-35: "quoted"- #{litlp}_rschema;
+  test-36: "quoted" - #{litlp}_rschema;
+  test-37: #{interpolant}-#{interpolant};
+  test-38: #{interpolant} -#{interpolant};
+  test-39: #{interpolant}- #{interpolant};
+  test-40: #{interpolant} - #{interpolant};
+  test-41: #{interpolant}-lschema_#{ritlp};
+  test-42: #{interpolant} -lschema_#{ritlp};
+  test-43: #{interpolant}- lschema_#{ritlp};
+  test-44: #{interpolant} - lschema_#{ritlp};
+  test-45: #{interpolant}-#{litlp}_rschema;
+  test-46: #{interpolant} -#{litlp}_rschema;
+  test-47: #{interpolant}- #{litlp}_rschema;
+  test-48: #{interpolant} - #{litlp}_rschema;
+  test-49: lschema_#{ritlp}-lschema_#{ritlp};
+  test-50: lschema_#{ritlp} -lschema_#{ritlp};
+  test-51: lschema_#{ritlp}- lschema_#{ritlp};
+  test-52: lschema_#{ritlp} - lschema_#{ritlp};
+  test-53: lschema_#{ritlp}-#{litlp}_rschema;
+  test-54: lschema_#{ritlp} -#{litlp}_rschema;
+  test-55: lschema_#{ritlp}- #{litlp}_rschema;
+  test-56: lschema_#{ritlp} - #{litlp}_rschema;
+  test-57: #{litlp}_rschema-#{litlp}_rschema;
+  test-58: #{litlp}_rschema -#{litlp}_rschema;
+  test-59: #{litlp}_rschema- #{litlp}_rschema;
+  test-60: #{litlp}_rschema - #{litlp}_rschema;
+}
diff --git a/spec/libsass-todo-tests/parser/operations/subtract/strings/tripplets/input.scss b/spec/libsass-todo-tests/parser/operations/subtract/strings/tripplets/input.scss
new file mode 100644
index 0000000000..c7cb756359
--- /dev/null
+++ b/spec/libsass-todo-tests/parser/operations/subtract/strings/tripplets/input.scss
@@ -0,0 +1,142 @@
+foo {
+  test-1: literal-literal-literal;
+  test-2: literal -literal -literal;
+  test-3: literal- literal- literal;
+  test-4: literal - literal - literal;
+  test-5: literal-literal-"quoted";
+  test-6: literal -literal -"quoted";
+  test-7: literal- literal- "quoted";
+  test-8: literal - literal - "quoted";
+  test-9: literal-literal-#{interpolant};
+  test-10: literal -literal -#{interpolant};
+  test-11: literal- literal- #{interpolant};
+  test-12: literal - literal - #{interpolant};
+  test-13: literal-literal-lschema_#{ritlp};
+  test-14: literal -literal -lschema_#{ritlp};
+  test-15: literal- literal- lschema_#{ritlp};
+  test-16: literal - literal - lschema_#{ritlp};
+  test-17: literal-literal-#{litlp}_rschema;
+  test-18: literal -literal -#{litlp}_rschema;
+  test-19: literal- literal- #{litlp}_rschema;
+  test-20: literal - literal - #{litlp}_rschema;
+  test-21: literal-"quoted"-"quoted";
+  test-22: literal -"quoted" -"quoted";
+  test-23: literal- "quoted"- "quoted";
+  test-24: literal - "quoted" - "quoted";
+  test-25: literal-"quoted"-#{interpolant};
+  test-26: literal -"quoted" -#{interpolant};
+  test-27: literal- "quoted"- #{interpolant};
+  test-28: literal - "quoted" - #{interpolant};
+  test-29: literal-"quoted"-lschema_#{ritlp};
+  test-30: literal -"quoted" -lschema_#{ritlp};
+  test-31: literal- "quoted"- lschema_#{ritlp};
+  test-32: literal - "quoted" - lschema_#{ritlp};
+  test-33: literal-"quoted"-#{litlp}_rschema;
+  test-34: literal -"quoted" -#{litlp}_rschema;
+  test-35: literal- "quoted"- #{litlp}_rschema;
+  test-36: literal - "quoted" - #{litlp}_rschema;
+  test-37: literal-#{interpolant}-#{interpolant};
+  test-38: literal -#{interpolant} -#{interpolant};
+  test-39: literal- #{interpolant}- #{interpolant};
+  test-40: literal - #{interpolant} - #{interpolant};
+  test-41: literal-#{interpolant}-lschema_#{ritlp};
+  test-42: literal -#{interpolant} -lschema_#{ritlp};
+  test-43: literal- #{interpolant}- lschema_#{ritlp};
+  test-44: literal - #{interpolant} - lschema_#{ritlp};
+  test-45: literal-#{interpolant}-#{litlp}_rschema;
+  test-46: literal -#{interpolant} -#{litlp}_rschema;
+  test-47: literal- #{interpolant}- #{litlp}_rschema;
+  test-48: literal - #{interpolant} - #{litlp}_rschema;
+  test-49: literal-lschema_#{ritlp}-lschema_#{ritlp};
+  test-50: literal -lschema_#{ritlp} -lschema_#{ritlp};
+  test-51: literal- lschema_#{ritlp}- lschema_#{ritlp};
+  test-52: literal - lschema_#{ritlp} - lschema_#{ritlp};
+  test-53: literal-lschema_#{ritlp}-#{litlp}_rschema;
+  test-54: literal -lschema_#{ritlp} -#{litlp}_rschema;
+  test-55: literal- lschema_#{ritlp}- #{litlp}_rschema;
+  test-56: literal - lschema_#{ritlp} - #{litlp}_rschema;
+  test-57: literal-#{litlp}_rschema-#{litlp}_rschema;
+  test-58: literal -#{litlp}_rschema -#{litlp}_rschema;
+  test-59: literal- #{litlp}_rschema- #{litlp}_rschema;
+  test-60: literal - #{litlp}_rschema - #{litlp}_rschema;
+  test-61: "quoted"-"quoted"-"quoted";
+  test-62: "quoted" -"quoted" -"quoted";
+  test-63: "quoted"- "quoted"- "quoted";
+  test-64: "quoted" - "quoted" - "quoted";
+  test-65: "quoted"-"quoted"-#{interpolant};
+  test-66: "quoted" -"quoted" -#{interpolant};
+  test-67: "quoted"- "quoted"- #{interpolant};
+  test-68: "quoted" - "quoted" - #{interpolant};
+  test-69: "quoted"-"quoted"-lschema_#{ritlp};
+  test-70: "quoted" -"quoted" -lschema_#{ritlp};
+  test-71: "quoted"- "quoted"- lschema_#{ritlp};
+  test-72: "quoted" - "quoted" - lschema_#{ritlp};
+  test-73: "quoted"-"quoted"-#{litlp}_rschema;
+  test-74: "quoted" -"quoted" -#{litlp}_rschema;
+  test-75: "quoted"- "quoted"- #{litlp}_rschema;
+  test-76: "quoted" - "quoted" - #{litlp}_rschema;
+  test-77: "quoted"-#{interpolant}-#{interpolant};
+  test-78: "quoted" -#{interpolant} -#{interpolant};
+  test-79: "quoted"- #{interpolant}- #{interpolant};
+  test-80: "quoted" - #{interpolant} - #{interpolant};
+  test-81: "quoted"-#{interpolant}-lschema_#{ritlp};
+  test-82: "quoted" -#{interpolant} -lschema_#{ritlp};
+  test-83: "quoted"- #{interpolant}- lschema_#{ritlp};
+  test-84: "quoted" - #{interpolant} - lschema_#{ritlp};
+  test-85: "quoted"-#{interpolant}-#{litlp}_rschema;
+  test-86: "quoted" -#{interpolant} -#{litlp}_rschema;
+  test-87: "quoted"- #{interpolant}- #{litlp}_rschema;
+  test-88: "quoted" - #{interpolant} - #{litlp}_rschema;
+  test-89: "quoted"-lschema_#{ritlp}-lschema_#{ritlp};
+  test-90: "quoted" -lschema_#{ritlp} -lschema_#{ritlp};
+  test-91: "quoted"- lschema_#{ritlp}- lschema_#{ritlp};
+  test-92: "quoted" - lschema_#{ritlp} - lschema_#{ritlp};
+  test-93: "quoted"-lschema_#{ritlp}-#{litlp}_rschema;
+  test-94: "quoted" -lschema_#{ritlp} -#{litlp}_rschema;
+  test-95: "quoted"- lschema_#{ritlp}- #{litlp}_rschema;
+  test-96: "quoted" - lschema_#{ritlp} - #{litlp}_rschema;
+  test-97: "quoted"-#{litlp}_rschema-#{litlp}_rschema;
+  test-98: "quoted" -#{litlp}_rschema -#{litlp}_rschema;
+  test-99: "quoted"- #{litlp}_rschema- #{litlp}_rschema;
+  test-100: "quoted" - #{litlp}_rschema - #{litlp}_rschema;
+  test-101: #{interpolant}-#{interpolant}-#{interpolant};
+  test-102: #{interpolant} -#{interpolant} -#{interpolant};
+  test-103: #{interpolant}- #{interpolant}- #{interpolant};
+  test-104: #{interpolant} - #{interpolant} - #{interpolant};
+  test-105: #{interpolant}-#{interpolant}-lschema_#{ritlp};
+  test-106: #{interpolant} -#{interpolant} -lschema_#{ritlp};
+  test-107: #{interpolant}- #{interpolant}- lschema_#{ritlp};
+  test-108: #{interpolant} - #{interpolant} - lschema_#{ritlp};
+  test-109: #{interpolant}-#{interpolant}-#{litlp}_rschema;
+  test-110: #{interpolant} -#{interpolant} -#{litlp}_rschema;
+  test-111: #{interpolant}- #{interpolant}- #{litlp}_rschema;
+  test-112: #{interpolant} - #{interpolant} - #{litlp}_rschema;
+  test-113: #{interpolant}-lschema_#{ritlp}-lschema_#{ritlp};
+  test-114: #{interpolant} -lschema_#{ritlp} -lschema_#{ritlp};
+  test-115: #{interpolant}- lschema_#{ritlp}- lschema_#{ritlp};
+  test-116: #{interpolant} - lschema_#{ritlp} - lschema_#{ritlp};
+  test-117: #{interpolant}-lschema_#{ritlp}-#{litlp}_rschema;
+  test-118: #{interpolant} -lschema_#{ritlp} -#{litlp}_rschema;
+  test-119: #{interpolant}- lschema_#{ritlp}- #{litlp}_rschema;
+  test-120: #{interpolant} - lschema_#{ritlp} - #{litlp}_rschema;
+  test-121: #{interpolant}-#{litlp}_rschema-#{litlp}_rschema;
+  test-122: #{interpolant} -#{litlp}_rschema -#{litlp}_rschema;
+  test-123: #{interpolant}- #{litlp}_rschema- #{litlp}_rschema;
+  test-124: #{interpolant} - #{litlp}_rschema - #{litlp}_rschema;
+  test-125: lschema_#{ritlp}-lschema_#{ritlp}-lschema_#{ritlp};
+  test-126: lschema_#{ritlp} -lschema_#{ritlp} -lschema_#{ritlp};
+  test-127: lschema_#{ritlp}- lschema_#{ritlp}- lschema_#{ritlp};
+  test-128: lschema_#{ritlp} - lschema_#{ritlp} - lschema_#{ritlp};
+  test-129: lschema_#{ritlp}-lschema_#{ritlp}-#{litlp}_rschema;
+  test-130: lschema_#{ritlp} -lschema_#{ritlp} -#{litlp}_rschema;
+  test-131: lschema_#{ritlp}- lschema_#{ritlp}- #{litlp}_rschema;
+  test-132: lschema_#{ritlp} - lschema_#{ritlp} - #{litlp}_rschema;
+  test-133: lschema_#{ritlp}-#{litlp}_rschema-#{litlp}_rschema;
+  test-134: lschema_#{ritlp} -#{litlp}_rschema -#{litlp}_rschema;
+  test-135: lschema_#{ritlp}- #{litlp}_rschema- #{litlp}_rschema;
+  test-136: lschema_#{ritlp} - #{litlp}_rschema - #{litlp}_rschema;
+  test-137: #{litlp}_rschema-#{litlp}_rschema-#{litlp}_rschema;
+  test-138: #{litlp}_rschema -#{litlp}_rschema -#{litlp}_rschema;
+  test-139: #{litlp}_rschema- #{litlp}_rschema- #{litlp}_rschema;
+  test-140: #{litlp}_rschema - #{litlp}_rschema - #{litlp}_rschema;
+}