diff --git a/tests/PHPStan/Rules/Properties/TypesAssignedToPropertiesRuleTest.php b/tests/PHPStan/Rules/Properties/TypesAssignedToPropertiesRuleTest.php
index 120d2f65f3..81855aa692 100644
--- a/tests/PHPStan/Rules/Properties/TypesAssignedToPropertiesRuleTest.php
+++ b/tests/PHPStan/Rules/Properties/TypesAssignedToPropertiesRuleTest.php
@@ -514,10 +514,4 @@ public function testBug3311b(): void
 		]);
 	}
 
-	public function testBug7789(): void
-	{
-		$this->checkExplicitMixed = true;
-		$this->analyse([__DIR__ . '/data/bug-7789.php'], []);
-	}
-
 }
diff --git a/tests/PHPStan/Rules/Properties/data/bug-7789.php b/tests/PHPStan/Rules/Properties/data/bug-7789.php
deleted file mode 100644
index 6fdf12b477..0000000000
--- a/tests/PHPStan/Rules/Properties/data/bug-7789.php
+++ /dev/null
@@ -1,14 +0,0 @@
-<?php
-
-namespace Bug7789;
-
-class HelloWorld
-{
-	/** @var '"'|'\'' */
-	public static $u;
-}
-
-function (): void {
-	HelloWorld::$u = '"';
-	HelloWorld::$u = '\'';
-};