diff --git a/.github/workflows/vm-test.yml b/.github/workflows/vm-test.yml
index 48c790ce03..16d61c7892 100644
--- a/.github/workflows/vm-test.yml
+++ b/.github/workflows/vm-test.yml
@@ -54,7 +54,7 @@ jobs:
       - run: npm install
         if: steps.cache-node-modules.outputs.cache-hit != 'true'
 
-      - run: npm run test:state:allForks
+      - run: npm run test:state:selectedForks
         env:
           CI: true
 
diff --git a/package.json b/package.json
index afab33106e..807c3e5a74 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,8 @@
     "docs:build": "typedoc lib",
     "test:vm": "node ./tests/tester --vm",
     "test:state": "npm run build:dist && node ./tests/tester --state --dist",
-    "test:state:allForks": "npm run test:state -- --fork=Byzantium && npm run test:state -- --fork=Constantinople && npm run test:state -- --fork=Petersburg && npm run test:state -- --fork=Istanbul",
+    "test:state:allForks": "npm run test:state -- --fork=Byzantium && npm run test:state -- --fork=Constantinople && npm run test:state -- --fork=Petersburg && npm run test:state -- --fork=Istanbul && npm run test:state -- --fork=MuirGlacier",
+    "test:state:selectedForks": "npm run test:state -- --fork=Petersburg && npm run test:state -- --fork=Istanbul && npm run test:state -- --fork=MuirGlacier",
     "test:state:slow": "npm run test:state -- --runSkipped=slow",
     "test:buildIntegrity": "npm run test:state -- --test='stackOverflow'",
     "test:blockchain": "npm run build:dist && node --stack-size=1500 ./tests/tester --blockchain --dist",
diff --git a/tests/BlockchainTestsRunner.js b/tests/BlockchainTestsRunner.js
index 7f388acd1a..5b6047aa7d 100644
--- a/tests/BlockchainTestsRunner.js
+++ b/tests/BlockchainTestsRunner.js
@@ -20,7 +20,7 @@ module.exports = function runBlockchainTest (options, testData, t, cb) {
   }
   var blockchain = new Blockchain({
     db: blockchainDB,
-    hardfork: options.forkConfig.toLowerCase(),
+    hardfork: options.forkConfigVM,
     validate: validate
   })
   if (validate) {
@@ -35,9 +35,9 @@ module.exports = function runBlockchainTest (options, testData, t, cb) {
   var vm = new VM({
     state: state,
     blockchain: blockchain,
-    hardfork: options.forkConfig.toLowerCase()
+    hardfork: options.forkConfigVM
   })
-  var genesisBlock = new Block({ hardfork: options.forkConfig.toLowerCase() })
+  var genesisBlock = new Block({ hardfork: options.forkConfigVM })
 
   testData.homestead = true
   if (testData.homestead) {
@@ -60,7 +60,7 @@ module.exports = function runBlockchainTest (options, testData, t, cb) {
     function (done) {
       // create and add genesis block
       genesisBlock.header = new BlockHeader(formatBlockHeader(testData.genesisBlockHeader), {
-        hardfork: options.forkConfig.toLowerCase()
+        hardfork: options.forkConfigVM
       })
       t.equal(state.root.toString('hex'), genesisBlock.header.stateRoot.toString('hex'), 'correct pre stateRoot')
       if (testData.genesisRLP) {
@@ -74,7 +74,7 @@ module.exports = function runBlockchainTest (options, testData, t, cb) {
       async.eachSeries(testData.blocks, function (raw, cb) {
         try {
           var block = new Block(Buffer.from(raw.rlp.slice(2), 'hex'), {
-            hardfork: options.forkConfig.toLowerCase()
+            hardfork: options.forkConfigVM
           })
           // forces the block into thinking they are homestead
           if (testData.homestead) {
diff --git a/tests/GeneralStateTestsRunner.js b/tests/GeneralStateTestsRunner.js
index ff964327c8..e2a0f0d3e7 100644
--- a/tests/GeneralStateTestsRunner.js
+++ b/tests/GeneralStateTestsRunner.js
@@ -4,12 +4,11 @@ const Trie = require('merkle-patricia-tree/secure')
 const ethUtil = require('ethereumjs-util')
 const Account = require('ethereumjs-account').default
 const BN = ethUtil.BN
-const { getRequiredForkConfigAlias } = require('./util')
 
-function parseTestCases (forkConfig, testData, data, gasLimit, value) {
+function parseTestCases (forkConfigTestSuite, testData, data, gasLimit, value) {
   let testCases = []
-  if (testData['post'][forkConfig]) {
-    testCases = testData['post'][forkConfig].map(testCase => {
+  if (testData['post'][forkConfigTestSuite]) {
+    testCases = testData['post'][forkConfigTestSuite].map(testCase => {
       let testIndexes = testCase['indexes']
       let tx = { ...testData.transaction }
       if (data !== undefined && testIndexes['data'] !== data) {
@@ -57,12 +56,12 @@ function runTestCase (options, testData, t, cb) {
       }
       vm = new VM({
         state: state,
-        hardfork: options.forkConfig.toLowerCase()
+        hardfork: options.forkConfigVM
       })
       testUtil.setupPreConditions(state, testData, done)
     },
     function (done) {
-      var tx = testUtil.makeTx(testData.transaction, options.forkConfig.toLowerCase())
+      var tx = testUtil.makeTx(testData.transaction, options.forkConfigVM)
       block = testUtil.makeBlockFromEnv(testData.env)
       tx._homestead = true
       tx.enableHomestead = true
@@ -146,19 +145,18 @@ function runTestCase (options, testData, t, cb) {
 }
 
 module.exports = function runStateTest (options, testData, t, cb) {
-  const forkConfig = getRequiredForkConfigAlias(options.forkConfig)
   try {
-    const testCases = parseTestCases(forkConfig, testData, options.data, options.gasLimit, options.value)
+    const testCases = parseTestCases(options.forkConfigTestSuite, testData, options.data, options.gasLimit, options.value)
     if (testCases.length > 0) {
       async.eachSeries(testCases,
                       (testCase, done) => runTestCase(options, testCase, t, done),
                       cb)
     } else {
-      t.comment(`No ${forkConfig} post state defined, skip test`)
+      t.comment(`No ${options.forkConfigTestSuite} post state defined, skip test`)
       cb()
     }
   } catch (e) {
-    t.fail('error running test case for fork: ' + forkConfig)
+    t.fail('error running test case for fork: ' + options.forkConfigTestSuite)
     console.log('error:', e)
     cb()
   }
diff --git a/tests/tester.js b/tests/tester.js
index 7e5910f617..13d277592f 100755
--- a/tests/tester.js
+++ b/tests/tester.js
@@ -3,8 +3,11 @@
 const argv = require('minimist')(process.argv.slice(2))
 const tape = require('tape')
 const testing = require('ethereumjs-testing')
-const FORK_CONFIG = argv.fork || 'Istanbul'
 const { getRequiredForkConfigAlias } = require('./util')
+const FORK_CONFIG = (argv.fork || 'Istanbul')
+const FORK_CONFIG_TEST_SUITE = getRequiredForkConfigAlias(FORK_CONFIG)
+// Istanbul -> istanbul, MuirGlacier -> muirGlacier
+const FORK_CONFIG_VM = FORK_CONFIG.charAt(0).toLowerCase() + FORK_CONFIG.substring(1)
 // tests which should be fixed
 const skipBroken = [
   'dynamicAccountOverwriteEmpty', // temporary till fixed (2019-01-30), skipped along constantinopleFix work time constraints
@@ -138,7 +141,7 @@ function runTests(name, runnerArgs, cb) {
   testGetterArgs.skipTests = getSkipTests(argv.skip, argv.runSkipped ? 'NONE' : 'ALL')
   testGetterArgs.runSkipped = getSkipTests(argv.runSkipped, 'NONE')
   testGetterArgs.skipVM = skipVM
-  testGetterArgs.forkConfig = getRequiredForkConfigAlias(FORK_CONFIG)
+  testGetterArgs.forkConfig = FORK_CONFIG_TEST_SUITE
   testGetterArgs.file = argv.file
   testGetterArgs.test = argv.test
   testGetterArgs.dir = argv.dir
@@ -147,7 +150,8 @@ function runTests(name, runnerArgs, cb) {
 
   testGetterArgs.customStateTest = argv.customStateTest
 
-  runnerArgs.forkConfig = FORK_CONFIG
+  runnerArgs.forkConfigVM = FORK_CONFIG_VM
+  runnerArgs.forkConfigTestSuite = FORK_CONFIG_TEST_SUITE
   runnerArgs.jsontrace = argv.jsontrace
   runnerArgs.debug = argv.debug // for BlockchainTests
 
@@ -178,7 +182,7 @@ function runTests(name, runnerArgs, cb) {
       const runner = require(`./${name}Runner.js`)
       // Tests for HFs before Istanbul have been moved under `LegacyTests/Constantinople`:
       // https://github.com/ethereum/tests/releases/tag/v7.0.0-beta.1
-      if (runnerArgs.forkConfig !== 'Istanbul') {
+      if (testGetterArgs.forkConfig !== 'Istanbul') {
         name = 'LegacyTests/Constantinople/'.concat(name)
       }
       testing
diff --git a/tests/util.js b/tests/util.js
index 09ca228a37..b059681ffc 100644
--- a/tests/util.js
+++ b/tests/util.js
@@ -403,6 +403,11 @@ exports.setupPreConditions = function (state, testData, done) {
  * @returns {String} Either an alias of the forkConfig param, or the forkConfig param itself
  */
 exports.getRequiredForkConfigAlias = function (forkConfig) {
+  // Run the Istanbul tests for MuirGlacier since there are no dedicated tests
+  if (String(forkConfig).match(/^muirGlacier/i)) {
+    return 'Istanbul'
+  }
+  // Petersburg is named ConstantinopleFix in the client-independent consensus test suite
   if (String(forkConfig).match(/^petersburg$/i)) {
     return 'ConstantinopleFix'
   }