diff --git a/.github/workflows/continuous-integration.yml b/.github/workflows/continuous-integration.yml
index 7992300..3cb573a 100644
--- a/.github/workflows/continuous-integration.yml
+++ b/.github/workflows/continuous-integration.yml
@@ -30,16 +30,16 @@ jobs:
             os: windows-latest
 
     steps:
-      - uses: "actions/checkout@v4"
+      - uses: actions/checkout@v4
 
-      - uses: "shivammathur/setup-php@v2"
+      - uses: shivammathur/setup-php@v2
         with:
-          coverage: "none"
           php-version: "${{ matrix.php-version }}"
+          coverage: none
 
-      - uses: "ramsey/composer-install@v3"
+      - uses: ramsey/composer-install@v3
         with:
           dependency-versions: highest
 
-      - name: "Run tests"
-        run: "vendor/bin/simple-phpunit --verbose"
+      - name: Run tests
+        run: composer test
diff --git a/.github/workflows/phpstan.yml b/.github/workflows/phpstan.yml
index 4c106f6..2ad56fa 100644
--- a/.github/workflows/phpstan.yml
+++ b/.github/workflows/phpstan.yml
@@ -20,19 +20,16 @@ jobs:
           - "8.3"
 
     steps:
-      - uses: "actions/checkout@v4"
+      - uses: actions/checkout@v4
 
-      - uses: "shivammathur/setup-php@v2"
+      - uses: shivammathur/setup-php@v2
         with:
-          coverage: "none"
           php-version: "${{ matrix.php-version }}"
+          coverage: none
 
-      - uses: "ramsey/composer-install@v3"
+      - uses: ramsey/composer-install@v3
         with:
           dependency-versions: highest
 
-      - name: "Initialize PHPUnit sources"
-        run: "vendor/bin/simple-phpunit --filter NO_TEST_JUST_AUTOLOAD_THANKS"
-
-      - name: "Run PHPStan"
-        run: "composer phpstan"
+      - name: Run PHPStan
+        run: composer phpstan
diff --git a/composer.json b/composer.json
index 59aa759..701ec9e 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "composer/pcre": "^2.1 || ^3.1"
     },
     "require-dev": {
-        "symfony/phpunit-bridge": "^5",
+        "phpunit/phpunit": "^8",
         "phpstan/phpstan": "^1.6",
         "phpstan/phpstan-deprecation-rules": "^1",
         "phpstan/phpstan-strict-rules": "^1.1",
@@ -42,7 +42,7 @@
         }
     },
     "scripts": {
-        "test": "SYMFONY_PHPUNIT_REMOVE_RETURN_TYPEHINT=1 vendor/bin/simple-phpunit",
+        "test": "vendor/bin/phpunit",
         "phpstan": "phpstan analyse"
     }
 }
diff --git a/phpstan.neon.dist b/phpstan.neon.dist
index 53a9a6b..530eed0 100644
--- a/phpstan.neon.dist
+++ b/phpstan.neon.dist
@@ -14,8 +14,5 @@ parameters:
     reportUnmatchedIgnoredErrors: false
     treatPhpDocTypesAsCertain: false
 
-    bootstrapFiles:
-        - tests/phpstan-locate-phpunit-autoloader.php
-
     excludePaths:
        - 'tests/Fixtures/*'
diff --git a/tests/phpstan-locate-phpunit-autoloader.php b/tests/phpstan-locate-phpunit-autoloader.php
deleted file mode 100644
index a9e670c..0000000
--- a/tests/phpstan-locate-phpunit-autoloader.php
+++ /dev/null
@@ -1,22 +0,0 @@
-<?php
-
-$bestDirFound = null;
-$dirs = (array) glob(__DIR__.'/../vendor/bin/.phpunit/phpunit-*', GLOB_ONLYDIR);
-natsort($dirs);
-
-foreach (array_reverse($dirs) as $dir) {
-    $bestDirFound = $dir;
-    if (PHP_VERSION_ID >= 80000 && false !== strpos((string) $dir, 'phpunit-9')) {
-        break;
-    }
-    if (PHP_VERSION_ID < 80000 && false !== strpos((string) $dir, 'phpunit-8')) {
-        break;
-    }
-}
-
-if (null === $bestDirFound) {
-    echo 'Run "composer test" to initialize PHPUnit sources before running PHPStan'.PHP_EOL;
-    exit(1);
-}
-
-include $bestDirFound.'/vendor/autoload.php';