diff --git a/Build/phpunit/UnitTestsBootstrap.php b/Build/phpunit/UnitTestsBootstrap.php
index 9957507b..5760477e 100644
--- a/Build/phpunit/UnitTestsBootstrap.php
+++ b/Build/phpunit/UnitTestsBootstrap.php
@@ -13,9 +13,11 @@
  * The TYPO3 project - inspiring people to share!
  */
 
-use TYPO3\CMS\Core\Information\Typo3Version;
-
-call_user_func(function () {
+/**
+ * This file is defined in UnitTests.xml and called by phpunit
+ * before instantiating the test suites.
+ */
+(static function () {
     $testbase = new \TYPO3\TestingFramework\Core\Testbase();
 
     // These if's are for core testing (package typo3/cms) only. cms-composer-installer does
@@ -52,24 +54,15 @@
 
     $cache = new \TYPO3\CMS\Core\Cache\Frontend\PhpFrontend(
         'core',
-        new \TYPO3\CMS\Core\Cache\Backend\NullBackend('production', [])
+        new \TYPO3\CMS\Core\Cache\Backend\NullBackend([])
     );
     // Set all packages to active
-    if (version_compare((new Typo3Version())->getVersion(), '11.3.0', '>')) {
-        $packageManager = \TYPO3\CMS\Core\Core\Bootstrap::createPackageManager(
-            \TYPO3\CMS\Core\Package\UnitTestPackageManager::class,
-            \TYPO3\CMS\Core\Core\Bootstrap::createPackageCache($cache)
-        );
-    } else {
-        $packageManager = \TYPO3\CMS\Core\Core\Bootstrap::createPackageManager(
-            \TYPO3\CMS\Core\Package\UnitTestPackageManager::class,
-            $cache
-        );
-    }
+    $packageManager = \TYPO3\CMS\Core\Core\Bootstrap::createPackageManager(\TYPO3\CMS\Core\Package\UnitTestPackageManager::class, \TYPO3\CMS\Core\Core\Bootstrap::createPackageCache($cache));
+
     \TYPO3\CMS\Core\Utility\GeneralUtility::setSingletonInstance(\TYPO3\CMS\Core\Package\PackageManager::class, $packageManager);
     \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::setPackageManager($packageManager);
 
     $testbase->dumpClassLoadingInformation();
 
     \TYPO3\CMS\Core\Utility\GeneralUtility::purgeInstances();
-});
+})();