Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-composer-installers/tests/Plugin/Util/ExtensionKeyResolverTest.php:25 Stack trace: #0 {main} thrown in /home/cmsshareacopy/public_html/TYPO3/vendor/typo3/cms-composer-installers/tests/Plugin/Util/ExtensionKeyResolverTest.php on line 25