Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/ilias/components/ILIAS/Refinery/tests/String/LevenshteinTest.php:28 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/Refinery/tests/String/LevenshteinTest.php on line 28