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