Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/ilias/components/ILIAS/BackgroundTasks/tests/Implementation/Tasks/BasicTaskFactoryTest.php:19 Stack trace: #0 {main} thrown in /var/www/html/ilias/components/ILIAS/BackgroundTasks/tests/Implementation/Tasks/BasicTaskFactoryTest.php on line 19