Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/rosengar/Lib/composerRosengartPHP8/vendor/bryanjhv/slim-session/tests/HelperTest.php:8 Stack trace: #0 {main} thrown in /home/rosengar/Lib/composerRosengartPHP8/vendor/bryanjhv/slim-session/tests/HelperTest.php on line 8