Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /opt/lampp/htdocs/forum/flarum/vendor/franzl/whoops-middleware/tests/WhoopsMiddlewareTest.php:14 Stack trace: #0 {main} thrown in /opt/lampp/htdocs/forum/flarum/vendor/franzl/whoops-middleware/tests/WhoopsMiddlewareTest.php on line 14