Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\web\slim\test1\src\vendor\nikic\fast-route\test\Dispatcher\DispatcherTest.php:8 Stack trace: #0 {main} thrown in C:\xampp\htdocs\web\slim\test1\src\vendor\nikic\fast-route\test\Dispatcher\DispatcherTest.php on line 8