Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\Training\vendor\symfony\http-kernel\Tests\Fragment\RoutableFragmentRendererTest.php:18 Stack trace: #0 {main} thrown in D:\Application\www\Training\vendor\symfony\http-kernel\Tests\Fragment\RoutableFragmentRendererTest.php on line 18