Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\pagina\laravel_backend_app\vendor\symfony\var-dumper\Tests\Command\Descriptor\HtmlDescriptorTest.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\pagina\laravel_backend_app\vendor\symfony\var-dumper\Tests\Command\Descriptor\HtmlDescriptorTest.php on line 21