Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\SiramahClone\vendor\laravel\framework\src\Illuminate\Foundation\Testing\TestCase.php:9 Stack trace: #0 {main} thrown in C:\xampp\htdocs\SiramahClone\vendor\laravel\framework\src\Illuminate\Foundation\Testing\TestCase.php on line 9