Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\print-bk\vendor\laravel\framework\src\Illuminate\Foundation\Testing\TestCase.php:12 Stack trace: #0 {main} thrown in C:\xampp\htdocs\print-bk\vendor\laravel\framework\src\Illuminate\Foundation\Testing\TestCase.php on line 12