Fatal error: Uncaught Error: Class 'Orchestra\Testbench\TestCase' not found in C:\xampp\htdocs\rabani-laravel-firebird\vendor\laravel\ui\tests\AuthBackend\AuthenticatesUsersTest.php:14 Stack trace: #0 {main} thrown in C:\xampp\htdocs\rabani-laravel-firebird\vendor\laravel\ui\tests\AuthBackend\AuthenticatesUsersTest.php on line 14