Fatal error: Uncaught Error: Class "Illuminate\Tests\Integration\Queue\QueueTestCase" not found in C:\xampp\htdocs\vendor\laravel\framework\tests\Integration\Queue\JobChainingTest.php:19 Stack trace: #0 {main} thrown in C:\xampp\htdocs\vendor\laravel\framework\tests\Integration\Queue\JobChainingTest.php on line 19