Fatal error: Uncaught Error: Class "Illuminate\Tests\Integration\Database\DatabaseTestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\laravel\framework\tests\Integration\Database\EloquentMorphCountLazyEagerLoadingTest.php:10 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\laravel\framework\tests\Integration\Database\EloquentMorphCountLazyEagerLoadingTest.php on line 10