Fatal error: Uncaught Error: Class "Tests\TestCase" not found in C:\xampp\htdocs\kotsch.tech\kotsch-tech - Kopie (2)\tests\Feature\ShopNotificationApiTest.php:16 Stack trace: #0 {main} thrown in C:\xampp\htdocs\kotsch.tech\kotsch-tech - Kopie (2)\tests\Feature\ShopNotificationApiTest.php on line 16