Fatal error: Uncaught Error: Class "Tests\TestCase" not found in C:\xampp\htdocs\snipe-it\tests\Feature\Checkouts\Ui\AssetCheckoutTest.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\snipe-it\tests\Feature\Checkouts\Ui\AssetCheckoutTest.php on line 18