Fatal error: Uncaught Error: Class "Tests\TestCase" not found in /home/nextgenc/shieldlink.app/inventory/tests/Feature/Notifications/Webhooks/SlackNotificationsUponCheckinTest.php:22 Stack trace: #0 {main} thrown in /home/nextgenc/shieldlink.app/inventory/tests/Feature/Notifications/Webhooks/SlackNotificationsUponCheckinTest.php on line 22