Fatal error: Uncaught Error: Class 'Tests\TestCase' not found in /home/nextgenc/shieldlink.app/inventory/tests/Feature/Checkouts/Ui/ConsumableCheckoutTest.php:16 Stack trace: #0 {main} thrown in /home/nextgenc/shieldlink.app/inventory/tests/Feature/Checkouts/Ui/ConsumableCheckoutTest.php on line 16