Fatal error: Uncaught Error: Class "Tests\TestCase" not found in /home/wisecodex/public_html/booklio.wisecodex.com/tests/Feature/AppointmentEngineTest.php:19 Stack trace: #0 {main} thrown in /home/wisecodex/public_html/booklio.wisecodex.com/tests/Feature/AppointmentEngineTest.php on line 19