Fatal error: Uncaught Error: Class 'Orchestra\Testbench\TestCase' not found in /home/demoinvfsanz/public_html/vendor/laravel/framework/tests/Integration/Notifications/SendingMailNotificationsTest.php:20 Stack trace: #0 {main} thrown in /home/demoinvfsanz/public_html/vendor/laravel/framework/tests/Integration/Notifications/SendingMailNotificationsTest.php on line 20