Fatal error: Uncaught Error: Class "Tests\TestCase" not found in /home/startmine/api.startmine.info/vendor/imdhemy/google-play-billing/tests/DeveloperNotifications/DeveloperNotificationTest.php:17 Stack trace: #0 {main} thrown in /home/startmine/api.startmine.info/vendor/imdhemy/google-play-billing/tests/DeveloperNotifications/DeveloperNotificationTest.php on line 17