Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/startmine/api.startmine.info/vendor/imdhemy/google-play-billing/tests/TestCase.php:8 Stack trace: #0 {main} thrown in /home/startmine/api.startmine.info/vendor/imdhemy/google-play-billing/tests/TestCase.php on line 8