Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/mulwnet/beta.mulw.net/vendor/coinbase/coinbase-commerce/tests/ApiClientTest.php:7 Stack trace: #0 {main} thrown in /home/mulwnet/beta.mulw.net/vendor/coinbase/coinbase-commerce/tests/ApiClientTest.php on line 7