Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/itcarrot/public_html/api.itcarrot.com/vendor/ratchet/rfc6455/tests/unit/Messaging/MessageTest.php:12 Stack trace: #0 {main} thrown in /home/itcarrot/public_html/api.itcarrot.com/vendor/ratchet/rfc6455/tests/unit/Messaging/MessageTest.php on line 12