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