Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /var/www/html/stz-api/vendor/cboden/ratchet/tests/unit/Server/EchoServerTest.php:5 Stack trace: #0 {main} thrown in /var/www/html/stz-api/vendor/cboden/ratchet/tests/unit/Server/EchoServerTest.php on line 5