Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /var/www/html/mun/vendor/cboden/ratchet/tests/unit/Server/IoServerTest.php:11 Stack trace: #0 {main} thrown in /var/www/html/mun/vendor/cboden/ratchet/tests/unit/Server/IoServerTest.php on line 11