Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/mun/vendor/ratchet/rfc6455/tests/unit/Messaging/MessageTest.php:12
Stack trace:
#0 {main}
thrown in /var/www/html/mun/vendor/ratchet/rfc6455/tests/unit/Messaging/MessageTest.php on line 12