Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/opcon/src/dat/lib/vendor/symfony/event-dispatcher/Tests/AbstractEventDispatcherTest.php:18 Stack trace: #0 {main} thrown in /home/opcon/src/dat/lib/vendor/symfony/event-dispatcher/Tests/AbstractEventDispatcherTest.php on line 18