Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/itscm/dev.its.cm/apps/vendor/symfony/event-dispatcher/Tests/ImmutableEventDispatcherTest.php:22 Stack trace: #0 {main} thrown in /home/itscm/dev.its.cm/apps/vendor/symfony/event-dispatcher/Tests/ImmutableEventDispatcherTest.php on line 22