Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/event-dispatcher/Tests/ImmutableEventDispatcherTest.php:21 Stack trace: #0 {main} thrown in /home/devypfrfhn/avancement.devyp.fr/vendor-old/symfony/event-dispatcher/Tests/ImmutableEventDispatcherTest.php on line 21