Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/clapsabo/test/vendor/symfony/security/Http/Tests/Firewall/ChannelListenerTest.php:18 Stack trace: #0 {main} thrown in /home/clapsabo/test/vendor/symfony/security/Http/Tests/Firewall/ChannelListenerTest.php on line 18