Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /var/www/html/stz-api/vendor/clue/buzz-react/tests/Message/MessageFactoryTest.php:8 Stack trace: #0 {main} thrown in /var/www/html/stz-api/vendor/clue/buzz-react/tests/Message/MessageFactoryTest.php on line 8