Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/gingerbrup/rappelapi/vendor/jms/serializer-bundle/Tests/DependencyInjection/JMSSerializerExtensionTest.php:17 Stack trace: #0 {main} thrown in /home/gingerbrup/rappelapi/vendor/jms/serializer-bundle/Tests/DependencyInjection/JMSSerializerExtensionTest.php on line 17