Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /home/kiwakim/stock/vendor/jms/serializer/tests/Twig/SerializerExtensionTest.php:9 Stack trace: #0 {main} thrown in /home/kiwakim/stock/vendor/jms/serializer/tests/Twig/SerializerExtensionTest.php on line 9