Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/bucereo/my_project_name/vendor/symfony/swiftmailer-bundle/Tests/DependencyInjection/SwiftmailerTransportFactoryTest.php:17 Stack trace: #0 {main} thrown in /home/bucereo/my_project_name/vendor/symfony/swiftmailer-bundle/Tests/DependencyInjection/SwiftmailerTransportFactoryTest.php on line 17