Fatal error: Uncaught Error: Class 'PHPUnit_Framework_TestCase' not found in /home/app/htdocs/ninja/vendor/gocardless/gocardless-pro/tests/Integration/IntegrationTestBase.php:12 Stack trace: #0 {main} thrown in /home/app/htdocs/ninja/vendor/gocardless/gocardless-pro/tests/Integration/IntegrationTestBase.php on line 12