Fatal error: Uncaught Error: Class "PHPUnit_Framework_TestCase" not found in /var/www/html/includes/vendor/gocardless/gocardless-pro/tests/ClientTest.php:5 Stack trace: #0 {main} thrown in /var/www/html/includes/vendor/gocardless/gocardless-pro/tests/ClientTest.php on line 5