Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /home/ondemand/test.ondemandpro.net/vendor/sebastian/diff/tests/DifferTest.php:27 Stack trace: #0 {main} thrown in /home/ondemand/test.ondemandpro.net/vendor/sebastian/diff/tests/DifferTest.php on line 27