Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/mpolsk5/public_html/vuturkeybowl.com/vendor/sebastian/diff/tests/DifferTestTest.php:18 Stack trace: #0 {main} thrown in /home/mpolsk5/public_html/vuturkeybowl.com/vendor/sebastian/diff/tests/DifferTestTest.php on line 18