Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/nusevaghici/public_html/demo/vendor/sebastian/comparator/tests/DOMNodeComparatorTest.php:23 Stack trace: #0 {main} thrown in /home/nusevaghici/public_html/demo/vendor/sebastian/comparator/tests/DOMNodeComparatorTest.php on line 23