Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp\htdocs\fiveplus\vendor\sebastian\comparator\tests\DOMNodeComparatorTest.php:24 Stack trace: #0 {main} thrown in C:\xampp\htdocs\fiveplus\vendor\sebastian\comparator\tests\DOMNodeComparatorTest.php on line 24