Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\E-Tracking\vendor\sebastian\comparator\tests\SplObjectStorageComparatorTest.php:23 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\sebastian\comparator\tests\SplObjectStorageComparatorTest.php on line 23