Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Application\www\E-Tracking\vendor\sebastian\diff\tests\Output\Integration\UnifiedDiffOutputBuilderIntegrationTest.php:25 Stack trace: #0 {main} thrown in D:\Application\www\E-Tracking\vendor\sebastian\diff\tests\Output\Integration\UnifiedDiffOutputBuilderIntegrationTest.php on line 25