Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/devgrafix/public_html/roomadmin/vendor/sebastian/diff/tests/Utils/UnifiedDiffAssertTraitIntegrationTest.php:21 Stack trace: #0 {main} thrown in /home/devgrafix/public_html/roomadmin/vendor/sebastian/diff/tests/Utils/UnifiedDiffAssertTraitIntegrationTest.php on line 21