Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/kubalos2/public_html/testtestowy/vendor/sebastian/diff/tests/Output/UnifiedDiffOutputBuilderTest.php:23 Stack trace: #0 {main} thrown in /home/kubalos2/public_html/testtestowy/vendor/sebastian/diff/tests/Output/UnifiedDiffOutputBuilderTest.php on line 23