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