Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/clienti2020/public_html/novaballet.it/vendor/sebastian/diff/tests/Utils/UnifiedDiffAssertTraitTest.php:18 Stack trace: #0 {main} thrown in /home/clienti2020/public_html/novaballet.it/vendor/sebastian/diff/tests/Utils/UnifiedDiffAssertTraitTest.php on line 18