Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\xampp\htdocs\BK\bateriasec\vendor\sebastian\diff\tests\Utils\UnifiedDiffAssertTraitIntegrationTest.php:21 Stack trace: #0 {main} thrown in C:\xampp\htdocs\BK\bateriasec\vendor\sebastian\diff\tests\Utils\UnifiedDiffAssertTraitIntegrationTest.php on line 21