Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in C:\Apache24\htdocs\Quantum\vendor\squizlabs\php_codesniffer\tests\Core\Fixer\GenerateDiffTest.php:26 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\Quantum\vendor\squizlabs\php_codesniffer\tests\Core\Fixer\GenerateDiffTest.php on line 26