Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp7\htdocs\edgpens\vendor\squizlabs\php_codesniffer\tests\Standards\AbstractSniffUnitTest.php:23 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\vendor\squizlabs\php_codesniffer\tests\Standards\AbstractSniffUnitTest.php on line 23