Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in C:\xampp7\htdocs\edgpens\vendor\yoast\phpunit-polyfills\src\TestCases\XTestCase.php:33 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\vendor\yoast\phpunit-polyfills\src\TestCases\XTestCase.php on line 33