Fatal error: Uncaught Error: Class 'PHPUnit\Framework\TestCase' not found in /home/discovergreece/public_html/vendor/squizlabs/php_codesniffer/tests/Core/AbstractMethodUnitTest.php:18 Stack trace: #0 {main} thrown in /home/discovergreece/public_html/vendor/squizlabs/php_codesniffer/tests/Core/AbstractMethodUnitTest.php on line 18