Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in /var/www/html/realmaps/vendor/squizlabs/php_codesniffer/tests/Core/Util/Common/EscapeshellcmdTest.php:21 Stack trace: #0 {main} thrown in /var/www/html/realmaps/vendor/squizlabs/php_codesniffer/tests/Core/Util/Common/EscapeshellcmdTest.php on line 21