Setup PHP_CodeSniffer in phpStorm The package - PHP_CodeSniffer CodeSniffer load coding standards from file phpcs.xml In the Settings/Preferences, navigate to PHP | Quality Tools. On the Quality Tools page that opens, expand the PHP_CodeSniffer area and click the Browse button next to the Configuration list. In the PHP_CodeSniffer dialog that opens, empty the PHP_CodeSniffer path field. Result