jQuery Validate does not work on custom radio buttons

I use jQuery Validate plugin for a form. By now I have not succeeded in validating my custom radio buttons. I have read many posts on how to solve this problem, for example using ignore, but this has not helped. Here comes my little code: HTML <form id="my-form" name="my-form" method="post"> <input type="text" name="myText"> <p></p> <input type="radio" id="my-radio-1" name="myRadio"> <label for="my-radio-1">selection #1</label> <input type="radio" id="my-radio-2" name="myRadio"> <label for="my-radio-2">selection #2</label> <p></p> <p> <input type="submit" id="my-submit"> </p> </form> JS $('#my-form').validate({ rules: { myText: { required: true }, myRadio: { required: true } }, errorClass: 'error_validate', errorPlacement: function (label, element) { label.insertAfter(element); } }); JSFIDDLE with CSS: https://jsfiddle.net/d0nf4pqf/ Anybody knows how to enable validation for the radio buttons?