I need help then.
Because of https://github.com/eslint/eslint/blob/master/lib/tests/eslintTester.js#L68 I can't have an empty item.code, right? - so, should I just add the empty string as follow? (tested it against both master and branch, and seems to do the trick)

        { code: "var i = 1;\r\nvar i = 1;\n", args: [1, 10, 4] },
       ""

Am I understanding things correctly here?

Thanks a lot!