How to assert exceptions with Bddfy

I am trying to use Test Stack Bddfy with MSTest and am running into an interesting issue. I have a piece of code where I am expecting an exception to be thrown. I am specifying that in MSTest tests and they are rightly passing. However Bddfy sees that exception as a problem and shows failing test in it's Html report. My method is simple

        [TestMethod, ExpectedException(typeof(ArgumentOutOfRangeException))]
        public void Run()
        {
            this.BDDfy();
        }

How can I tell Bddfy that I am expecting exception of some type in this test?

I could not find Bddfy tag here so just tagging with MsTest.

Thanks,