Testing ActionScript classes with native methods?

Hi,

I have an ActionScript class that I'm writing and would like to test using FlexUnit.

The only issue is that the ActionScript class has a member in it that is a class with native methods.

So, I get the following error when trying to run a test of that ActionScript class:

VerifyError: Error #1079: Native methods are not allowed in loaded code.

Does anyone know of a way to get around this?  FlexUnit seems not to like native methods being present.

Thanks,

Matt