Use PyCham with Nose of Yeti

We're using nose of yeti to write tests, but unfortunately PyCharm doesn't like the syntax.

Nose of Yeti: https://github.com/delfick/nose-of-yeti
Nose of yeti examples: https://github.com/delfick/nose-of-yeti/blob/master/example/comparison.py

What's the best way to get this working?

Thanks