Created Unassigned: Open Generic types won't register in the catalog on Test Project [14616]

Hi folks, I'm facing the same problem described at http://stackoverflow.com/questions/18147371/open-generic-types-wont-register-in-the-catalog/22114304#22114304.

I use a Library that use MEF. This library is working fine when I use it on Console/Web applications but the catalog doesn't load data when is inside Test project.

Can you guys give me a clue to fix this?

Thanks in advance !!