MvvmCross: How to use multiple test classes derived from MvxIoCSupportingTest

I have two xUnit test classes, derived from MvxIoCSupportingTest. Running my unit tests I receive the error message:

Cirrious.CrossCore.Exceptions.MvxException : You should only initialize MvxBindingSingletonCache once

Is there a way to explicitly instatiate the IoC not as signleton?