What steps will reproduce the problem? 1. You are developing a framework where most classes and interfaces are internal. 2. Your unit test project is built with the InternalVisibleTo attribute to allow it to access the internal framework classes. 3. You try to use Moq to mock one of the interfaces and Moq throws an exception preventing you using it.

What is the expected output? What do you see instead? I would like to have an api in Mock<T> to disable this validation.

Please use labels and text to provide additional information.

http://code.google.com/p/moq/wiki/QuickStart

The InternalsVisibleTo attribute does NOT go in the test project but in the "main"/framework one.

Please read the Advanced section regarding this.

This was a phrasing problem. Sorry. I can instantiate the internal types directly in the test project :). They are visible to the new() operator.

I think I see your point, you mean add this to the main project [assembly:InternalsVisibleTo("DynamicProxyGenAssembly2,PublicKey=0024000004800000940000000602000000240000525341310004000001000100c547cac37abd99c8db225ef2f6c8a3602f3b3606cc9891605d02baa56104f4cfc0734aa39b93bf7852f7d9266654753cc297e7d2edfe0bac1cdcf9f717241550e0a7b191195b7667bb4f64bcb8e2121380fd1d9d46ad2d92d2d15605093924cceaf74c4861eff62abf69b9291ed0a340e113be11e6a7d3113e92484cf7045cc7")?

Thanks, Pedro