Unable to cast COM object of type ‘X’ to interface type ‘_X’

I added a new property to my COM class and consequently bumped up its minor version by 1, did some testing with it, and then decided that I wanted to run a clean build.  Now my existing NUnit test cases that use this class are failing with the following message:

Unable to cast COM object of type MyLib.MyClass' to interface type MyLib._MyClass'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{…}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).,

The interesting thing is that everything compiled without a hitch.  Is this  .NET’s version of BadImplementsRefInCompatLib?

Looking that the COM library’s IDL info via oleview.exe , it turned out that the interop assembly was bound to version 1.3 of the COM library, whereas 1.2 was registered on my machine. I regenerated the COM interop assembly for 1.2, and the problem went away.