Commented Issue: MSTest broken with lastest NuGet 2.4 and 2.5 builds [3200]

I get the following error when NuGet Tools 2.5 Beta, the 2.5 nightly build or current 2.4 are installed:

------ Discover test started ------
Error: Missing method 'instance string [Microsoft.VisualStudio.TestWindow.Core] NuGet.VisualStudio.IVsPackageMetadata::get_InstallPath()' from class 'NuGet.VisualStudio.VsPackageMetadata'.
========== Discover test finished: 70 found (0:00:02.4115856) ==========

I've tried this with both VS 2012 Premium RTM Update 1 and Update 2 CTP 4. I have also seen various forum posts confirming other people experience this problem.

The impact is you can no longer run tests, but can still debug them (so there is a workaround).

The error message suggests the NuGet Visual Studio extension has not implemented a required "InstallPath" property.
Comments: I've recreated the sample as follows... (first the screenshot)...