Column 'TestType' does not belong to table test.

I got this cryptic error when running a unit test project for my OneNote to Silverlight converter add-in demo that I am building in Visual Studio 2005.  I searched for the error message using Live Search.

I found that by adding     <OutputPath>.binRelease</OutputPath> to the first <PropertyGroup> in the Tester .csproj file and restarting Visual Studio, the problem went away.