Silverlight Toolkit has several NuGet packages (Core, Input, Theming, etc.). Unfortunately, Unit Testing Framework, which comes as a part of downloadable toolkit version, was not available for the fellow NuGet users. Until now. You can easily install it by typing ‘Install-Package SilverlightToolkit-Testing’ in the Package Manager console. Details here. The package just adds references to Microsoft.Silverlight.Testing.dll and Microsoft.VisualStudio.QualityTools.UnitTesting.Silverlight.dll assemblies, so that you don’t have to install toolkit or bloat your VCS with unnecessary binaries.