Unit testing in Universal App

I create new Universal App project, structure of the solution on screenshot.

After I add Unit Test App project for Windows Phone.

And see Could not find SDK "MSTestFramework, Version=14.0"

I'm use Visual Studio 2015 CTP

Microsoft Visual Studio Ultimate 2015 CTP
Version 14.0.22512.0 DP
Microsoft .NET Framework
Version 4.6.00007

How to solve the problem?