title: Windows 8 App in Visual Studio 2012 - NUnit Test Adapter sees unit tests but does not run them
body: <p>I have a Windows 8 Store App with two projects within the solution - one project exclusively for tests. I have added NUnit and NUnit Test Adapter (<a href="https://www.nuget.org/packages/NUnitTestAdapter/1.0.0" rel="nofollow noreferrer">https://www.nuget.org/packages/NUnitTestAdapter/1.0.0</a>) for this through nuget.</p>
  
  <p><img src="https://i.stack.imgur.com/DFy1m.png" alt="Tests Detected"></p>
  
  <p>My tests are detected - but I cannot run or debug them. Looking at the test output window, I get the following error:</p>
  
  <h1>Could not find test executor with URI 'executor://nunittestexecutor/'.  Make sure that the test executor is installed and supports .net runtime version 4.0.30319.34003.</h1>
  
  <p>I am not using resharper and I am using Visual Studio Professional 2012 Update 3 on Windows 8.1. References for the test project are as follows:</p>
  
  <p><img src="https://i.stack.imgur.com/fB9E1.png" alt="Test project references"></p>