title: Run tests after build not showing in test explorer
body: <p>According to <a href="https://msdn.microsoft.com/en-us/library/hh270865.aspx" rel="noreferrer">this Microsoft article on VS2015</a> there should be a "Run tests after every build" option in the test explorer. There is not. Any idea how to enable it?</p>
  
  <p><a href="https://i.stack.imgur.com/NvDWi.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NvDWi.png" alt="vs 2015 test explorer"></a></p>
  
  <p>I am running VS2015 Update 2, but perhaps there are some additional settings I need to enable?</p>