title: Running NUnit/SpecFlow tests in TFS2017
body: <p>I'm not sure whether the issue is with NUnit or SpecFlow but whenever I add the 'Run Functional Tests' task to my build, I get the following error when running a build in TFS2017...</p>
  
  <pre><code>2017-05-06T00:11:00.4676774Z ##[warning]DistributedTests: Test discovery started.
  2017-05-06T00:11:00.4676774Z ##[warning]DistributedTests: Test Run Discovery Aborted . Test run id : 5
  2017-05-06T00:11:00.4676774Z ##[warning]DistributedTests: UnExpected error occured during test execution. Try again.
  2017-05-06T00:11:00.4676774Z ##[warning]DistributedTests: Error : NUnit Adapter 3.7.0.0: Test discovery complete
  2017-05-06T00:11:00.4676774Z 
  2017-05-06T00:11:00.4676774Z ##[warning]DistributedTests: Test run aborted. Test run id: 5
  2017-05-06T00:11:00.4676774Z ##[error]System.Exception: The test run was aborted, failing the task.
  2017-05-06T00:11:00.5175379Z ##[error]PowerShell script completed with 1 errors.
  </code></pre>
  
  <p>Does anyone know what the problem is?</p>
  
  <p>Many thanks, </p>