title: VS2017 and NUnit 3.9 No test is available
body: <p>I am using the latest VS2017 version 15.6.4, NUnit3TestAdapter 3.10.0 and Nunit version 3.9.0.0. </p>
  
  <p>When I try to run a unit test in Test Explorer the test are grayed out, when I right click and and run selected tests I see the following error: <strong>No test is available</strong>
  Here is how my test class looks</p>
  
  <pre><code>    [TestFixture]
      public partial class ListViewBOTest
      {
      [Test]
       public void TestSearch_DateTime()
        {
          Assert.AreEqual(1,0);
        }
  
      }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/MVaQb.png" rel="noreferrer"><img src="https://i.stack.imgur.com/MVaQb.png" alt="Here is a screenshot of my tests"></a></p>
  
  <p><strong>Text from output:</strong></p>
  
  <pre><code>[3/26/2018 10:53:55 AM Informational] ------ Run test started ------
  [3/26/2018 10:53:55 AM Informational] NUnit Adapter 3.10.0.21: Test execution started
  [3/26/2018 10:53:55 AM Informational] Running all tests in C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll
  [3/26/2018 10:53:56 AM Informational] NUnit failed to load C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll
  [3/26/2018 10:53:56 AM Informational] NUnit Adapter 3.10.0.21: Test execution complete
  [3/26/2018 10:53:56 AM Warning] No test is available in C:\Projects\MVPPlant\DEV\CMMSdg.Plant\CMMSdg.Plant\Sln.2010\CMMSdg.Plant.BusinessObjects.Test\bin\Debug\CMMSdg.Plant.BusinessObjects.Test.dll. Make sure that test discoverer &amp; executors are registered and platform &amp; framework version settings are appropriate and try again.
  [3/26/2018 10:53:56 AM Informational] ========== Run test finished: 0 run (0:00:01.0435303) ==========
  </code></pre>