title: Why is the Visual Studio 2015/2017/2019 Test Runner not discovering my xUnit v2 tests
body: <p>UPDATE: Adding a 2019; the discovery/runner integration mechanism is same as per 2017 &amp; 2015, so the key things that can go wrong are the same.</p>
  
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  <p>I've read <a href="https://stackoverflow.com/questions/16214684/why-is-the-xunit-runner-not-finding-my-tests/">Why is the xUnit runner not finding my tests, which covers reasons xUnit would <em>never</em> be able to find your tests</a> but my problem is different - I'm confident there's nothing subtle going on with my tests; (they have worked in other environments, this seems to be just my machine) - the Visual Studio Test Runner in Visual Studio 2015 [Community Edition] is simply not showing <strong>any</strong> of my tests. I'm not doing anything remotely exciting; the tests target xUnit.net v2 on the Desktop.</p>
  
  <p>I've looked in the Output window and am not seeing anything in at all under <strong>Test</strong> in the <strong>Show output from</strong> tabs.</p>