title: Cannot configure tests in Visual Studio Code
body: <p>When running the command "Python: Configure Tests" in Visual Studio Code I get following error:</p>
  
  <pre><code>command "python.configure tests" not found 
  </code></pre>
  
  <p>I uninstalled Python extension for vscode and tried to reinstall it but I get this error now:</p>
  
  <pre><code>Activating extension 'ms-python.python' failed: Expected a string, got undefined.
  </code></pre>