title: How to specify several marks for the pytest command
body: <p>Reading <a href="http://doc.pytest.org/en/latest/example/markers.html" rel="noreferrer">http://doc.pytest.org/en/latest/example/markers.html</a> I see the example of including or excluding certain python tests based on a mark.</p>
  
  <p>Including:</p>
  
  <pre><code>pytest -v -m webtest
  </code></pre>
  
  <p>Excluding:</p>
  
  <pre><code>pytest -v -m "not webtest"
  </code></pre>
  
  <p>What if I would like to specify several marks for both include and exclude?</p>