title: tox could not find executable 'rmdir'
body: <p>I am trying to create a <code>tox.ini</code> file that runs my tests, clears previous coverages, and creates a coverage. I want to delete the previous <code>htmlcov</code> folder, by <code>rmdir /S /Q htmlcov</code>.</p>
  
  <p>The error I get is: <code>ERROR: InvocationError for command could not find executable 'rmdir'</code>, however, the command works in the command line. </p>
  
  <p>Can someone explain why?</p>
  
  <p>Here is my <code>tox.ini</code> file:</p>
  
  <pre><code>[tox]
  envlist = py35
  
  
  [testenv]
  deps = pytest
         coverage
  
  commands = pytest
             coverage erase
             rmdir /S /Q htmlcov
             coverage run --branch __main__.py test
             coverage report --omit='.tox/*,venv/*,tests/'
             coverage html --omit='.tox/*,venv/*,tests/'
  </code></pre>