title: Polymer tests never end on windows machines
body: <p>I've developed an application using Polymer 1.0. My developer computer is a Mac, and I've not had any problems during development process.</p>
  
  <p>However, when I clone my application on a Windows machine (Windows 10), the tests don't work at all.</p>
  
  <p>Whenever I execute <code>polymer test</code> or <code>wct</code> the command blocks the terminal and never ends.</p>
  
  <p>On MACOS or Linux it works perfectly.</p>