title: Rails 3 - How can I get rid of "test.host"?
body: <p>I recently installed a plugin called <a href="https://github.com/lassebunk/gretel" rel="nofollow" title="Gretel">Gretel</a> to take care of breadcrumbs for me. It seems to be working great, except that it appears to be breaking some of my specs with the following error:</p>
  
  <pre><code> Failure/Error: response.should redirect_to @course
   Expected response to be a redirect to &lt;/courses/904&gt; but was a redirect to
   &lt;http://test.host/courses/904&gt;
  </code></pre>
  
  <p><strong>What can I do to get rid of this error?</strong> The path seems totally correct, with the exception of that pesky test.host thing.</p>