title: "autotest/rails [...] doesn't [...] exist. Aborting"
body: <p>I'm finding that autotest has stopped working...</p>
  
  <pre><code>$ autotest
  loading autotest/rails
  Autotest style autotest/rails doesn't seem to exist. Aborting.
  </code></pre>
  
  <p>According to <a href="http://www.mendable.com/installing-autotest/" rel="noreferrer">this blog post</a>, the common reason for this error is that people don't have the autotest-rails gem installed. However, I definitely have that installed:</p>
  
  <pre><code>autotest-rails (4.1.0)
  ZenTest (4.1.4, 4.1.3, 4.1.1, 4.0.0, 3.11.1, 3.11.0, 3.10.0, 3.9.3, 3.9.2)
  </code></pre>
  
  <p>I haven't installed any new gems today or yesterday, though I might have done a <code>gem update</code> yesterday.</p>
  
  <p>Another issue I saw mentioned was incompatibility with Ruby 1.9, but I'm using MRI Ruby 1.8.6.</p>