title: Error: You need to include some adapter that implements __karma__.start method
body: <p>I'm trying to add some unit tests to one of my projects.</p>
  
  <p>So far I've installed and configured karma, and have installed jasmine. I've one test file in my <code>test/</code> folder.</p>
  
  <p>The karma server has started, the browser page is ready, but <code>karma run</code> fails as follows:</p>
  
  <pre><code>$ karma run karma-conf.js 
  [2014-06-14 15:19:11.046] [DEBUG] config - Loading config /foo/test/karma-conf.js
  Waiting for previous execution...
  Chrome 35.0.1916 (Linux) ERROR
    You need to include some adapter that implements __karma__.start method!
  </code></pre>
  
  <p>This error message doesn't Google well.</p>
  
  <p>Is this something obvious, or do I need to provide more information?</p>