title: Got test error when i tried to do a pull request
body: <p>I tried to do a pull request to a repo. The document who i edit in was in html.
  But i got the messaged "The Travis build failed" and i check the Travis CI report, and this is the report error:</p>
  
  <pre><code>$ rake
  rake aborted!
  No Rakefile found (looking for: rakefile, Rakefile, rakefile.rb, Rakefile.rb)
  (See full trace by running task with --trace)
  The command "rake" exited with 1.
  Done. Your build exited with 1.
  </code></pre>