<p>Test items in review queues that are designed to help new reviewers hone their moderation skills, while nudging more experienced users that don't seem to be paying close attention to what they're reviewing.</p>

<h2>Meta FAQ reference</h2>

<p><a href="http://meta.stackexchange.com/questions/157121/why-was-i-told-congratulations-this-was-only-a-test-when-reviewing">What are review tests (audits) and how do they work?</a></p>

<blockquote>
  <p>I recently received this rather amusing message while reviewing a user's first post:</p>
  
  <blockquote>
    <h3>Congratulations!</h3>
    
    <p>This was only a test, designed to make sure you were paying attention. This post 
    has already been removed, but thanks for taking time to leave feedback for the author.</p>
  </blockquote>
  
  <ul>
  <li>What is the purpose of this test?</li>
  </ul>
</blockquote>

<h2>See also</h2>

<p><ul>
<li><a href="http://blog.stackoverflow.com/2012/11/se-podcast-37/">SE Podcast #37 – Back At It, Again</a><br></p>

<blockquote>
  <p><ul>
  <li>One of the problems with the review queue is people clicking “Looks good” all the way through just so they can get a badge. Who would do such a thing?<br>
  [Spoiler alert: We will talk about the review queue for a really long time.]</li>
  <li>Ideally we want to teach you, instead of building something that quietly ignores you when you do something wrong. In certain queues, we use fake review items that catch you when you choose the wrong option.</li>
  </ul></li>
  </ul></p>
</blockquote>