title: "Error spawning child process: No such file or directory" Xcode
body: <p>Xcode 5.1 shows that unit test framework I use is deprecated. After migrating to <code>XCTest</code> from <code>SenTestingKit</code>. I get this message in console:</p>
  
  <pre><code>Error spawning child process: No such file or directory
  </code></pre>
  
  <p>I tried to clean <code>Cmd + K</code> but it does not help. Xcode restart does not help too.</p>
  
  <p>Anyone encountered such problem?</p>