title: Excluding a PHP Interface from PHPUnit code coverage
body: <p>I've got a PHPUnit test that tests a class called HelpTokenizerTest. This class implements TokenizerInterface. For some weird reason I cannot exclude the TokenizerInterface from code coverage. </p>
  
  <p>It shows up in code coverage reports as not covered, despite using @codeCoverageIgnore or even @codeCoverageIgnoreStart/End.</p>
  
  <p>Any ideas?</p>
  
  <p>I don't want the interface included in my test coverage, as it doesn't do anything. What's the point of testing an Interface.</p>