old_contents: from . import qt_api
  
  if qt_api == 'pyside':
      from PySide.QtCore import *
  elif qt_api == 'pyqt':
      from PyQt4.QtCore import *
  else:
      # Mock objects
      Qt = None
  
new_contents: from . import qt_api
  
  if qt_api == 'pyside':
      from PySide.QtCore import *
  elif qt_api == 'pyqt':
      from PyQt4.QtCore import *
  else:
      # Mock objects
      Qt = None
      pyqtSignal = None
  
subject: Add mock pyqtSignal to try to get Travis to build