old_contents: """
  Make sure that the various IK classes can be successfully serialized and
  deserialized. This is important when using IK with Celery.
  
  """
  
  from .utils import create_photo, pickleback
  
  
  def test_imagespecfield():
      instance = create_photo('pickletest2.jpg')
      thumbnail = pickleback(instance.thumbnail)
      thumbnail.source_file
  
new_contents: """
  Make sure that the various IK classes can be successfully serialized and
  deserialized. This is important when using IK with Celery.
  
  """
  
  from .utils import create_photo, pickleback
  
  
  def test_imagespecfield():
      instance = create_photo('pickletest2.jpg')
      thumbnail = pickleback(instance.thumbnail)
      thumbnail.generate()
  
subject: Fix test