          as `False` by BooleanField.
          """
          # This class mocks up a dictionary like object, that behaves
          # as if it was returned for multipart or urlencoded data.
          class MockHTMLDict(dict):
              getlist = None
          serializer = self.Serializer(data=MockHTMLDict())
          assert serializer.is_valid()
          assert serializer.validated_data == {'archived': False}
  
  
 
</s> remove class MockHTMLDict(dict):
    """
    This class mocks up a dictionary like object, that behaves
    as if it was returned for multipart or urlencoded data.
    """
    getlist = None


 </s> add 
          as `False` by BooleanField.
          """
          # This class mocks up a dictionary like object, that behaves
          # as if it was returned for multipart or urlencoded data.


          serializer = self.Serializer(data=MockHTMLDict())
          assert serializer.is_valid()
          assert serializer.validated_data == {'archived': False}
  
  
keep keep keep keep replace replace keep keep keep keep keep
 Remove an extra MockHTMLDict definition. 
tests/test_fields.py