  
  from django.core import serializers
  from django.core.serializers.xml_serializer import DTDForbidden
  from django.test import TestCase, TransactionTestCase
  from django.utils import six
  
  from .tests import SerializersTestBase, SerializersTransactionTestBase
  
  
  class XmlSerializerTestCase(SerializersTestBase, TestCase):
 
</s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add  </s> remove from django.utils import six
 </s> add 
  
  from django.core import serializers
  from django.core.serializers.xml_serializer import DTDForbidden
  from django.test import TestCase, TransactionTestCase

  
  from .tests import SerializersTestBase, SerializersTransactionTestBase
  
  
  class XmlSerializerTestCase(SerializersTestBase, TestCase):
keep keep keep keep replace keep keep keep keep keep
 Refs #23919 -- Removed six.<various>_types usage

Thanks Tim Graham and Simon Charette for the reviews. 
tests/serializers/test_xml.py