  from django.core import validators
  from django.core.exceptions import ValidationError
  from django.db import connection, models
  from django.test import SimpleTestCase, TestCase
  from django.utils import six
  
  from .models import (
      BigIntegerModel, IntegerModel, PositiveIntegerModel,
      PositiveSmallIntegerModel, SmallIntegerModel,
  )
 
</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 validators
  from django.core.exceptions import ValidationError
  from django.db import connection, models
  from django.test import SimpleTestCase, TestCase

  
  from .models import (
      BigIntegerModel, IntegerModel, PositiveIntegerModel,
      PositiveSmallIntegerModel, SmallIntegerModel,
  )
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/model_fields/test_integerfield.py