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-rw-r--r--tests/modeltests/custom_pk/fields.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/tests/modeltests/custom_pk/fields.py b/tests/modeltests/custom_pk/fields.py
index d25eeca1d5..2494d5fd2c 100644
--- a/tests/modeltests/custom_pk/fields.py
+++ b/tests/modeltests/custom_pk/fields.py
@@ -22,8 +22,7 @@ class MyWrapper(object):
return self.value == other.value
return self.value == other
-class MyAutoField(models.CharField):
- __metaclass__ = models.SubfieldBase
+class MyAutoField(six.with_metaclass(models.SubfieldBase, models.CharField)):
def __init__(self, *args, **kwargs):
kwargs['max_length'] = 10