diff --git a/tests/test_serializer_lists.py b/tests/test_serializer_lists.py
index 9cc2f7eaa..4f9a42187 100644
--- a/tests/test_serializer_lists.py
+++ b/tests/test_serializer_lists.py
@@ -7,7 +7,6 @@ from django.utils.datastructures import MultiValueDict
 from rest_framework import serializers
 from rest_framework.exceptions import ErrorDetail
 from tests.models import (CustomManagerModel, NullableOneToOneSource, OneToOneTarget)
-    CustomManagerModel,
     NullableOneToOneSource,
     OneToOneTarget
 )