diff --git a/tests/test_serializer_lists.py b/tests/test_serializer_lists.py
index 4f9a42187..daa5765ce 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)
-    NullableOneToOneSource,
     OneToOneTarget
 )