diff --git a/tests/test_serializer.py b/tests/test_serializer.py
index cfa2e838c..9e286babd 100644
--- a/tests/test_serializer.py
+++ b/tests/test_serializer.py
@@ -11,6 +11,7 @@ from django.db import models
 
 from rest_framework import exceptions, fields, relations, serializers
 from rest_framework.fields import Field
+
 from .models import (
     ForeignKeyTarget, NestedForeignKeySource, NullableForeignKeySource
 )