diff --git a/rest_framework/pagination.py b/rest_framework/pagination.py
index 862941e79..2b51b3295 100644
--- a/rest_framework/pagination.py
+++ b/rest_framework/pagination.py
@@ -658,7 +658,7 @@ class CursorPagination(BasePagination):
             for i in range(len(ordering)):
                 # The first operands need to be equals
                 # the last operands need to be gt
-                equals = list(ordering[:i+2])
+                equals = list(ordering[:i + 2])
                 greater_than_q = q_objects_compare[equals.pop()]
                 sub_filters = [q_objects_equals[e] for e in equals]
                 sub_filters.append(greater_than_q)
diff --git a/tests/test_pagination.py b/tests/test_pagination.py
index 55c4e8833..fb3182b51 100644
--- a/tests/test_pagination.py
+++ b/tests/test_pagination.py
@@ -1,5 +1,4 @@
 import pytest
-import json
 import re
 import operator
 
@@ -13,6 +12,7 @@ from django.test import TestCase
 from rest_framework import (
     exceptions, filters, generics, pagination, serializers, status
 )
+from rest_framework.utils import json
 from rest_framework.pagination import PAGE_BREAK, PageLink
 from rest_framework.request import Request
 from rest_framework.test import APIRequestFactory