diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index 2b0761cfc..0447eb74d 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -30,7 +30,9 @@ from django.utils.timezone import utc
 from django.utils.translation import gettext_lazy as _
 from pytz.exceptions import InvalidTimeError
 
-from rest_framework import ISO_8601, RemovedInDRF313Warning, RemovedInDRF314Warning
+from rest_framework import (
+    ISO_8601, RemovedInDRF313Warning, RemovedInDRF314Warning
+)
 from rest_framework.compat import ProhibitNullCharactersValidator
 from rest_framework.exceptions import ErrorDetail, ValidationError
 from rest_framework.settings import api_settings