fix imports in tests

tests/test_fields.py

@@ -5,11 +5,13 @@ import re
 import sys
 import uuid
 from decimal import ROUND_DOWN, ROUND_UP, Decimal
+from enum import auto
 from unittest.mock import patch
 
 import pytest
 import pytz
 from django.core.exceptions import ValidationError as DjangoValidationError
+from django.db.models import IntegerChoices
 from django.http import QueryDict
 from django.test import TestCase, override_settings
 from django.utils.timezone import activate, deactivate, override
@@ -1825,9 +1827,6 @@ class TestChoiceField(FieldValues):
         assert exc_info.value.detail == ['"2" is not a valid choice.']
 
     def test_enum_choices(self):
-        from enum import auto
-        from django.db.models import IntegerChoices
-
         class ChoiceCase(IntegerChoices):
             first = auto()
             second = auto()