[3.2.x] Fixed #32620 -- Allowed subclasses of Big/SmallAutoField for DEFAULT_AUTO_FIELD.

Backport of 45a58c31e64dbfdecab1178b1d00a3803a90ea2d from main

1 files changed, 13 insertions, 1 deletions

diff --git a/tests/model_fields/test_autofield.py b/tests/model_fields/test_autofield.py
index 646cd2ab0a..0ae981c3d9 100644
--- a/tests/model_fields/test_autofield.py
+++ b/tests/model_fields/test_autofield.py
@@ -30,6 +30,18 @@ class AutoFieldInheritanceTests(SimpleTestCase):
                 self.assertIsInstance(field(), models.AutoField)
 
     def test_issubclass_of_autofield(self):
-        for field in (models.BigAutoField, models.SmallAutoField):
+        class MyBigAutoField(models.BigAutoField):
+            pass
+
+        class MySmallAutoField(models.SmallAutoField):
+            pass
+
+        tests = [
+            MyBigAutoField,
+            MySmallAutoField,
+            models.BigAutoField,
+            models.SmallAutoField,
+        ]
+        for field in tests:
             with self.subTest(field.__name__):
                 self.assertTrue(issubclass(field, models.AutoField))