1 files changed, 10 insertions, 1 deletions
diff --git a/tests/test_utils/test_testcase.py b/tests/test_utils/test_testcase.py
index 8a367391cb..f374549400 100644
--- a/tests/test_utils/test_testcase.py
+++ b/tests/test_utils/test_testcase.py
@@ -1,7 +1,7 @@
 from django.db import IntegrityError, transaction
 from django.test import TestCase, skipUnlessDBFeature
 
-from .models import PossessedCar
+from .models import Car, PossessedCar
 
 
 class TestTestCase(TestCase):
@@ -18,3 +18,12 @@ class TestTestCase(TestCase):
             car.delete()
         finally:
             self._rollback_atomics = rollback_atomics
+
+    def test_disallowed_database_queries(self):
+        message = (
+            "Database queries to 'other' are not allowed in this test. "
+            "Add 'other' to test_utils.test_testcase.TestTestCase.databases to "
+            "ensure proper test isolation and silence this failure."
+        )
+        with self.assertRaisesMessage(AssertionError, message):
+            Car.objects.using('other').get()