1 files changed, 14 insertions, 0 deletions
diff --git a/tests/invalid_models_tests/test_relative_fields.py b/tests/invalid_models_tests/test_relative_fields.py
index 8909b12214..6fef14c335 100644
--- a/tests/invalid_models_tests/test_relative_fields.py
+++ b/tests/invalid_models_tests/test_relative_fields.py
@@ -128,6 +128,20 @@ class RelativeFieldTests(SimpleTestCase):
             ),
         ])
 
+    def test_many_to_many_with_useless_related_name(self):
+        class ModelM2M(models.Model):
+            m2m = models.ManyToManyField('self', related_name='children')
+
+        field = ModelM2M._meta.get_field('m2m')
+        self.assertEqual(ModelM2M.check(), [
+            DjangoWarning(
+                'related_name has no effect on ManyToManyField with '
+                'a symmetrical relationship, e.g. to "self".',
+                obj=field,
+                id='fields.W345',
+            ),
+        ])
+
     def test_ambiguous_relationship_model_from(self):
         class Person(models.Model):
             pass