Ticket #17688: 17688.diff

tests/modeltests/m2m_signals/tests.py

@@ -427 +427 @@
             'objects': [self.alice, self.bob],
         })
         self.assertEqual(self.m2m_changed_messages, expected_messages)
+
+    def test_m2m_signal_on_delete(self):
+        self.vw.default_parts.add(self.engine)
+        self.m2m_changed_messages = []
+        self.vw.delete()
+        self.assertTrue(len(self.m2m_changed_messages) > 0)