diff --git a/tests/test_app.py b/tests/test_app.py
index 8f4f5912..35400931 100644
--- a/tests/test_app.py
+++ b/tests/test_app.py
@@ -607,9 +607,12 @@ class TestAppHandler(TestCase):
 
             with self.app.short_session(foo='bar') as s:
                 short_session.assert_called_once()
-                self.assertEqual(len(short_session.call_args), 2)
-                self.assertEqual(short_session.call_args.kwargs['foo'], 'bar')
-                self.assertIsInstance(short_session.call_args.kwargs['factory'], partial)
+                # TODO: python 3.7 mock objects do not have attrs for
+                # args/kwargs, but once we drop that support we can
+                # use those instead of treating call_args as tuple
+                self.assertEqual(len(short_session.call_args[1]), 2)
+                self.assertEqual(short_session.call_args[1]['foo'], 'bar')
+                self.assertIsInstance(short_session.call_args[1]['factory'], partial)
 
     def test_cache_model(self):
         engine = sa.create_engine('sqlite://')