1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_functools.py b/Lib/test/test_functools.py
index 2245b97..e325480 100644
--- a/Lib/test/test_functools.py
+++ b/Lib/test/test_functools.py
@@ -2187,6 +2187,13 @@ class TestSingleDispatch(unittest.TestCase):
         ))
         self.assertTrue(str(exc.exception).endswith(msg_suffix))
 
+    def test_invalid_positional_argument(self):
+        @functools.singledispatch
+        def f(*args):
+            pass
+        msg = 'f requires at least 1 positional argument'
+        with self.assertRaisesRegexp(TypeError, msg):
+            f()
 
 if __name__ == '__main__':
     unittest.main()