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-rw-r--r--Lib/test/test_weakref.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/Lib/test/test_weakref.py b/Lib/test/test_weakref.py
index b7f985c..4073d49 100644
--- a/Lib/test/test_weakref.py
+++ b/Lib/test/test_weakref.py
@@ -116,6 +116,10 @@ class ReferencesTestCase(TestBase):
ref1 = weakref.ref(c, callback)
del c
+ def test_constructor_kwargs(self):
+ c = C()
+ self.assertRaises(TypeError, weakref.ref, c, callback=None)
+
def test_proxy_ref(self):
o = C()
o.bar = 1