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-rw-r--r--test/test_util.py1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/test_util.py b/test/test_util.py
index 0813a0b..780f475 100644
--- a/test/test_util.py
+++ b/test/test_util.py
@@ -750,6 +750,7 @@ def hash(value):
self.assertIs(obj(), obj)
self.assertIs(obj(1, "a"), obj)
self.assertIs(obj(foo="bar"), obj)
+ self.assertEqual(util.json_dumps(obj), "null")
i = 0
for _ in obj: