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-rw-r--r--tests/test_constructor.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/tests/test_constructor.py b/tests/test_constructor.py
index bb01692..0aacf17 100644
--- a/tests/test_constructor.py
+++ b/tests/test_constructor.py
@@ -231,6 +231,8 @@ def _serialize_value(data):
return repr(data.utctimetuple())
elif isinstance(data, unicode):
return data.encode('utf-8')
+ elif isinstance(data, float) and data != data:
+ return '?'
else:
return str(data)