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-rw-r--r--python/subunit/v2.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/python/subunit/v2.py b/python/subunit/v2.py
index 254617c..7f4842e 100644
--- a/python/subunit/v2.py
+++ b/python/subunit/v2.py
@@ -223,6 +223,8 @@ class StreamResultToBytes(object):
offset = 0
while offset < datalen:
written = self.output_stream.write(view[offset:])
+ if written is None:
+ break
offset += written
else:
self.output_stream.write(data)