1 files changed, 1 insertions, 0 deletions
diff --git a/runtest.py b/runtest.py
index a5225f1b..32e99d6d 100644
--- a/runtest.py
+++ b/runtest.py
@@ -752,6 +752,7 @@ tests = list(map(Test, tests))
 class Unbuffered:
     def __init__(self, file):
         self.file = file
+        self.softspace = 0  ## backward compatibility; not supported in Py3k
     def write(self, arg):
         self.file.write(arg)
         self.file.flush()