Issue 10786: unittest.TextTestRunner default stream no longer bound at import time
diff --git a/Lib/unittest/runner.py b/Lib/unittest/runner.py
index c5e4258..10c4778 100644
--- a/Lib/unittest/runner.py
+++ b/Lib/unittest/runner.py
@@ -125,8 +125,10 @@
"""
resultclass = TextTestResult
- def __init__(self, stream=sys.stderr, descriptions=True, verbosity=1,
+ def __init__(self, stream=None, descriptions=True, verbosity=1,
failfast=False, buffer=False, resultclass=None, warnings=None):
+ if stream is None:
+ stream = sys.stderr
self.stream = _WritelnDecorator(stream)
self.descriptions = descriptions
self.verbosity = verbosity