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-rw-r--r--Lib/unittest/runner.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/unittest/runner.py b/Lib/unittest/runner.py
index 2112262e4e..2c5ea4ab07 100644
--- a/Lib/unittest/runner.py
+++ b/Lib/unittest/runner.py
@@ -167,7 +167,7 @@ class TextTestRunner(object):
if self.warnings in ['default', 'always']:
warnings.filterwarnings('module',
category=DeprecationWarning,
- message='Please use assert\w+ instead.')
+ message=r'Please use assert\w+ instead.')
startTime = time.time()
startTestRun = getattr(result, 'startTestRun', None)
if startTestRun is not None: