Add a comment explains why we should modify mtime here.
diff --git a/Lib/test/test_traceback.py b/Lib/test/test_traceback.py
index da56e0d..e8777da 100644
--- a/Lib/test/test_traceback.py
+++ b/Lib/test/test_traceback.py
@@ -52,12 +52,14 @@
def test():
raise ValueError"""
- # XXX Unclear why we're doing this next bit.
+ # if this test runs fast, test_bug737473.py will have same mtime
+ # even if it's rewrited and it'll not reloaded. so adjust mtime
+ # of original to past.
if hasattr(os, 'utime'):
past = time.time() - 3
os.utime(testfile, (past, past))
else:
- time.sleep(3) # not to stay in same mtime.
+ time.sleep(3)
if 'test_bug737473' in sys.modules:
del sys.modules['test_bug737473']