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-rw-r--r--Lib/test/test_datetime.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index 1a86353..d246d60 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -231,6 +231,13 @@ class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase):
eq(a//10, td(0, 7*24*360))
eq(a//3600000, td(0, 0, 7*24*1000))
+ # Issue #11576
+ eq(td(999999999, 86399, 999999) - td(999999999, 86399, 999998),
+ td(0, 0, 1))
+ eq(td(999999999, 1, 1) - td(999999999, 1, 0),
+ td(0, 0, 1))
+
+
def test_disallowed_computations(self):
a = timedelta(42)