1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_tuple.py b/Lib/test/test_tuple.py
index e41711c8e69..14c64308694 100644
--- a/Lib/test/test_tuple.py
+++ b/Lib/test/test_tuple.py
@@ -201,6 +201,14 @@ class TupleTest(seq_tests.CommonTest):
         with self.assertRaises(TypeError):
             [3,] + T((1,2))
 
+    def test_lexicographic_ordering(self):
+        # Issue 21100
+        a = self.type2test([1, 2])
+        b = self.type2test([1, 2, 0])
+        c = self.type2test([1, 3])
+        self.assertLess(a, b)
+        self.assertLess(b, c)
+
 def test_main():
     support.run_unittest(TupleTest)