1 files changed, 8 insertions, 0 deletions
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 9211360..51b66b7 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -288,6 +288,14 @@ class TestBasic(unittest.TestCase):
                     else:
                         self.assertEqual(d.index(element, start, stop), target)
 
+        # Test large start argument
+        d = deque(range(0, 10000, 10))
+        for step in range(100):
+            i = d.index(8500, 700)
+            self.assertEqual(d[i], 8500)
+            # Repeat test with a different internal offset
+            d.rotate()
+
     def test_index_bug_24913(self):
         d = deque('A' * 3)
         with self.assertRaises(ValueError):