1 files changed, 10 insertions, 1 deletions
diff --git a/Lib/test/test_deque.py b/Lib/test/test_deque.py
index 2ca508d..e2c6b6c 100644
--- a/Lib/test/test_deque.py
+++ b/Lib/test/test_deque.py
@@ -289,7 +289,7 @@ class TestBasic(unittest.TestCase):
                     else:
                         self.assertEqual(d.index(element, start, stop), target)
 
-    def test_insert_bug_24913(self):
+    def test_index_bug_24913(self):
         d = deque('A' * 3)
         with self.assertRaises(ValueError):
             i = d.index("Hello world", 0, 4)
@@ -669,6 +669,15 @@ class TestBasic(unittest.TestCase):
         self.assertNotEqual(id(d), id(e))
         self.assertEqual(list(d), list(e))
 
+        for i in range(5):
+            for maxlen in range(-1, 6):
+                s = [random.random() for j in range(i)]
+                d = deque(s) if maxlen == -1 else deque(s, maxlen)
+                e = d.copy()
+                self.assertEqual(d, e)
+                self.assertEqual(d.maxlen, e.maxlen)
+                self.assertTrue(all(x is y for x, y in zip(d, e)))
+
     def test_copy_method(self):
         mut = [10]
         d = deque([mut])