diff --git a/Lib/test/test_itertools.py b/Lib/test/test_itertools.py
index 6898725..2baa507 100644
--- a/Lib/test/test_itertools.py
+++ b/Lib/test/test_itertools.py
@@ -58,6 +58,10 @@
         self.assertEqual(repr(c), 'count(3)')
         c.next()
         self.assertEqual(repr(c), 'count(4)')
+        c = count(-9)
+        self.assertEqual(repr(c), 'count(-9)')
+        c.next()
+        self.assertEqual(c.next(), -8)
 
     def test_cycle(self):
         self.assertEqual(take(10, cycle('abc')), list('abcabcabca'))