mark implementation detail as such

diff --git a/Lib/test/test_enumerate.py b/Lib/test/test_enumerate.py
index d3b9e818cbdfe86aeed6f658ba70a310eeab4571..6b9ff79aa1a763dea9b4ec587be6c9a078aaef61 100644 (file)
--- a/Lib/test/test_enumerate.py
+++ b/Lib/test/test_enumerate.py
@@ -152,6 +152,7 @@ class TestReversed(unittest.TestCase):
         x = xrange(1)
         self.assertEqual(type(reversed(x)), type(iter(x)))
 
+    @test_support.cpython_only
     def test_len(self):
         # This is an implementation detail, not an interface requirement
         from test.test_iterlen import len