diff --git a/Lib/test/test_iterlen.py b/Lib/test/test_iterlen.py
index 1770de2..bcd0a6f 100644
--- a/Lib/test/test_iterlen.py
+++ b/Lib/test/test_iterlen.py
@@ -55,7 +55,9 @@
         return _len(obj)
     except TypeError:
         try:
-            return obj._length_cue()
+            # note: this is an internal undocumented API,
+            # don't rely on it in your own programs
+            return obj.__length_hint__()
         except AttributeError:
             raise TypeError
 
diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index e26065c..6ff1215 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -607,7 +607,9 @@
         for v in self.set:
             self.assert_(v in self.values)
         setiter = iter(self.set)
-        self.assertEqual(setiter._length_cue(), len(self.set))
+        # note: __length_hint__ is an internal undocumented API,
+        # don't rely on it in your own programs
+        self.assertEqual(setiter.__length_hint__(), len(self.set))
 
     def test_pickling(self):
         p = pickle.dumps(self.set)