Issue #16991: Ensure that the proper OrderedDict is used in tests.

Lib/test/test_collections.py

@@ -1979,6 +1979,7 @@ class OrderedDictTests:
         self.assertGreater(sys.getsizeof(od), sys.getsizeof(d))
 
     def test_views(self):
+        OrderedDict = self.module.OrderedDict
         # See http://bugs.python.org/issue24286
         s = 'the quick brown fox jumped over a lazy dog yesterday before dawn'.split()
         od = OrderedDict.fromkeys(s)