Issue #4740: Use HIGHEST_PROTOCOL in pickle test.
(There is no behavior difference in 2.x because HIGHEST_PROTOCOL == 2)
diff --git a/Lib/test/test_array.py b/Lib/test/test_array.py
index 2efbc7d..2c4c2fd 100755
--- a/Lib/test/test_array.py
+++ b/Lib/test/test_array.py
@@ -7,7 +7,7 @@
 from test import test_support
 from weakref import proxy
 import array, cStringIO
-from cPickle import loads, dumps
+from cPickle import loads, dumps, HIGHEST_PROTOCOL
 
 class ArraySubclass(array.array):
     pass
@@ -97,7 +97,7 @@
         self.assertEqual(a, b)
 
     def test_pickle(self):
-        for protocol in (0, 1, 2):
+        for protocol in range(HIGHEST_PROTOCOL + 1):
             a = array.array(self.typecode, self.example)
             b = loads(dumps(a, protocol))
             self.assertNotEqual(id(a), id(b))
@@ -112,7 +112,7 @@
             self.assertEqual(type(a), type(b))
 
     def test_pickle_for_empty_array(self):
-        for protocol in (0, 1, 2):
+        for protocol in range(HIGHEST_PROTOCOL + 1):
             a = array.array(self.typecode)
             b = loads(dumps(a, protocol))
             self.assertNotEqual(id(a), id(b))