diff --git a/test/language/arguments-object/mapped/mapped-arguments-nonconfigurable-nonwritable-3.js b/test/language/arguments-object/mapped/mapped-arguments-nonconfigurable-nonwritable-3.js
index aac554c2f3..dca0adcd23 100755
--- a/test/language/arguments-object/mapped/mapped-arguments-nonconfigurable-nonwritable-3.js
+++ b/test/language/arguments-object/mapped/mapped-arguments-nonconfigurable-nonwritable-3.js
@@ -8,7 +8,6 @@ description: >
     non-writable. Perform property attribute changes with two
     [[DefineOwnProperty]] calls. Add intervening call to
     SetMutableBinding.
-    Specification bug: https://bugs.ecmascript.org/show_bug.cgi?id=4371
 flags: [noStrict]
 ---*/
 
@@ -17,11 +16,13 @@ function argumentsNonConfigurableThenNonWritableWithInterveningSetMutableBinding
   a = 2;
   Object.defineProperty(arguments, "0", {writable: false});
   assert.sameValue(a, 2);
-  assert.sameValue(arguments[0], 1);
+  // `arguments[0] === 1` per ES2015, Rev 38, April 14, 2015 Final Draft.
+  // Specification bug: https://bugs.ecmascript.org/show_bug.cgi?id=4371
+  assert.sameValue(arguments[0], 2);
 
   // Postcondition: Arguments mapping is removed.
   a = 3;
   assert.sameValue(a, 3);
-  assert.sameValue(arguments[0], 1);
+  assert.sameValue(arguments[0], 2);
 }
 argumentsNonConfigurableThenNonWritableWithInterveningSetMutableBinding(1);