diff -r 000000000000 -r 6474c204b198 js/src/tests/ecma_5/strict/11.4.1.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/tests/ecma_5/strict/11.4.1.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,45 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ */
+
+/* Deleting an identifier is a syntax error in strict mode code only. */
+assertEq(testLenientAndStrict('delete x;',
+                              parsesSuccessfully,
+                              parseRaisesException(SyntaxError)),
+         true);
+
+/*
+ * A reference expression surrounded by parens is itself a reference
+ * expression.
+ */
+assertEq(testLenientAndStrict('delete (x);',
+                              parsesSuccessfully,
+                              parseRaisesException(SyntaxError)),
+         true);
+
+/* Deleting other sorts of expressions are not syntax errors in either mode. */
+assertEq(testLenientAndStrict('delete x.y;',
+                              parsesSuccessfully,
+                              parsesSuccessfully),
+         true);
+assertEq(testLenientAndStrict('delete Object();',
+                              returns(true),
+                              returns(true)),
+         true);
+
+/* Functions should inherit the surrounding code's strictness. */
+assertEq(testLenientAndStrict('function f() { delete x; }',
+                              parsesSuccessfully,
+                              parseRaisesException(SyntaxError)),
+         true);
+
+/* Local directives override the surrounding code's strictness. */
+assertEq(testLenientAndStrict('function f() { "use strict"; delete x; }',
+                              parseRaisesException(SyntaxError),
+                              parseRaisesException(SyntaxError)),
+         true);
+
+reportCompare(true, true);