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diff --git a/js/src/tests/js1_5/Expressions/regress-96526-delelem.js b/js/src/tests/js1_5/Expressions/regress-96526-delelem.js
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index 000000000..d66faed4e
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+++ b/js/src/tests/js1_5/Expressions/regress-96526-delelem.js
@@ -0,0 +1,91 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ *
+ * Date:    29 Oct 2002
+ * SUMMARY: Testing "use" and "set" operations on expressions like a[i][j][k]
+ * See http://bugzilla.mozilla.org/show_bug.cgi?id=96526#c52
+ *
+ * Brendan: "The idea is to cover all the 'use' and 'set' (as in modify)
+ * operations you can do on an expression like a[i][j][k], including variations
+ * where you replace |a| with arguments (literally) and |i| with 0, 1, 2, etc.
+ * (to hit the optimization for arguments[0]... that uses JSOP_ARGSUB)."
+ */
+//-----------------------------------------------------------------------------
+var UBound = 0;
+var BUGNUMBER = 96526;
+var summary = 'Testing "use" and "set" ops on expressions like a[i][j][k]';
+var status = '';
+var statusitems = [];
+var actual = '';
+var actualvalues = [];
+var expect= '';
+var expectedvalues = [];
+
+var z='magic';
+Number.prototype.magic=42;
+f(2,1,[-1,0,[1,2,[3,4]]]);
+
+function f(j,k,a)
+{
+  status = inSection(1);
+  actual = formatArray(a[2]);
+  expect = formatArray([1,2,[3,4]]);
+  addThis();
+
+  status = inSection(2);
+  actual = formatArray(a[2][j]);
+  expect = formatArray([3,4]);
+  addThis();
+
+  status = inSection(3);
+  actual = a[2][j][k];
+  expect = 4;
+  addThis();
+
+  status = inSection(4);
+  actual = a[2][j][k][z];
+  expect = 42;
+  addThis();
+
+  delete a[2][j][k];
+
+  status = inSection(5);
+  actual = formatArray(a[2][j]);
+  expect = '[3, ,]';
+  addThis();
+}
+
+
+
+//-----------------------------------------------------------------------------
+test();
+//-----------------------------------------------------------------------------
+
+
+
+function addThis()
+{
+  statusitems[UBound] = status;
+  actualvalues[UBound] = actual;
+  expectedvalues[UBound] = expect;
+  UBound++;
+}
+
+
+function test()
+{
+  enterFunc('test');
+  printBugNumber(BUGNUMBER);
+  printStatus(summary);
+
+  for (var i=0; i<UBound; i++)
+  {
+    reportCompare(expectedvalues[i], actualvalues[i], statusitems[i]);
+  }
+
+  exitFunc ('test');
+}