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diff --git a/Source/JavaScriptCore/API/tests/FunctionOverridesTest.cpp b/Source/JavaScriptCore/API/tests/FunctionOverridesTest.cpp
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+++ b/Source/JavaScriptCore/API/tests/FunctionOverridesTest.cpp
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+/*
+ * Copyright (C) 2016 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+ * THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "config.h"
+#include "FunctionOverridesTest.h"
+
+#include "FunctionOverrides.h"
+#include "InitializeThreading.h"
+#include "JSContextRefPrivate.h"
+#include "JavaScriptCore.h"
+#include "Options.h"
+#include <string>
+
+using JSC::Options;
+
+int testFunctionOverrides()
+{
+    bool failed = false;
+
+    JSC::initializeThreading();
+    Options::initialize(); // Ensure options is initialized first.
+
+    const char* oldFunctionOverrides = Options::functionOverrides();
+    
+    Options::functionOverrides() = "testapi-function-overrides.js";
+    JSC::FunctionOverrides::reinstallOverrides();
+
+    JSGlobalContextRef context = JSGlobalContextCreateInGroup(nullptr, nullptr);
+
+    JSObjectRef globalObject = JSContextGetGlobalObject(context);
+    ASSERT_UNUSED(globalObject, JSValueIsObject(context, globalObject));
+
+    const char* scriptString =
+        "var str = '';" "\n"
+        "function f1() { /* Original f1 */ }" "\n"
+        "str += f1 + '\\n';" "\n"
+        "var f2 = function() {" "\n"
+        "    // Original f2" "\n"
+        "}" "\n"
+        "str += f2 + '\\n';" "\n"
+        "str += (function() { /* Original f3 */ }) + '\\n';" "\n"
+        "var f4Source = '/* Original f4 */'" "\n"
+        "var f4 =  new Function(f4Source);" "\n"
+        "str += f4 + '\\n';" "\n"
+        "\n"
+        "var expectedStr =" "\n"
+        "'function f1() { /* Overridden f1 */ }\\n"
+        "function () { /* Overridden f2 */ }\\n"
+        "function () { /* Overridden f3 */ }\\n"
+        "function anonymous() { /* Overridden f4 */ }\\n';"
+        "var result = (str == expectedStr);" "\n"
+        "result";
+
+    JSStringRef script = JSStringCreateWithUTF8CString(scriptString);
+    JSValueRef exception = nullptr;
+    JSValueRef resultRef = JSEvaluateScript(context, script, nullptr, nullptr, 1, &exception);
+
+    if (!JSValueIsBoolean(context, resultRef) || !JSValueToBoolean(context, resultRef))
+        failed = true;
+
+    JSGlobalContextRelease(context);
+    
+    JSC::Options::functionOverrides() = oldFunctionOverrides;
+    JSC::FunctionOverrides::reinstallOverrides();
+
+    printf("%s: function override tests.\n", failed ? "FAIL" : "PASS");
+
+    return failed;
+}