diff -r 000000000000 -r 6474c204b198 js/src/jsapi-tests/testJSEvaluateScript.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/jsapi-tests/testJSEvaluateScript.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ */
+
+#include "jsapi-tests/tests.h"
+
+BEGIN_TEST(testJSEvaluateScript)
+{
+    JS::RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), global));
+    CHECK(obj);
+
+    CHECK(JS::ContextOptionsRef(cx).varObjFix());
+
+    static const char src[] = "var x = 5;";
+
+    JS::RootedValue retval(cx);
+    CHECK(JS_EvaluateScript(cx, obj, src, sizeof(src) - 1, __FILE__, __LINE__, &retval));
+
+    bool hasProp = true;
+    CHECK(JS_AlreadyHasOwnProperty(cx, obj, "x", &hasProp));
+    CHECK(!hasProp);
+
+    hasProp = false;
+    CHECK(JS_HasProperty(cx, global, "x", &hasProp));
+    CHECK(hasProp);
+
+    // Now do the same thing, but without JSOPTION_VAROBJFIX
+    JS::ContextOptionsRef(cx).setVarObjFix(false);
+
+    static const char src2[] = "var y = 5;";
+
+    CHECK(JS_EvaluateScript(cx, obj, src2, sizeof(src2) - 1, __FILE__, __LINE__, &retval));
+
+    hasProp = false;
+    CHECK(JS_AlreadyHasOwnProperty(cx, obj, "y", &hasProp));
+    CHECK(hasProp);
+
+    hasProp = true;
+    CHECK(JS_AlreadyHasOwnProperty(cx, global, "y", &hasProp));
+    CHECK(!hasProp);
+
+    return true;
+}
+END_TEST(testJSEvaluateScript)
+
+