diff --git a/intl/uconv/tests/unit/test_bug367026.js b/intl/uconv/tests/unit/test_bug367026.js
new file mode 100644
index 00000000000..d892ecfcdc0
--- /dev/null
+++ b/intl/uconv/tests/unit/test_bug367026.js
@@ -0,0 +1,37 @@
+/* Tests conversion from Unicode to HZ-GB-2312 (bug 367026)
+ *
+ * Notes:
+ * HZ-GB-2312 is a 7-bit encoding of the GB2312 simplified Chinese character
+ * set. It uses the escape sequences "~{" to mark the start of GB encoded text
+ * and "~}" to mark the end.
+ *
+ * See http://www.ietf.org/rfc/rfc1843.txt
+ */
+
+const inASCII = "Hello World";
+const inHanzi = "\u4E00";
+const inMixed = "Hello \u4E00 World";
+    
+const expectedASCII = "Hello World";
+const expectedHanzi = "~{R;~}";
+const expectedMixed = "Hello ~{R;~} World";
+
+const charset = "HZ-GB-2312";
+    
+function run_test() {
+    var ScriptableUnicodeConverter =
+	Components.Constructor("@mozilla.org/intl/scriptableunicodeconverter",
+			       "nsIScriptableUnicodeConverter");
+
+    var converter = new ScriptableUnicodeConverter();
+    converter.charset = charset;
+
+    var outASCII = converter.ConvertFromUnicode(inASCII) + converter.Finish();
+    do_check_eq(outASCII, expectedASCII);
+
+    var outMixed = converter.ConvertFromUnicode(inMixed) + converter.Finish();
+    do_check_eq(outMixed, expectedMixed);
+
+    var outHanzi = converter.ConvertFromUnicode(inHanzi) + converter.Finish();
+    do_check_eq(outHanzi, expectedHanzi);
+}