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diff --git a/layout/reftests/bugs/376532-3.html b/layout/reftests/bugs/376532-3.html
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+++ b/layout/reftests/bugs/376532-3.html
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+<!DOCTYPE html>
+<!-- Reftest for bug 376532: should show single missing glyph box for non-BMP
+     characters (not surrogates)
+     Test 3 is a non-equality test to catch the case where a single missing
+     glyph box is shown with the low surrogate code point. The test page
+     contains U+BF2AD (DABC DEAD) and the reference page U+CFEAD (DAFF DEAD)
+-->
+<html>
+ <head>
+  <meta http-equiv="content-type" content="text/html; charset=utf-8">
+ </head>
+  <style type="text/css">
+p {   
+  font-size: 36pt;
+}
+  </style>
+ <body>
+  <p>&#xbf2ad;</p>
+ </body>
+</html>