diff --git a/src/test/java/org/apache/commons/lang3/StringEscapeUtilsTest.java b/src/test/java/org/apache/commons/lang3/StringEscapeUtilsTest.java
index bdb091694..dcdcbed6b 100644
--- a/src/test/java/org/apache/commons/lang3/StringEscapeUtilsTest.java
+++ b/src/test/java/org/apache/commons/lang3/StringEscapeUtilsTest.java
@@ -32,6 +32,7 @@ import org.junit.Test;
 
 import org.apache.commons.lang3.text.translate.CharSequenceTranslator;
 import org.apache.commons.lang3.text.translate.NumericEntityEscaper;
+import org.apache.commons.lang3.text.translate.NumericEntityUnescaper;
 
 /**
  * Unit tests for {@link StringEscapeUtils}.
@@ -344,6 +345,17 @@ public class StringEscapeUtilsTest {
                 escapeXml.translate("\uD84C\uDFB4"));
     }
     
+    /**
+     * Reverse of the above.
+     *
+     * @see <a href="https://issues.apache.org/jira/browse/LANG-729">LANG-729</a>
+     */
+    @Test
+    public void testUnescapeXmlSupplementaryCharacters() {
+        assertEquals("Supplementary character must be represented using a single escape", "\uD84C\uDFB4",
+                StringEscapeUtils.unescapeXml("&#144308;") );
+    }
+    
     // Tests issue #38569
     // http://issues.apache.org/bugzilla/show_bug.cgi?id=38569
     @Test