diff --git a/src/tests/antunit/taskdefs/optional/replaceregexp-test.xml b/src/tests/antunit/taskdefs/optional/replaceregexp-test.xml
new file mode 100644
index 000000000..2d64ce7a9
--- /dev/null
+++ b/src/tests/antunit/taskdefs/optional/replaceregexp-test.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<project default="antunit" xmlns:au="antlib:org.apache.ant.antunit">
+  <import file="../../antunit-base.xml" />
+
+  <target name="testRCSupport">
+    <mkdir dir="${output}"/>
+    <echo file="${output}/text.txt"><![CDATA[
+Hello, world!
+]]></echo>
+    <replaceregexp match="world" replace="Ant">
+      <file file="${output}/text.txt"/>
+    </replaceregexp>
+    <au:assertResourceContains
+       resource="${output}/text.txt" value="Hello, Ant!"/>
+  </target>
+</project>