diff --git a/src/etc/testcases/taskdefs/xmlns.xml b/src/etc/testcases/taskdefs/xmlns.xml
new file mode 100644
index 000000000..3e8f65219
--- /dev/null
+++ b/src/etc/testcases/taskdefs/xmlns.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0"?>
+<project name="test">
+
+  <property name="testcases.dir" location="../../../../build/testcases"/>
+
+  <path id="testclasses">
+    <pathelement location="${testcases.dir}" />
+    <pathelement path="${java.class.path}" />
+  </path>
+
+  <target name="xmlns" xmlns:test="this.is.another.test.uri">
+    <typedef classname="org.apache.tools.ant.taskdefs.XmlnsTest$MyTask"
+             classpathref="testclasses"
+             name="mytask"
+             uri="this.is.another.test.uri" />
+    <test:mytask/>
+  </target>
+
+  <target name="xmlns.file" xmlns:test="this.is.a.test.uri">
+    <typedef file="test.antlib.xml"
+             classpathref="testclasses"
+             uri="this.is.a.test.uri" />
+    <test:mytask/>
+  </target>
+
+  <target name="core">
+    <typedef file="test.antlib.xml"
+             classpathref="testclasses"
+             uri="ant:core" />
+    <mytask/>
+  </target>
+
+  <target name="excluded">
+    <typedef file="test.antlib.xml"
+             classpathref="testclasses"
+             uri="ant:notallowed" />
+  </target>
+
+
+</project>
\ No newline at end of file
diff --git a/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java b/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java
new file mode 100644
index 000000000..fab30370b
--- /dev/null
+++ b/src/testcases/org/apache/tools/ant/taskdefs/XmlnsTest.java
@@ -0,0 +1,98 @@
+/*
+ * The Apache Software License, Version 1.1
+ *
+ * Copyright (c) 2003 The Apache Software Foundation.  All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. The end-user documentation included with the redistribution, if
+ *    any, must include the following acknowlegement:
+ *       "This product includes software developed by the
+ *        Apache Software Foundation (http://www.apache.org/)."
+ *    Alternately, this acknowlegement may appear in the software itself,
+ *    if and wherever such third-party acknowlegements normally appear.
+ *
+ * 4. The names "Ant" and "Apache Software
+ *    Foundation" must not be used to endorse or promote products derived
+ *    from this software without prior written permission. For written
+ *    permission, please contact apache@apache.org.
+ *
+ * 5. Products derived from this software may not be called "Apache"
+ *    nor may "Apache" appear in their names without prior written
+ *    permission of the Apache Group.
+ *
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ */
+
+package org.apache.tools.ant.taskdefs;
+
+import org.apache.tools.ant.BuildFileTest;
+import org.apache.tools.ant.Project;
+import org.apache.tools.ant.Task;
+
+/**
+ * @author Peter Reilly
+ */
+public class XmlnsTest extends BuildFileTest {
+    public XmlnsTest(String name) {
+        super(name);
+    }
+
+    public void setUp() {
+        configureProject("src/etc/testcases/taskdefs/xmlns.xml");
+    }
+
+    public void testXmlns() {
+        expectLog("xmlns", "MyTask called");
+    }
+
+    public void testXmlnsFile() {
+        expectLog("xmlns.file", "MyTask called");
+    }
+
+    public void testCore() {
+        expectLog("core", "MyTask called");
+    }
+
+    public void testExcluded() {
+        expectBuildExceptionContaining(
+            "excluded", "excluded uri",
+            "Attempt to use use a reserved URI ant:notallowed");
+    }
+
+    public static class MyTask extends Task {
+        public void execute() {
+            log("MyTask called");
+        }
+    }
+
+}
+