diff --git a/src/etc/testcases/taskdefs/available.xml b/src/etc/testcases/taskdefs/available.xml
index 09fb39e49..324c054d1 100644
--- a/src/etc/testcases/taskdefs/available.xml
+++ b/src/etc/testcases/taskdefs/available.xml
@@ -132,13 +132,9 @@
 
   <target name="test21">
     <available property="test" ignoresystemclasses="true"
-               classname="java.awt.Graphics">
+               classname="org.apache.tools.ant.launch.AntMain">
       <classpath>
-        <pathelement location="${java.home}/lib/rt.jar" />
-        <pathelement location="${java.home}/lib/classes.zip" />
-        <pathelement location="${java.home}/lib/graphics.jar" /> <!-- IBM JDK -->
-        <pathelement location="/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Classes/classes.jar" />
-        <pathelement location="/System/Library/Frameworks/JavaVM.framework/Versions/CurrentJDK/Classes/ui.jar" />
+        <pathelement location="${ant.home}/lib/ant-launcher.jar" />
       </classpath>
     </available>
   </target>