Thanks! Download junit-4.X.jar and copy into ${JBOSS_HOME}/lib/endorsed. got no error for ant tests View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4193562#4193562 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4193562