Version of Seam? Does this error occur if you run the tests using ant build.xml from seam-gen? View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105368#4105368 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4105368