IMO the SEI is wrong. Changing it to use an INOUT holder for the header make the test succeed: @WebMethod(operationName = "SubmitBasket") @WebResult(name = "receipt", targetNamespace = "http://www.m-bar-go.com", partName = "response") public Receipt submitBasket( @WebParam(name = "inout", targetNamespace = "http://www.m-bar-go.com", header = true, mode = WebParam.Mode.INOUT) Holder header, @WebParam(name = "basket", targetNamespace = "http://www.m-bar-go.com", partName = "request") Basket request) throws Exception; View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4072442#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...