"flavia.rainone(a)jboss.com" wrote : that should return a class loaded by a BaseClassLoader, are returning a class loaded by the AppClassLoader. This sounds like the issue we had before -- classes "leaking" into system cl, where we should really only allow java.* packages through. What's the "L loader" in TestScenario.cannotLoadClass(L loader, String className)? Could be by-passing some rules? View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4269270#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...