JIRA: https://jira.jboss.org/jira/browse/JBCL-21 I've got it as far as this: | 2230 ERROR [ClientClassPathUnitTestCase] ClientLauncher.exception: | java.lang.ClassCastException: class org.jboss.test.classloading.vfs.client.support.launcher.ClientContainer{cl=BaseClassLoader@18bd7f1{Clien | tLauncherClassLoader:0.0.0$MODULE} codeSource=(vfsfile:/home/ejort/jboss-cl/classloading-vfs/target/tests-classes/ <no signer certificates>) | } is not an instanceof class org.jboss.test.classloading.vfs.client.support.launcher.ClientContainer{cl=sun.misc.Launcher$AppClassLoader@1a5 | ab41 codeSource=(file:/home/ejort/jboss-cl/classloading-vfs/target/tests-classes/ <no signer certificates>)} | at org.jboss.test.classloading.vfs.client.support.launcher.ClientLauncher.getBean(ClientLauncher.java:147) | at org.jboss.test.classloading.vfs.client.support.launcher.ClientLauncher.launch(ClientLauncher.java:407) | So it is failing now because you're instantiating the ClientContainer using the BaseClassLoader but the ClientLauncher bootstrap is referencing the one from the classpath. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4166637#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...