Thread[] ts = new Thread[tg.activeCount()];
            tg.enumerate(ts);

            for (Thread active : ts) {
                String name = active.getName();
                boolean daemon = active.isDaemon();
                assertTrue(daemon, name + " is no daemon Thread.");
            }
        }

        assertTrue(seen, "Could not find ThreadGroup: " + DefaultArtifactResolver.DaemonThreadCreator.THREADGROUP_NAME);