assertNull(events.get(0).getLoggerName());
        assertEquals("null logger message", events.get(0).getMessage());
    }

    @Test
    public void test_append_excludedLogger_logNotificationTarget() {
        final LogEvent event = createLogEvent(Level.ERROR, "org.codelibs.fess.timer.LogNotificationTarget", "should be excluded");
        appender.append(event);