@Before public void setup() { converter = new Jaxb2RootElementHttpMessageConverter(); rootElement = new RootElement(); DefaultAopProxyFactory proxyFactory = new DefaultAopProxyFactory(); AdvisedSupport advisedSupport = new AdvisedSupport(); advisedSupport.setTarget(rootElement); advisedSupport.setProxyTargetClass(true); AopProxy proxy = proxyFactory.createAopProxy(advisedSupport); rootElementCglib = (RootElement) proxy.getProxy(); }