Testing Spring WS - how test BadRequest

I would like test my service return a 400 Bad request when it receive a payload with bad attribute.

I'm using an valid payload and add an invalid attribut. In SOAP-UI, it return a 400 bad request, but not with MockWebServiceClient, the bad attribute is skipped and process the request well.

@WebServiceServerTest({ MyEndpoint.class, WebServiceConfig.class})
class MyEndpointTests {

    @Autowired
    private MockWebServiceClient client;
    @Value("classpath:endpoint/request/myEndoint.myRequest.xml")
    private Resource requestFile;

        @Test
        void myEndpoint_InvalidRequest() throws Exception {

            XMLTransformer transformer = new XMLTransformer(requestValidFile);
            transformer.add("http://namespace.foo.bar/", "myRequest",
                    "http://namespace.foo.bar/", "thisIsNotAValidAttribute", "false");


            this.client
                    .sendRequest(RequestCreators.withSoapEnvelope(transformer.getSource()))
                    .andExpect(ResponseMatchers.serverOrReceiverFault());
        }

How can i test that ?