It appears the Spring test client is hardcoded to use the Tuscany runtime:

public class SpringTestRunner extends BaseJAXWSTestRunner {

protected static final URI DOMAIN = URI.create("default");

@Override
    public String invokeTest( String input ) throws Exception

{ // TestService service = SCAClientFactory.newInstance(DOMAIN).getService(TestService.class, testConfiguration.getServiceName()); TestService service = TuscanyRuntimeBridge.instance.node.getService(TestService.class, testConfiguration.getServiceName()); return service.testIt(input);     }

}