Remember, what you put in your consumer contract is what is gonig to be replayed against your provider. So all it’s telling you is that given the request you defined, it should respond with your assertions. Obviously, that’s not the case (so Pact is telling you your assumptions are wrong)

Hi Matt. Actually i found that my cointainer (jetty) had a configuration that defines application/xml has the content type by default. I've changed to application/json and could do the verification with success.