A key driver for architectures based on microservices is independent evolvability of services. For example, when two services depend on each other, the testing process for one usually involves stubs and mocks for the other one. These can be written by hand, but as with mocking in unit tests, a framework helps developers focus on the actual test scenario. We have known of WireMock for a while but we’ve preferred running tests with mountebank. Over the past year, though, WireMock has really caught up and we now recommend it as a good alternative.