Abstract: A method, executed by a computer, includes receiving test data corresponding to a first microservice and a second microservice, determining, using the test data, whether the first microservice can be split, determining, using the test data, whether the first and second microservices can be merged, responsive to determining that the first microservice can be split, issuing a recommendation to split the first microservice, and responsive to determining that the first and second microservices can be merged, issuing a recommendation to merge the first microservice and the second microservice. A computer system and computer program product corresponding to the above method are also disclosed herein.