The invention relates to a computer-implemented system and method for service level testing and regression. The method may comprise the steps of automatically intercepting service requests from users; storing the service requests in a test database; generating a set of service request test cases from the service requests, wherein the test cases represent substantially all forms of service requests but eliminate redundant service requests, e.g., those that are different only due to input data; executing service testing using all of the test cases; and generating a report of results from the service testing. The step of executing service testing may comprise testing of an earlier code version to generate a baseline response and testing a current code version to generate a target response. The step of generating a report may comprise generating a regression test report that includes the baseline response and the target response for the test cases.