Systems, methods, apparatuses, and computer-readable media are provided for rules execution testing using live production data. Live production authorization requests may be received at a production computing device. Production authorization decisions may be determined at the production computing device for the live production authorization requests using a set of production rules. The production authorization requests, data used to arrive at the corresponding production authorization decisions, and/or the corresponding authorization decisions may be streamed in real-time to a test device. Test authorization decisions may be determined at the test device for the received live production authorization requests using the received data used to arrive at the production authorization decisions, and using a set of test rules. Production and test authorization decisions may be compared to determine decision differences. One or more user interfaces or reports may be generated for outputting the decision differences.