The rapid iteration of a product is a crucial factor for success. A key aspect that enables this process is the ability of a team to iterate quickly. In today's fast-paced technological landscape, efficient and accurate testing methods are invaluable for innovators, making integration and end-to-end tests an innovator's best friend. While some may argue that integration tests are not necessary, we believe that this perspective is outdated. In fact, we contend that with the implementation of hexagonal architecture, achieving reliable integration and end-to-end tests has never been easier, particularly with the use of ZIO.