The text discusses the importance of end-to-end testing in DevOps environments, where virtual machines, continuous delivery, and microservices are prevalent. End-to-end testing is necessary to ensure that information is passed between components correctly and that the system's integrity is maintained. It provides benefits such as requirements validation, regression testing, and validation of environment configuration. The text also highlights the value of end-to-end testing for business-focused teams, who can use it to confirm system stability and meet customer expectations. While engineering teams may not find direct value in writing all-encompassing end-to-end tests, they benefit from unit tests that cover individual functionality. Ultimately, well-written and comprehensive end-to-end tests are a vital component of DevOps, providing confidence in the system's stability and integration with application components.