Explore the challenges and opportunities of production-based testing in this thought-provoking conference talk from GOTO Chicago 2019. Discover why staging environments can never truly replicate production and learn innovative approaches to integrate testing directly into live systems. Examine the limitations of traditional staging servers, understand the benefits of feature flagging, and consider how to safely conduct integration testing in production environments. Gain insights into balancing the need for thorough testing with the realities of modern software development and deployment practices.