Explore the challenges of testing serverless applications and mitigating cloud vendor lock-in through a 20-minute conference talk. Dive into the concept of hexagonal architecture and its potential to address common serverless adoption concerns. Learn whether new tools and strategies are necessary for testing serverless applications or if existing non-serverless testing methods can be applied. Examine the reality of cloud vendor lock-in and discover how well-established architectural patterns can help reduce associated risks. Gain insights into the mindset shift required for effective serverless implementation and how it impacts testing approaches.