Explore how metrics can revolutionize end-to-end testing in cloud-native applications in this 33-minute conference talk by Matej Gera and Jéssica Lins from Red Hat. Discover the potential of leveraging application instrumentation beyond traditional metric collection to enhance E2E testing experiences. Learn how exposed data can provide detailed insights into application states and enable more complex testing scenarios. Examine the implementation of this framework in open-source projects like Thanos and Observatorium, and understand the benefits of integrating metrics as a first-class citizen in the E2E testing landscape. Gain practical knowledge through a demonstration and explore various test types, including unit, integration, and entry tests.