Explore the concept of verified fakes in software testing through this EuroPython conference talk. Delve into the advantages of using verified fake implementations for simplified testing while maintaining confidence in code behavior. Examine a case study demonstrating how to write and verify fake implementations of public APIs. Learn how to create reusable tests that validate both fake and real implementations. Discover real-world examples of verified fakes in open-source projects, including Flocker's block device backend and Eliot's memory logger. Understand the limitations of unverified mocking and the potential benefits of incorporating verified fakes in libraries like Boto and Docker-py. Gain insights into writing effective tests for public APIs and implementation details.