Symfony applications rarely live alone. They communicate with payment providers, identity services, messaging platforms, AI APIs, and countless external systems. But as these integrations grow, testing them becomes increasingly difficult: too many mocks, fragile fixtures, outdated assumptions, and tests that no longer reflect reality.

In this talk, we will explore modern approaches to testing HTTP integrations in Symfony applications. We will go beyond traditional mocking strategies and discover how to build tests that are both reliable and maintainable.

Using Symfony HttpClient as a foundation, we will look at practical techniques to improve the developer experience: from controlling HTTP responses, to recording and replaying real interactions, to validating that our application still respects external API contracts.

You will learn how to design a testing strategy that gives confidence without sacrificing speed, making your integrations easier to evolve and safer to maintain.