As software systems evolve into networks of microservices, APIs, and third-party integrations, reliable integration testing has become fundamental to ensuring stability. While unit tests validate components in isolation, integration tests verify that these components work together as intended — a crucial step for preventing failures that arise from miscommunication, inconsistent schemas, or unexpected data flows.

Modern integration testing practices give engineering teams early visibility into cross-service interactions, catching hidden regressions far before they reach production. With automated pipelines running integration suites on every commit, teams can maintain dependable interfaces, reduce friction between services, and ship features with greater confidence. In a world where dependencies change rapidly, strong integration testing ensures that your architecture remains predictable, scalable, and resilient.