Advanced testing in Go is essential for ensuring both performance and reliability in applications. This module focuses on several key techniques, beginning with benchmark tests that allow developers to evaluate the performance of their code by comparing different algorithms. It then shifts to end-to-end testing for CLI applications, tackling common challenges and presenting effective methods to ensure applications behave as intended from a user's perspective. The module concludes by introducing test helpers, which streamline the testing process and alleviate some of the complexities developers face. These strategies collectively enhance the robustness of Go applications and promote better coding practices.