REST API testing is a vital component of software development that goes beyond basic functional validation to ensure API resilience, reliability, and security. During a session led by Julio de Lima, a seasoned test automation architect, advanced strategies for REST API testing were explored, emphasizing the importance of backward compatibility, adhering to the REST architectural style, token structure and validation, stimulating external services, and contract and security testing. Julio shared insights into how to maintain backward compatibility by using versioning, adhere to REST principles like statelessness and caching, and ensure secure token formats through proper validation. He also highlighted the role of stimulating external services using mock tools and the significance of contract testing to verify API interactions with other services. Security testing, including input validation and vulnerability assessments using tools like OWASP ZAP and Burp Suite, was stressed as crucial for preventing unauthorized access. Best practices such as using consistent testing methodologies, documenting tests, employing automation tools, and collaborating with developers were recommended to enhance the testing process, ensuring that REST APIs are robust, reliable, and secure.