This blog describes the design and development of the test framework, FIT (Framework for Integrating Tests), for Couchbase transactions in a distributed environment. The framework aims to address issues such as redundancy, error verification, version management, and parallel transactions across multiple SDKs. The framework consists of two main parts: the driver, which handles test preparation, result validation, and abstract test execution, and the performer, which executes the actual test operations. The driver and performer interact through a gRPC protocol, allowing for flexible and scalable testing. The framework's design enables efficient test automation, supports test-driven development (TDD), and helps resolve issues such as concurrency and error handling. By reusing the same driver application across multiple SDKs, developers can focus on adding new features while maintaining consistency in their tests.