Lea Haas modernized the integration testing framework for the kadai-io/kadai repository by migrating test modules from TestRestTemplate to the RestClient API. This transition improved test performance and maintainability, aligning the project with current HTTP testing practices. Working primarily in Java and leveraging Spring Boot, Lea refactored cross-module test code to enable faster, more reliable integration tests and a cleaner test suite. The update reduced maintenance overhead and accelerated continuous integration feedback cycles. Although no bugs were reported or fixed during this period, the work demonstrated depth in integration testing, test automation modernization, and issue tracking within a production codebase.