Eric Sword modernized the test suite for palantir/palantir-java-format by migrating all test assertions from Google Truth to AssertJ, focusing on improving test readability, maintainability, and CI reliability. He leveraged his expertise in Java, dependency management, and unit testing to standardize assertion styles across the codebase, adopting AssertJ’s fluent API for clearer failure messages and easier debugging. This migration reduced false positives in test runs and streamlined onboarding for future contributors. By aligning the project with modern Java testing practices, Eric enabled more maintainable and extensible tests, addressing both immediate quality concerns and long-term maintainability for the repository.