Worked on the grafana/prometheus repository to enhance the PromQL test suite by introducing custom storage support, enabling more flexible and targeted testing scenarios. Modified test functions to accept a storage parameter, allowing tests to run against different storage implementations and improving the suite’s adaptability for various backend configurations. Focused on Go for both the implementation and testing, updating the test harness to support storage-driven test cases. This work increased the coverage and flexibility of the test suite, making it easier for developers to validate PromQL behavior across diverse storage backends and ensuring more robust software development practices within the project.