During February 2026, Manpreet Singh focused on stabilizing GroupBy snippet tests in the apache/beam repository, addressing reliability issues in the data processing pipeline. He implemented targeted fixes using Python and Apache Beam, such as correcting test scoping by moving test functions inside the Pipeline context and ensuring missing entries were consistently present across all snippet files. Singh also improved test validation by comparing Row objects directly and refined code quality through formatting and linting adjustments. His work enhanced the reliability of automated testing, reduced false negatives in CI feedback, and provided clearer documentation for future contributors working with Beam testing.