During March 2026, Xiao Liu focused on improving test quality within the apache/hbase repository, specifically targeting the TableSnapshotInputFormat component. He refactored the associated test class using Java and JUnit, updating assertions for greater clarity and consistency while simplifying snapshot name handling by deriving it from the test method name. This approach aligned the tests with evolving project requirements, notably the HBASE-29968 Addendum, ensuring compatibility with recent changes. By emphasizing maintainability and reducing the risk of regressions in snapshot-related functionality, Xiao Liu’s work enhanced CI feedback cycles and demonstrated a strong grasp of Hadoop, MapReduce, and unit testing best practices.