Worked on the valkey-io/valkey repository to deliver a performance-focused update that optimized replica migration testing. Using Tcl scripting and a focus on performance optimization, consolidated approximately 10,000 INCR round-trips into single SET commands, which reduced test execution time and improved the efficiency of continuous integration feedback loops. Enhanced the reliability of shutdown behavior during tests by setting the shutdown-timeout to zero, resulting in cleaner node shutdowns. This work improved the speed and reliability of migration scenario validation, lowered resource usage, and streamlined the test workflow, demonstrating a methodical approach to testing and performance improvements within the Tcl ecosystem.