Liqiang Huang enhanced concurrency reliability in the scala-native/scala-native repository by expanding test coverage for the ExecutorService component. Focusing on Scala and leveraging concurrent programming and unit testing skills, Liqiang unblocked and uncommented tests for CompletableFuture and Phaser, which improved validation of concurrent features. This work addressed the need for robust regression safety and better test hygiene, preparing the codebase for future concurrency-related changes. Although no major bugs were fixed during this period, the depth of the testing improvements enabled safer releases and more reliable concurrent behavior, reflecting a thoughtful approach to maintaining and evolving complex Scala-native systems.