In 2022, Multicore OCaml became reality. Programming on multiple threads brings new possibilities, but also new complexities. In order to foster confidence in OCaml 5 and retain OCaml's reputation as a trustworthy and memory-safe platform, Tarides has developed multicoretests: Two property-based testing libraries with a test suite built on top. This effort has successfully pinpointed a range of issues and contributed towards a stable multicore environment for the OCaml community to build on. ...