Why do Jews call the Hebrew Bible Tanakh? Why do they not call the Hebrew Bible the Old Testament?

The Jewish people call the Hebrew Bible the Tanakh because Tanakh is an acronym for the three divisions of the Hebrew Bible; Torah, Nevi'im, and Ketuvim. They do not call the Hewbrew Bible the Old Testament because the Hebrew Bible does not have an old and new testament. They believe that the Messiah has yet to come, so the New Testament is not relevant to their faith, and the name of the Old Testament is not relevant,