so the multiple unit tests don't stomp on each other. This fixes a couple of things in my earlier attempt (*) actually set the env variable on Windows (*) don't use a global variable to test the env var, because that variable might be initialised BEFORE the env var is actually set Change-Id: Id43a1dd2fbd324691e0b6578c9026b8a523012e8 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/121436 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>