Hello Hans The earlier message in this thread mentioned that Debian Testing is "frozen". You'll find more information about what this means here: https://release.debian.org/stretch/freeze_policy.html though that document is really written for people who are familiar with Debian development. I'm not sure whether there's a document for those less familiar with the release process.
In short, "debian testing" isn't getting new versions of software right now, and hasn't for some months, as a step towards making Stretch the next stable release of Debian. Only once Stretch is released will "testing" (which will then be known by the codename "Buster") start getting new versions from "unstable". Jeff