http://www.techradar.com/news/android-oreo-beta-is-now-available-for-the-nokia-8

We already knew the Nokia 8 – along with the rest of the new Nokia range - would be updated to Android Oreo, but now it’s one step closer to happening, as a beta version of Android Oreo has been launched for the handset.

A newly launched service called Nokia phones beta labs allows Nokia 8 users to sign up to beta test Android Oreo software and give direct feedback on their experience.