Facebook Messenger: Dark mode is currently being tested

More and more apps and services are being given dark mode at the request of users. Facebook is now testing one of these for Facebook Messenger as well.
A dark mode extends the battery life, especially in smartphones with an AMOLED display, is easy on the eyes, especially in dark surroundings, and can also look pretty good (at least that's how I think). That is why more and more services are implementing a dark mode in their own apps. Now Facebook is also testing such a dark mode for the Facebook Messenger app on Android and iOS.
Not quite complete at the moment
App teardown expert Jane Manchun Wong drew attention to the test phase of the dark mode with a tweet that caught the attention of colleagues from Android Police. She writes that the design is currently being tested in only a few countries and that it is not quite complete yet. So white elements can still appear. It is not known which countries will participate review phase.
Facebook Messenger, apparently due to prolonged external nagging, has started public testing Dark Mode in certain countries
They have put up a fair warning that Dark Mode isn't everywhere yet so don't complain when some UI burns your eyes off
previously: https://t.co/9fCvbYXS5Z pic.twitter.com/wF3w5hsHfh
- Jane Manchun Wong (@wongmjane) December 31, 2018
If you live in a country that is taking part in the dark mode tests, the option to activate it will appear on the profile page in Messenger. I live in Austria and couldn't find any such switch. Our colleagues at Android Police also couldn't find a button to activate the dark mode. Wong has already posted several screenshots showing what the new dark mode looks like:
Facebook Messenger is testing Dark Mode in the new UI
previously: https://t.co/vT6WoKikPm pic.twitter.com/A6ETE45BPN
- Jane Manchun Wong (@wongmjane) October 5, 2018