Windows 10 shows strange Test notifications

[German]Currently, users are reporting very strange notifications with test messages that appear on Windows 10. Either there's a trainee with keyboard issues on the road at Microsoft, or there's a security issue so that third parties can send notifications.

The site hothardware.com has published the story here. Basically, everything is said in the above paragraph. In the Microsoft News section, Windows 10 users are suddenly shown test messages that are at least 'strange'.

(Source: hothardware.com)

At reddit.com there is this thread, where someone's raising these notifications and asking if this could be a virus.

I just got two notifications coming from the notification tab that's in the lower right hand corner (next to the time and date). The first one popped up as "Microsoft movies – this test notification" and then 5 minutes later it popped up again as "Microsoft movies – thsi test notification". The typo was there as it popped up. I clicked on it both times and it sent me to the Microsoft News app but nothing showed up other than an error message.

Anyone else experience this? What steps should I take if it's a virus?

Several users who have received similar messages report to the thread. One then posted this image as a document.

(Source: Imgur)

A user writes that he is using Windows 10 Pro Version 1809 (OS Build: 17763.379). Here is another thread on this topic. Some users said they were so scared by the notifications that they were about to reinstall their machines. But they came across the thread mentioned above. The pop-up notifications have been reported for Windows 10 versions 1803 (April 2018 update) and 1809 (October 2018 update). Apparently the whole thing is limited to the USA – or has any of you received such a notification?