Update: The Network Test has been officially revealed. It is up for download on PS4 and Xbox during May 1-8, 2018, and will be playable during May 11-12, 2018 from 6:00 PM PST to 12:00 AM PST. You can download the Network Test on the PlayStation Network Store and the Xbox Store.
Yikes…again. As you may have heard, Dark Souls Remastered for Nintendo Switch was delayed until Summer 2018 (other versions are still releasing on May 25, 2018). This is rather unfortunate, as the Switch version was recently shown off to the public and played fine. The reasons for the delay appear to be unknown.
Anyways, as it turns out, the Network Test is coming soon! However, the Switch Network Test will also be delayed too.
We will test the server performance of the Switch version apart from the others, and at a time closer to the Switch release. We will announce the dates when they are available.
— Dark Souls (@DarkSoulsGame) April 17, 2018