This is where you subscribe for the test starting 2018-05-13. This is actually a mailing list (called Ksk-roll-week-of-2018-05-13). If you subscribe, you can unsubscribe easily using instructions that will be sent in each message.
General information on the testbed can be found at the main testbed page.
Thank you for participating in the testbed. You should expect a confirmation email, followed by a first email with instructions to start participating.
If you need to contact a real human about this list, please send mail to email@example.com.