@w4rner Test blogs aren't automatically blocked from search engines, but I agree that's a good idea. I'll make that change. In the meantime, it is possible to create a custom robots.txt using a theme. (In practice, if you never link to the test blog, search engines won't know about it anyway.)
@manton guessing that's why it wasn't logged. As you'll probably have noticed, I'm of midway technical ability between doing a custom theme and wanting to stretch normal stuff. Probs a good persona for if you want to 'cross the gap' and take micro.blog mainstream XD that's my excuse at lelast! Trying to ride out MB's growth without resorting to custom themes, so thanks for implementing this feature!