Comment by edraferi

>The test suite is down, and has been for at least a year

Yeah, that's lame. According to the Github issue it's been down since March 2019 [0]

OP wrote an unofficial Activity Streams test suite [1] to fill the gap [2].

[0] https://github.com/w3c/activitypub/issues/337

[1] https://github.com/go-fed/testsuite

[2] https://mastodon.technology/@cj/104519578501508322

edit: link correction