Kyua was added to the base system in r359260. The tests(7) manpage should probably be updated because of it.
https://reviews.freebsd.org/D25339
A commit references this bug: Author: lwhsu Date: Thu Jun 25 11:41:28 UTC 2020 New revision: 362610 URL: https://svnweb.freebsd.org/changeset/base/362610 Log: Update tests(7) as kyua(1) was imported to base in r359260 PR: 247151 Reported by: 0mp Reviewed by: 0mp, asomers, bcr, emaste, markj Suggested from: brooks, ngie Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D25339 Changes: head/share/man/man7/tests.7