Man pages matching name ztest in section 1:

ztest.1.en	debian 10 / zfs-test
ztest.1.en	debian 10 / zutils
ztest.1.en	debian 11 / zfs-test
ztest.1.en	debian 11 / zutils
ztest.1.en	debian 12 / zfs-test
ztest.1.en	debian 12 / zutils