There's a merged pull request on the void-packages repository

Manual.md: require justification for make_check
https://github.com/void-linux/void-packages/pull/33574

Description:
Helps to decide if tests can be reenabled.

xlint can check that with https://github.com/Chocimier/xtools/commit/2c9348ee837703994d0f367a4bb478e6b08a519f

Alternatively, we could split make_check into per-current-value variables set to freeform text, then ban `=yes|on|1|true`  on make_check_*, nocross, lib32disabled etc.