There is an updated pull request by paper42 against master on the void-packages repository

https://github.com/paper42/void-packages xbps-src-bootstrap-no-tests
https://github.com/void-linux/void-packages/pull/31202

xbps-src: fail on bootstrap with tests enabled
Tests pull in dependencies that are not marked as bootstrap for some packages, so if the packages have to be built, bootstrap fails.

A patch file from https://github.com/void-linux/void-packages/pull/31202.patch is attached