[Maria-developers] Running tests in multi-node env

Hey guys, I am curious to know how we run tests in a multi-node environment for Mariadb. I did build/install the server based on instructions given here: https://mariadb.com/kb/en/mariadb/generic-build-instructions/ But I am curious to know how does this test runs: https://github.com/MariaDB/server/blob/2783fc7d14bc8ad16acfeb509d3b19615023f... Thanks, Sandeep