Usually you don't test a single change before merging, but branch from master, merge any number of changes and then run the tests. So the master branch would mo

Usually you don't test a single change before merging, but branch from master, merge any number of changes and then run the tests. So the master branch would move forward every 20-30 hours in this case, unless the tests of a merge batch fail, in which case master would kinda stall for a bit.