In my workflow, that would be in a feature branch, and exploratory branches can certainly break, but before I made a PR I would rebase my changes such that none of the commits broke the build.

It's also a different situation. The original one is "I've made a test that shows a problem." Your example is a surprise "I don't know whether this will pass my cloud-based tests." I would edit my branch if I had a surprise failure, since my initial code clearly wasn't correct.