I've been taking a bunch of tests to qualify for a transcription job. They're not easy and I need a perfect score to pass. I finally failed one of the tests but managed to pass it on the retry.
They're really picky about their style guide. Fortunately, it basically amounts to syntax rules and I've been dealing with compilers that are equally picky about syntax for decades.
It also helps that all throughout my schooling my mother worked at the local university proofreading research scientists' papers and she insisted on proofreafing all my essays too.
I never thought I'd end up being happy about that.