In or on

I suspect you mean "do well" ("well" is an adverb, and the phrase means to act correctly or successfully) rather than "do good" ("good" is a noun, and the phrase means to perform beneficial acts). Can we confirm that before getting to the "in" or "on" question?

The choice of "in" or "on" might depend on context. What are "they" you're referring to in 'all of them"?

Yes, what you have said is correct. I meant to perform well in or on all the tests or other requirements needed to get accepted. I wrote this short sentence to cut things down and to see which word should be used (in or on).

I am assuming both would probably work, but I am not sure.

Anonymousto perform well in or on all the tests or other requirements needed to get accepted

You have to do well on all the tests.
But you can also use in, but in a different situation. Like,
You have to do well in class.

Hope it helps.

What about if I just want to say in general:
you have to do well in or on all their requirements.

Anonymousyou have to do well in or on all their requirements.

Still on.
You have to do well on all their requirements.
But you can also say, you have to meet all their requirements.

Great. Thanks for your help.

What about the us of 'good vs well'. I am a bit confused due to good being incorrect in some cases.

you have to do good on all theirrequirements.
you have to do well on all their requirements.

why is good wrong? Is it the same as saying excellent, which does sound wrong.

Also is 'good' wrong in this sentence: you did good on the

Just remember that good is an adjective and well is an adverb.
Check this link http://data.grammarbook.com/blog/adjectives-adverbs/good-v-well/.
That should answer all your questions.

Thanks. The problem is not good with all these grammar rules. I just go with what sounds right.

Is good an adjective in bo

AnonymousIs good an adjective in both of these: you did a good job; you did good on the test.

Yeah. Adjective describes a noun. Job and test are nouns.