Is it considered a bad practice to use abbreviations(e.g. CRUD) in names of test cases/test suits

I recently went on an automated testing internship. One of my test suits was named "CRUD" and they sad that it was a bad practice to put abbreviations in test cases'/suits' names, but my friend who works as a software developer said that it is ok to put an abbreviation in test's name if this abbreviation is widely-used.

My test suite was named "CRUD" and on the internship they said that naming test cases/suits like that isn't a good practice and that it would be better to come up with a name that wouldn't contain abbreviation, rename the suite to something like "Create Read Update Delete".

So is it a good or bad practice to put abbreviations inside names of test cases/test suits? Or is it just personal preference?

P.S I believe that this question is not opinion based, because there are certain naming convention and good or bad practices