Make sure to read this post before raising a thread here:
Then tell us:
Typescript
typescript:S2699 - Tests should include assertions
Some of our tests have been identified as not containing assertions. They do contain assertions but the use of the not operator makes them appear as invalid. It seems the rule only gets highlighted on test files which happen to import from ‘supertest’, which aligns with the rule description.
There’s a rather broad ticket here (JS-627) that I think covers what you’ve pointed out is missing here. In any case I’ve linked this thread to that ticket.