I understood that I should return only the films that have not been rented this month, rather than returning every film rented before last month

nope, your query is wrong: where condition is incorrect, it requires more sophisticated logic

should have 25 rows
expected 25 rows, got 308 rows

I'm getting this error. I think the code works fine.

worked thanks

I want to see the spoiler. I am also encountering the same error.

true

tests are not dynamic there are new links in urls