This is usually the last hurdle, not a formality
Because reference checks tend to happen right before an offer, treating this stage casually can undo weeks of successful interviewing -- the preparation is quick, but skipping it is the more common mistake.
Consistency matters more than perfection
A referee doesn't need to describe you as flawless -- what actually raises concern for an employer is a referee's account meaningfully contradicting what you said yourself, not a referee mentioning a genuine area for growth.
Frequently Asked Questions
Do employers need my consent before contacting a reference?
In most jurisdictions, employers are expected to get your consent before contacting a reference, and many will ask you directly for referee contact information as part of the process rather than reaching out independently.
What if I'm not on good terms with my direct former manager?
A former colleague or a manager from a different team you collaborated closely with can serve just as well as a referee, as long as they can speak concretely and objectively about your actual work.