Most test drives are a 10-minute loop around the block that tells you almost nothing beyond whether the car starts and steers. A structured test drive, planned before you arrive, tells you a lot more.
Ask if you can take a route you choose rather than the dealer's standard loop. A useful test drive covers a mix of surface streets, a stretch of highway if possible, and if you can find one, a rough or uneven road — smooth showroom lots and short loops hide a lot of problems.
Ask to start the car cold, if it hasn't already been running when you arrive. Cold starts reveal issues — rough idling, unusual noises, warning lights — that disappear once an engine's warmed up, which is exactly when a lot of test drives begin.
Pair your phone via Bluetooth, test the backup camera, try the seats in the position you'd normally drive, and check that any safety features (lane assist, adaptive cruise) work as expected — these are easy to skip in a short test drive but matter daily once you own the car.
After the drive, check underneath the parked car for any fresh fluid drips, and pop the hood again to see if anything looks different (steam, smell) after being driven versus sitting.
Once the drive checks out, move to the full used car inspection checklist — or a professional pre-purchase inspection — before committing.