Preheat air fryer to 400 degrees F.
In a medium bowl, toss green beans with oil, salt and pepper.
Place green beans in the air fryer (optional: you can put them on parchment or foil if you prefer for easier clean up, but they won't get as crispy) and cook for 5-10 minutes, checking at 5 minutes and adding time until they are cooked to your liking.
Taste and adjust seasonings as desired before serving.
