Chicken Cacciatore with Cremini Mushrooms

In a 5-quart slow cooker, stir together chicken, mushrooms, tomatoes, flour, wine, celery, onion, rosemary, 2 teaspoons salt, and 1/4 teaspoon pepper.

Cover; cook on high setting until meat is tender, 4 hours. Do not lift the cover of the slow cooker while cooking. To serve, discard rosemary sprig.