Her first film role came in the 1993 movie Couples et amants. Testud has also starred in the films Couples et amants, Eternelles, Those Were the Days, Beyond Silence, Love, etc., Flammen in Paradies, The Misadventures of Margaret, Sentimental Education, Karnaval, In Heaven, La Captive, Drug Scenes, Sade, Murderous Maids, La Chambre obscure, I’m Going Home, The Chateau, Everyman’s Feast, A Loving Father, Fear and Trembling, Sole Sisters, Words in Blue, La Vie en rose, La France, Sagan, Lucky Luke, Le Bonheur de Pierre, Vengeance, Lourdes, Louise Michel, The Round Up, Mumu, Rebellion, The Scapegoat, Max, Pour une femme, and Sous les jupes des filles. Testud has won Cesar Awards for Best Actress and Most Promising Actress. She also has won awards at the European Film Awards, German Film Awards, Karlovy Vary International Film Festival, Lumiere Awards, Mons International Festival of Love Films, The Globes de Cristal Award, and Etoiles d’Or.