Looking for a movie

It is about a lady in a red dress with blond hair in a pitch black room that disappears when another character walks in.In another scene a man uses lock picks to escape a room while next to a woman.The room gets darker and close sinon them while they are escaping.The man uses either a set of keys or lock picks to unlock the door.In the end credits someone says whoever is watching us is definitely testing us.I saw it in 2013.I saw a few scenes of it.It was in English and I saw it on television in color.

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