Testino's personal art collection has been the subject of two exhibitions. The first, Somos Libres in 2013 was at MATE - Museo Mario Testino in Lima, Peru. The second installation in 2014, Somos Libres II took place at the Pinacoteca Giovanni e Marella Agnelli in Turin, Italy. His relationship with fine art developed through frequent visits to galleries and artists studios, and he has collaborated to create works with artists such as Keith Haring, Vik Muniz, John Currin and Julian Schnabel.
In July 2013, Testino opened his first non-profit association in Barranco, Lima. Museo Mario Testino was established to act as a dynamic platform for Peruvian art through the cultivation and promotion of culture and heritage.