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Apparently Gael Garcia Bernal found out that his baby-mama Argentine actress Dolores Fonzi was stepping out on him around the same time his one-year-old son was conceived and has ordered a paternity test!

Guanabee reports that a source tells TvyNovelas Gael has requested a DNA test for little Lazaro after hearing that Fonzi (love her name) was hooking up with director Luis Ortega.

Although the pair won't comment on the rumors, Dolores is currently back in Argentina with Lazaro ... and without Gael!