Now that Yahoo and Microsoft are not exclusive anymore -- when it comes to search, that is -- they can both work with other companies. In fact, according to The New York Times, Mayer and her team have already started testing Google search ads in a small number of desktop and mobile queries. It was first discovered by SEOBook's Aaron Wall, who alternately saw Yahoo results with Bing ads and ones with Google ads when he used different browsers. Both of them have confirmed the arrangement to NYT but wouldn't discuss the partnership in detail. "As we work to create the absolute best experiences for Yahoo users, from time to time, we run small tests with a variety of partners including search providers," was all the company said.