Luckily the inverted engine gives you the exact same results as you would normally find — except everything is written backwards. This is the third Google Easter Egg for 1st April 2015 (April Fool Day) along with the Pacman and #ChromeSelfie and is visible in the timezones as they enter into 1st April. Searched “test”, here is what we got

April Fool Easter Egg Google gives reverse Google - 33