Apple is already testing its next-generation operating systems, including iOS 10 for mobile devices and iPads, and OS X 10.12, code named “Fuji,” a new report said on Tuesday. Both operating systems began to surface in site metrics for 9to5Mac, which noticed the operating systems appearing in Google Analytics.

9to5Mac first started to see activity related to iOS 10 and OS X 10.12 beginning as early as this September, right when El Capitan and iOS 9 were launching to the public. In the last two months, however, the number of sessions coming into 9to5Mac appears to have nearly quadrupled. That suggests that there are a larger number of people testing the new operating systems, which likely won’t launch until next September. Apple will probably unveil the new operating systems a few months earlier, however, around its WWDC conference that usually kicks off in June.

No word yet on what sort of features are coming, but 9to5Mac will likely provide plenty of details on that front, too.