Scroll wheel test

Scroll in the box above, then press Score this run.

The classifier only calls a tick stray when a reversal lands inside the window and the wheel then returns to the direction it had before, so changing your mind about which way to scroll never counts. Everything is counted in this tab from the events the browser hands over: nothing is uploaded, and no verdict here is a repair order. A wheel that fails this test can still be working as the manufacturer designed it with free-spinning or high-resolution modes, which produce big steps and dense ticks by intent.