Test mouse buttons, double-clicks, and polling rate

Start with one symptom

Use a physical mouse on a desktop browser. Test one action at a time: an unexpected extra click, a dropped drag, or an uneven scroll. Browser tests show input delivered to the page; they cannot certify the condition of the hardware.

Check buttons, scrolling, and dragging

1. Open Mouse Test and press each button in the button test area. Compare the highlighted button with the one you pressed.
2. Use the double-click panel to compare deliberate single and double clicks and their intervals. Repeat slowly if an extra click appears.
3. Hold and drag the tile between the target boxes. A lost hold is worth comparing in another application before blaming the switch.
4. Move the wheel inside the scrolling area, then draw in the movement area to look for gaps or sudden jumps.
5. Use the CPS panel for clicks per second and the polling panel while moving the mouse continuously. Repeat under similar conditions when comparing results.

Read the polling-rate number correctly

The browser estimates event frequency, not the raw USB report rate. Operating-system scheduling, event coalescing, browser limits, and device settings can change the number. A reading below the mouse's advertised Hz is not, by itself, a fault.

For inconsistent results, compare the same mouse with another port or surface and check its configured report rate. Avoid changing several variables at once.

Common questions