Mouse Test & Double Click Test

How to use the mouse test

1. Move your pointer into the dashed box. The test only listens to clicks inside it, so the side buttons won't send your browser back a page while you test.
2. Click each button you want to check at a normal, steady pace, about once or twice a second. Do 20–50 single clicks per button.
3. Scroll the wheel both ways and press it down to test the middle button.
4. Watch the Double clicks column. Every number there is a time the mouse reported a new press almost instantly after a release, which a human finger essentially can't do by accident.

To check how often your mouse reports its movement (125, 500, 1000 Hz or more), use the mouse polling rate test.

What causes a mouse to double click?

Inside each mouse button is a small mechanical switch. Over millions of clicks its metal contacts wear, oxidise or lose tension. A worn switch can "chatter": the contacts touch, separate and touch again during a single press, and the mouse reports that as two clicks. The result is files that open when you meant to select them, drag-and-drop that lets go halfway, and in games, weapons that fire twice or charged attacks that release early.

Mice deal with normal switch bounce using a "debounce" delay, ignoring any change that comes too quickly after the last one. When a switch wears out, its chatter can outlast that delay and get through.

Reading your results

• Double clicks counts presses that arrived sooner after the button was released than the threshold you set. Because it's measured from the release, it also catches switches that bounce when you let go after holding, the fault that makes drag-and-drop drop things halfway. The default of 50 ms catches nearly every switch fault while leaving room for your fastest deliberate double clicks.
• Shortest gap shows the quickest re-press after a release for that button. A worn switch often shows gaps of under 20 ms; even a fast human double click leaves around 60 ms or more between letting go and pressing again.
• If a deliberate, very fast double click gets flagged, ignore it. Test with single clicks for a clean result.
• Faults can be intermittent. If you suspect a problem but see no red flags, keep clicking for a minute, or try pressing and releasing slowly, which is when worn switches tend to chatter.

How to fix a mouse that double clicks

1. Rule out software first. Make sure Windows or macOS isn't set to a single-click-to-open mode, and that your mouse software doesn't have a macro on that button.
2. Raise the debounce time. Many gaming mice let you set the debounce or "click response" time in their companion app. A higher value can hide minor chatter, at the cost of a few milliseconds of click delay.
3. Update the firmware. Mouse makers sometimes release firmware that improves debounce handling.
4. Clean it. A short blast of compressed air around the button edges sometimes helps if dirt is the cause.
5. Use the warranty. Double clicking is a well-known hardware fault. If your mouse is under warranty, a screenshot of this test's results is useful evidence for a replacement.
6. Replace the switch or the mouse. Hobbyists replace switches with a soldering iron, which voids warranties. For most people, a new mouse is the practical fix, ideally one with optical switches, which don't suffer from contact chatter.

Frequently asked questions

Does the Windows double-click speed setting fix this?

No. That setting controls how quickly two clicks must happen to count as a double click when you do it on purpose. It doesn't stop a faulty switch from sending an extra click.

Why don't my side buttons show up?

Some mice send side buttons as keyboard shortcuts, or their software remaps them. Reset the buttons to their defaults in the mouse software and try again. A few browsers on some systems don't report side buttons at all.

Can I test a laptop touchpad?

Yes, physical clicks and taps on the touchpad are tested like mouse clicks. Two-finger taps usually register as a right click.

Is this related to a high CPS score?

Yes. A mouse that double clicks will inflate your CPS test score. If your CPS is suddenly much higher than usual with normal clicking, test the mouse here.