Mouse test

Check that clicks, double-clicks, and the wheel behave, and catch a double-click fault.

What is a double-click fault?

One press, two clicks. As a mouse switch wears out, the contact bounces for a fraction of a millisecond and sends the signal twice. In practice it means a file opens when you meant to drag it, or a whole word gets selected when you meant to place the cursor.

Before you start

Connect the mouse you want to test and keep your hand off the trackpad so the two don't mix.
Turn off any macro or button-remapping software for the duration.
On a wireless mouse, check the battery. A weak one drops clicks all by itself.

Please run this test on a computer

You need a larger screen with a keyboard and mouse for an accurate check. Open this same address on your computer.

Already have a keyboard and mouse plugged in? Run it here.

Click, double-click, and scroll inside the gray panel below.

Use this area

Left click— not yet
Right click— not yet
Middle click (if your mouse has one)— not yet
Double click— not yet
Scroll up— not yet
Scroll down— not yet

Did everything above behave the way you intended?

Results stay on this screen and are not saved.

Not sure what the result means?Mouse or trackpad not working — frozen, jumpy, dead clicks

How to read the detection

There's a floor to how fast a human finger can click twice on purpose. Two clicks arriving far below it almost certainly came from the switch rather than your hand. One hit alone isn't a verdict, though. Press repeatedly and see whether it keeps happening. Three or four times out of ten is a reproducible symptom.

ReturnCheck reports this as suspected, never as "broken". How often it reproduces is what should drive your decision.

Also worth checking

Scroll reversal — the page jumping up when you scroll down
Dead scroll — a stretch of the wheel that does nothing
Drag drops — the button releasing mid-drag
Middle button — a wheel press that doesn't always take

Before you decide on a return

If the double-click speed in your system settings is set very slow, a perfectly good mouse behaves strangely. Connecting it to another computer and seeing whether the symptom follows settles hardware versus settings for good.

Checking a whole machine?

Run every browser check in one flow instead of opening them one at a time.

Start the full check

Keep going with another checkRefresh rate test