Double Click Test

About the Double Click Test

The Double Click Test checks each mouse button for the fault that makes files open when you meant to select them and drags start when you meant to click: one press arriving as two.

What it measures

For every button separately, the test records the time from releasing the button to its next press. A worn or dirty switch that bounces produces a very short gap there — often a few milliseconds — whether it bounces as it closes or as it opens. The test flags a gap under 60 milliseconds as a rapid re-click. It also ignores touch and pen taps, because those are not mouse switches.

Why a single flag is not a verdict

Click slowly and deliberately and a gap that short almost always comes from the switch. But a deliberate fast double click can come close, especially from someone used to clicking quickly. What separates a failing switch is repetition: the same button producing rapid re-clicks again and again when you are clicking slowly.

If a button fails

• Check whether your mouse software has a debounce or “click response” setting; raising it hides the symptom, at the cost of a little delay.
• Compressed air, or contact cleaner worked into the switch, can clear it for a while.
• The lasting fix is replacing the switch. On many mice that is a small soldering job; on some it is a warranty claim.

Related checks

• Mouse Test — every button and the scroll wheel.
• Mouse Polling Rate Test — how often the mouse reports movement.
• Key Chatter Test — the same fault on a keyboard switch.

Where this tool stops

This measures what reaches the browser. If your mouse software already applies a long debounce, a failing switch can be hidden from this test as well as from your applications. On some browsers the Back and Forward side buttons are used for navigation, so the test blocks that while you click inside it.