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We’d love to hear from you, whether you found a bug, spotted an outdated instruction or want a new test.

To help us fix a problem quickly, please include:

the page you were using,
your device and operating system (for example, “Windows 11 laptop” or “iPhone 15, iOS 26”),
your browser and its version, and
what you expected to happen and what happened instead.

We read every message and usually reply within a few days.