The phrase unlimited typing test can mean that you may take repeated tests, or it can suggest a test with no time limit. Those are not the same thing. On Typerkeys, you can start another practice run, but timed tests still use a chosen duration; the custom timed-test setting supports durations up to 60 minutes. It is not an infinite-duration test.
Choose a duration that matches your goal
A short test is useful for a quick check, while a longer run can show how your pace holds over more text. Use the duration control in Test options to select a preset or apply a custom duration. Keep the same duration when comparing results, because WPM and accuracy can vary with test length and passage difficulty.
Repeat attempts without overreading the score
After a run, review WPM, accuracy, and errors, then start a new test if you want another measurement. Several similar attempts are more informative than a single personal best. Take a break if you become tired or uncomfortable; continuous typing is not required for useful practice.
When you are learning, use guided practice
If you are looking for untimed learning rather than a longer timed test, Typerkeys lessons are untimed and provide guided finger practice. Lessons and speed tests serve different purposes: lessons build technique, while a timed test measures a run under a chosen limit.