Why use a custom test period?

Custom Test Periods allow you to define your own control and test date ranges when running SEO tests, giving you the flexibility to account for seasonality, longer implementation cycles, or unique business circumstances.

Use custom test periods when the default test lengths don't fit your needs, such as comparing performance year-on-year, or creating longer control and test periods to improve confidence in your results.

How to set up a custom test period

On the first test setup screen, we have the default periods of 2 - 8 weeks, on the screen where we ask you to confirm the control and test period dates. So for example, this means you can have a 4 week control period, and an 8 week test period.

To have any other time periods, use the date-picker instead on the pre-set 'Test Periods', by clicking ont he calendar icons and selecting the dates you wish. Then click 'Next':

If a test is still running and the results aren't conclusive, you can edit the test and extend the end date of it.

If the test has finished running - you can't edit the end date. The best thing to do is Copy the test, and extend the dates on that new instance of the test.

Updated on: 02/06/2026