Setting axe_categories doesn't seem to change what axe rules are run

[backwardok]

Description

When trying to set the axe_categories param to a different value, WPT will still run the same default set of wcag2a, wcag2aa.

Related documentation: Running a test: list of parameters

Steps to reproduce

1. In the set of parameters for running a test, set axe_categories to a different value (for example, wcag2a or wcag21a,wcag21aa)
2. Run the test

Expected result

The axe checks that are run reflect the change in tags used for axe. For example, if I set wcag2a, I should not see any wcag2aa tagged checks in the results. Similarly, if I set wcag21a, I should see checks with the wcag21a tag.

Actual result

Regardless of what the axe_categories param is set to, it always returns results for the default value of wcag2a,wcag2aa