We are using environment variables provided by Blue Ocean Display URL plugin:

RUN_CHANGES_DISPLAY_URL=https://<jenkins-url>/job/<jobname>/<buildnumber>/display/redirect?page=changes
RUN_DISPLAY_URL=https://<jenkins-url>/job/<jobname>/<buildnumber>/display/redirect

However, when tests are failed we want to see direct link to "Tests" page in our notifications.

I've tried to append ?page=tests to RUN_DISPLAY_URL, but it doesn't work. Looks like this is not supported internally.