The apparition driver does not support "scroll_by" without going through "execute_script", but we can better express the intention of this test and make the scrolling action a bit more general by replacing "scroll a bit" with "scroll to [some element]" — in this case, we need to scroll until the "Change" button is visible so that we can press it.
This change_settings.feature spec is the only place that used "I scroll a bit".