Hi.
Regarding account requests and the test wiki generally: unless there's a _really_ good reason, wikis should not restrict account creation and then rely on a public mailing list in order to request an account. It looks like the use of this extension is already tied to a specific MediaWiki user group, so I can't see any reason to restrict account creation on this test wiki. Setting up a requests page on this test wiki would be a much better approach, in my opinion.
MZMcBride