Last modified: 2014-04-28 11:38:16 UTC
When I attempted to move a page (using Special:MovePage) on test.wikipedia.org to the Draft namespace, (the page in question was https://test.wikipedia.org/wiki/Acme_Corporation), there was no option in the dropdown for "Draft" or "Draft talk".
Also see bug 60709
There ain't no Drafts: namespace on test wiki.