User blog comment:Catinthedark/More Infobox level optimizations, two new templates/@comment-4189499-20150709064707/@comment-4189499-20150710081340

All I mean is to move the contents which are currently in sandboxes, which are testing ground, to non-sandbox templates to show that they're in a working state. So Template:Sandbox/Difficulty Colours would be moved to simply Template:Difficulty Colours to get the sandbox part out of the name of the finalised template. The effect shouldn't be any different on the final use of the main template, but the name will signal that it's a final product by removing "sandbox" from the name. It would probably be best to do that via renaming the template rather than copying the contents so as to keep the edit history. The sandboxes can then be left separate for further tinkering later without interfering with the finalised product until they're ready.

The only reason you'd need to do one last test would be to make sure the templates were renamed properly in all their places of use, and to make sure nothing was lost in the move. As in, after moving the contents of the helper templates to non-sandbox templates, change the names in your original test to point to these finalised templates, and then look over your previous test cases to check for regressions. You've already done just about all of the testing, and more bugs would be found by putting the thing live now than trying to copy all different possible situations, but it's always worth the couple of minutes spent making sure the previously test cases still give the same results.