Back up and restore of a SP site (not site collection)

I have a live site collection, in which is a site I want to create a test site for. I have created a web application and a site collection, now what I want to do is take a back up of the site in the live site collection and restore it to the new site collection. This site I want to back up contains custom workflows and custom lists also which I want to be restored to the new site collection. Is this possible to do? I read that you should only use export/import if its ootb lists and workflows otherwise it doesn't do well restoring them.