This goes well as long as you're importing from a different APEX instance than what you exported from.
In case you are running your TEST environment on the same database (and APEX instance) as your development instance, when you try to import the feedback you might get following error:
ORA-00001: unique constraint (APEX_040200.WWV_FLOW_FEEDBACK_PK) violated
It's a known limitation of APEX. The way to get around it is to export the feedback from TEST to a file (see first step), purge the data in that environment (TEST) and after that you can import it in your DEV environment.
You find the Purge Data under Team Development - Utilities (Team Actions on the right side):
The import will work fine in your DEV environment. But be careful you are in the right environment, because once you purged the feedback in one environment you can't import it anymore in that environment. When you try doing that, you get following error: