Let's see what the documentation for Exporter has to say...

       Specialised Import Lists
 
       If the first entry in an import list begins with !, : or /
       then the list is treated as a series of specifications
       which either add to or delete from the list of names to
       import. They are processed left to right. Specifications
       are in the form:
 
           [!]name         This name only
           [!]:DEFAULT     All names in @EXPORT
           [!]:tag         All names in $EXPORT_TAGS{tag} anonymous li
+st
           [!]/pattern/    All names in @EXPORT and @EXPORT_OK which m
+atch

       A leading ! indicates that matching names should be
       deleted from the list of names to import.  If the first
       specification is a deletion it is treated as though
       preceded by :DEFAULT. If you just want to import extra
       names in addition to the default set you will still need
       to include :DEFAULT explicitly.
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The last sentence there reveals the solution. To import all the @EXPORT names and some @EXPORT_OK names, you would do something like this: use testpack qw(:DEFAULT &rtine);