# ...
use Exporter qw(import);
@EXPORT = (keys %My::Package::);  # @EXPORT instead of @EXPORT_OK
# ...

##</code><code>##

$ perl -e '
 use strict;
 use warnings;
 use My::Package;

 test("hello world\n");
 test_2("hello this is dog");
'
hello world
hello this is dog