use t::lib::TestBuilder;
use t::lib::Mocks;
-use C4::Circulation;
-use C4::Letters;
-use C4::Members;
+use C4::Circulation qw( AddIssue AddReturn );
+use C4::Letters qw( GetPreparedLetter );
+use C4::Members qw( IssueSlip );
use C4::Biblio;
use Koha::Database;
use Koha::DateUtils;