diff --git a/t/db_dependent/Overdues.t b/t/db_dependent/Overdues.t
index 13da09b341..af719faf76 100755
--- a/t/db_dependent/Overdues.t
+++ b/t/db_dependent/Overdues.t
@@ -1,7 +1,7 @@
 #!/usr/bin/perl;
 
 use Modern::Perl;
-use Test::More tests => 17;
+use Test::More tests => 18;
 use Test::Warn;
 
 use C4::Context;
@@ -84,6 +84,11 @@ is_deeply( $mtts, ['print', 'sms', 'email'], 'GetOverdueMessageTransportTypes: t
 
 # Test GetBranchcodesWithOverdueRules
 $dbh->do(q|DELETE FROM overduerules|);
+
+my @overdue_branches;
+warnings_are { @overdue_branches = C4::Overdues::GetBranchcodesWithOverdueRules(); } [],
+    "No warnings thrown when no overdue rules exist";
+
 $dbh->do(q|
     INSERT INTO overduerules
         ( branchcode,categorycode, delay1,letter1,debarred1, delay2,letter2,debarred2, delay3,letter3,debarred3 )
@@ -93,7 +98,7 @@ $dbh->do(q|
 
 my @branchcodes = map { $_->branchcode } Koha::Libraries->search->as_list;
 
-my @overdue_branches = C4::Overdues::GetBranchcodesWithOverdueRules();
+@overdue_branches = C4::Overdues::GetBranchcodesWithOverdueRules();
 is_deeply( [ sort @overdue_branches ], [ sort @branchcodes ], 'If a default rule exists, all branches should be returned' );
 
 $dbh->do(q|