diff --git a/C4/Reserves.pm b/C4/Reserves.pm
index fc76fc1344..6ed1543917 100644
--- a/C4/Reserves.pm
+++ b/C4/Reserves.pm
@@ -1157,7 +1157,7 @@ sub ModReserve {
 
         if ( defined( $suspend_until ) ) {
             if ( $suspend_until ) {
-                $suspend_until = eval { output_pref( { dt => dt_from_string( $suspend_until ), dateonly => 1 }); };
+                $suspend_until = eval { output_pref( { dt => dt_from_string( $suspend_until ), dateonly => 1, dateformat => 'iso' }); };
                 $dbh->do("UPDATE reserves SET suspend = 1, suspend_until = ? WHERE reserve_id = ?", undef, ( $suspend_until, $reserve_id ) );
             } else {
                 $dbh->do("UPDATE reserves SET suspend_until = NULL WHERE reserve_id = ?", undef, ( $reserve_id ) );
diff --git a/t/db_dependent/Holds.t b/t/db_dependent/Holds.t
index f219f879d3..8767223b06 100755
--- a/t/db_dependent/Holds.t
+++ b/t/db_dependent/Holds.t
@@ -137,7 +137,7 @@ ModReserve({
 $reserve = GetReserve( $reserve_id );
 ok( $reserve->{'priority'} eq '4', "Test GetReserve(), priority changed correctly" );
 ok( $reserve->{'suspend'}, "Test GetReserve(), suspend hold" );
-ok( $reserve->{'suspend_until'} eq '2013-01-01 00:00:00', "Test GetReserve(), suspend until date" );
+is( $reserve->{'suspend_until'}, '2013-01-01 00:00:00', "Test GetReserve(), suspend until date" );
 
 ToggleSuspend( $reserve_id );
 $reserve = GetReserve( $reserve_id );