diff --git a/t/db_dependent/Koha/Biblio.t b/t/db_dependent/Koha/Biblio.t
index 0cd7491d15..7cdf7989cc 100755
--- a/t/db_dependent/Koha/Biblio.t
+++ b/t/db_dependent/Koha/Biblio.t
@@ -39,6 +39,7 @@ use Koha::Exception;
 use MARC::Field;
 use MARC::Record;
 
+use t::lib::Dates;
 use t::lib::TestBuilder;
 use t::lib::Mocks;
 use Test::MockModule;
@@ -591,6 +592,12 @@ subtest 'to_api() tests' => sub {
     plan tests => ( scalar keys %{$biblioitem_api} ) + 4;
 
     foreach my $key ( keys %{$biblioitem_api} ) {
+        if ( $key eq 'timestamp' ) {
+            t::lib::Dates::compare(
+                $biblio_api->{$key}, $biblioitem_api->{$key},
+                "$key is added to the biblio object"
+            );
+        }
         is( $biblio_api->{$key}, $biblioitem_api->{$key}, "$key is added to the biblio object" );
     }