diff --git a/t/db_dependent/api/v1/patrons.t b/t/db_dependent/api/v1/patrons.t
index cc48b72700..9fcf3a9aec 100644
--- a/t/db_dependent/api/v1/patrons.t
+++ b/t/db_dependent/api/v1/patrons.t
@@ -23,6 +23,7 @@ use Test::Warn;
 
 use t::lib::TestBuilder;
 use t::lib::Mocks;
+use t::lib::Dates;
 
 use C4::Auth;
 use Koha::Database;
@@ -325,7 +326,13 @@ subtest 'update() tests' => sub {
         $newpatron->{patron_id} = $unauthorized_patron->to_api->{patron_id};
         $newpatron->{restricted} = $unauthorized_patron->to_api->{restricted};
         $newpatron->{anonymized} = $unauthorized_patron->to_api->{anonymized};
-        is_deeply($result->tx->res->json, $newpatron, 'Returned patron from update matches expected');
+
+        my $got = $result->tx->res->json;
+        my $updated_on_got = delete $got->{updated_on};
+        my $updated_on_expected = delete $newpatron->{updated_on};
+        is_deeply($got, $newpatron, 'Returned patron from update matches expected');
+        t::lib::Dates::compare( $updated_on_got, $updated_on_expected, 'updated_on values matched' );
+
 
         is(Koha::Patrons->find( $patron_2->id )->cardnumber,
            $newpatron->{ cardnumber }, 'Patron is really updated!');