diff --git a/t/db_dependent/api/v1/holds.t b/t/db_dependent/api/v1/holds.t
index 9f13cb3a4d..728de95644 100755
--- a/t/db_dependent/api/v1/holds.t
+++ b/t/db_dependent/api/v1/holds.t
@@ -17,7 +17,8 @@
 
 use Modern::Perl;
 
-use Test::More tests => 16;
+use Test::More tests => 17;
+use Test::NoWarnings;
 use Test::MockModule;
 use Test::Mojo;
 use t::lib::TestBuilder;
@@ -199,6 +200,10 @@ subtest "Test endpoints with permission" => sub {
 
     plan tests => 45;
 
+    # Prevent warning 'No reserves HOLD_CANCELLATION letter transported by email'
+    my $mock_letters = Test::MockModule->new('C4::Letters');
+    $mock_letters->mock( 'GetPreparedLetter', sub { return } );
+
     $t->get_ok("//$userid_1:$password@/api/v1/holds")->status_is(200)->json_has('/0')->json_has('/1')->json_hasnt('/2');
 
     $t->get_ok("//$userid_1:$password@/api/v1/holds?priority=2")->status_is(200)