diff --git a/test/unit/ticket_number_test.rb b/test/unit/ticket_number_test.rb
index d708aee70..6d41f8651 100644
--- a/test/unit/ticket_number_test.rb
+++ b/test/unit/ticket_number_test.rb
@@ -60,6 +60,9 @@ class TicketNumberTest < ActiveSupport::TestCase
 
   test 'number check' do
     Setting.set('ticket_number_increment', { checksum: false, min_size: 5 })
+
+    Setting.set('system_id', 1)
+
     ticket = Ticket.create!(
       title: 'test 1',
       group: Group.lookup(name: 'Users'),
@@ -134,6 +137,8 @@ class TicketNumberTest < ActiveSupport::TestCase
     Setting.set('ticket_number', 'Ticket::Number::Date')
     Setting.set('ticket_number_date', { checksum: false })
 
+    Setting.set('system_id', 1)
+
     ticket = Ticket.create!(
       title: 'test 1',
       group: Group.lookup(name: 'Users'),