diff --git a/test/unit/tasks/seeds_test.rb b/test/unit/tasks/seeds_test.rb
index 7cc880783be..7e5e3b14849 100644
--- a/test/unit/tasks/seeds_test.rb
+++ b/test/unit/tasks/seeds_test.rb
@@ -240,7 +240,7 @@ def seed(*seed_files)
     end
 
     test 'does not change value for existing setting' do
-      Setting[:instance_id] = Foreman.uuid
+      Setting.create(name: 'instance_id', value: Foreman.uuid)
       Setting.expects(:[]=).with(:instance_id, anything).never
       seed('190-instance_id.rb')
     end