diff --git a/test/unit/lib/redmine/safe_attributes_test.rb b/test/unit/lib/redmine/safe_attributes_test.rb
index 6a21efc..edc937f 100644
--- a/test/unit/lib/redmine/safe_attributes_test.rb
+++ b/test/unit/lib/redmine/safe_attributes_test.rb
@@ -18,6 +18,7 @@
 require File.expand_path('../../../../test_helper', __FILE__)
 
 class Redmine::SafeAttributesTest < ActiveSupport::TestCase
+  fixtures :users
 
   class Base
     def attributes=(attrs)