diff --git a/test/integration/api_test/groups_test.rb b/test/integration/api_test/groups_test.rb
index 0a93735..b27a9f9 100644
--- a/test/integration/api_test/groups_test.rb
+++ b/test/integration/api_test/groups_test.rb
@@ -18,7 +18,7 @@
 require File.expand_path('../../../test_helper', __FILE__)
 
 class Redmine::ApiTest::GroupsTest < Redmine::ApiTest::Base
-  fixtures :users, :groups_users
+  fixtures :users, :groups_users, :email_addresses
 
   test "GET /groups.xml should require authentication" do
     get '/groups.xml'