diff --git a/spec/factories/admin_user.rb b/spec/factories/admin_user.rb
index 8ee6b93b9..0714d9f1f 100644
--- a/spec/factories/admin_user.rb
+++ b/spec/factories/admin_user.rb
@@ -1,7 +1,7 @@
 FactoryGirl.define do
   factory :admin_user do
     username 'test'
-    email 'test@test.com'
+    sequence(:email) { |n| "test#{n}@test.com" }
     password 'a' * AdminUser.min_password_length
     password_confirmation { password }
     country_code 'de'