diff --git a/test/models/site_test.rb b/test/models/site_test.rb
index 66ad25b..3cc695d 100644
--- a/test/models/site_test.rb
+++ b/test/models/site_test.rb
@@ -13,6 +13,13 @@ class SiteTest < ActiveSupport::TestCase
     assert site.destroy
   end
 
+  test 'el nombre tiene que ser único' do
+    site = create :site
+    site2 = build :site, name: site.name
+
+    assert_not site2.valid?
+  end
+
   test 'al destruir un sitio se eliminan los archivos' do
     site = create :site
     assert site.destroy