diff --git a/test/integration/lib/redmine/themes_test.rb b/test/integration/lib/redmine/themes_test.rb
index 53b30d206..2e4e2fc76 100644
--- a/test/integration/lib/redmine/themes_test.rb
+++ b/test/integration/lib/redmine/themes_test.rb
@@ -23,7 +23,7 @@ class ThemesTest < Redmine::IntegrationTest
 
   def setup
     Redmine::Themes.rescan
-    @theme = Redmine::Themes.themes.last
+    @theme = Redmine::Themes.theme('alternate')
     Setting.ui_theme = @theme.id
   end