diff --git a/actionmailer/test/fixtures/helpers/example_helper.rb b/actionmailer/test/fixtures/helpers/example_helper.rb
index d66927aa60..f6a6a49ced 100644
--- a/actionmailer/test/fixtures/helpers/example_helper.rb
+++ b/actionmailer/test/fixtures/helpers/example_helper.rb
@@ -1,5 +1,5 @@
 module ExampleHelper
   def example_format(text)
-    "<em><strong><small>#{text}</small></strong></em>"
+    "<em><strong><small>#{h(text)}</small></strong></em>".html_safe!
   end
 end