diff --git a/test/unit/helpers/application_helper_test.rb b/test/unit/helpers/application_helper_test.rb
index c1b30c5f0..a8b7edea5 100644
--- a/test/unit/helpers/application_helper_test.rb
+++ b/test/unit/helpers/application_helper_test.rb
@@ -107,7 +107,9 @@ class ApplicationHelperTest < HelperTestCase
       '"link (Link title with "double-quotes")":http://foo.bar' => '<a href="http://foo.bar" title="Link title with &quot;double-quotes&quot;" class="external">link</a>',
       "This is not a \"Link\":\n\nAnother paragraph" => "This is not a \"Link\":</p>\n\n\n\t<p>Another paragraph",
       # no multiline link text
-      "This is a double quote \"on the first line\nand another on a second line\":test" => "This is a double quote \"on the first line<br />\nand another on a second line\":test"
+      "This is a double quote \"on the first line\nand another on a second line\":test" => "This is a double quote \"on the first line<br />\nand another on a second line\":test",
+      # mailto link
+      "\"system administrator\":mailto:sysadmin@example.com?subject=redmine%20permissions" => "<a href=\"mailto:sysadmin@example.com?subject=redmine%20permissions\">system administrator</a>",
     }
     to_test.each { |text, result| assert_equal "<p>#{result}</p>", textilizable(text) }
   end