diff --git a/mozilla/layout/html/tests/style/bugs/bug348809-14.html b/mozilla/layout/html/tests/style/bugs/bug348809-14.html
new file mode 100644
index 00000000000..fdb2b19220f
--- /dev/null
+++ b/mozilla/layout/html/tests/style/bugs/bug348809-14.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+<html>
+<head>
+<style>
+span { color: green }
+:default:checked + span { color: red }
+input { display: none }
+</style>
+
+<body onload='document.getElementById("foo").removeAttribute("checked");'>
+<input type="checkbox" checked="checked" id="foo"><span>There should be no red</span>
+</body>
+</html>
diff --git a/mozilla/layout/html/tests/style/bugs/rtest.lst b/mozilla/layout/html/tests/style/bugs/rtest.lst
index 127a180a111..f1e03245a5d 100644
--- a/mozilla/layout/html/tests/style/bugs/rtest.lst
+++ b/mozilla/layout/html/tests/style/bugs/rtest.lst
@@ -17,3 +17,4 @@ bug348809-10.html
 bug348809-11.html
 bug348809-12.html
 bug348809-13.html
+bug348809-14.html
