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diff --git a/dom/html/test/forms/test_validation_not_in_doc.html b/dom/html/test/forms/test_validation_not_in_doc.html
new file mode 100644
index 000000000..1500c6086
--- /dev/null
+++ b/dom/html/test/forms/test_validation_not_in_doc.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Test for constraint validation of form controls not in documents</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  var input = document.createElement('input');
+  input.required = true;
+  assert_false(input.checkValidity());
+}, "Should validate input not in document");
+
+test(function() {
+  var textarea = document.createElement('textarea');
+  textarea.required = true;
+  assert_false(textarea.checkValidity());
+}, "Should validate textarea not in document");
+</script>