1 files changed, 19 insertions, 0 deletions
diff --git a/testing/web-platform/tests/svg/struct/UnknownElement/interface.svg b/testing/web-platform/tests/svg/struct/UnknownElement/interface.svg
new file mode 100644
index 0000000000..987f20c5e4
--- /dev/null
+++ b/testing/web-platform/tests/svg/struct/UnknownElement/interface.svg
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:h="http://www.w3.org/1999/xhtml"
+     version="1.1"
+     width="100%" height="100%" viewBox="0 0 400 400">
+<title>Interface of unknown element</title>
+<h:link rel="help" href="https://svgwg.org/svg2-draft/struct.html#UnknownElement"/>
+<h:script src="/resources/testharness.js"/>
+<h:script src="/resources/testharnessreport.js"/>
+
+<foobar id="target"/>
+
+<h:script><![CDATA[
+test(function() {
+    var e = document.getElementById("target");
+    assert_equals(Object.getPrototypeOf(e), SVGUnknownElement.prototype);
+});
+]]></h:script>
+</svg>