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diff --git a/testing/web-platform/tests/custom-elements/v0/instantiating/extensions-to-document-interface/create-element-type-is-a-local-name.html b/testing/web-platform/tests/custom-elements/v0/instantiating/extensions-to-document-interface/create-element-type-is-a-local-name.html
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+++ b/testing/web-platform/tests/custom-elements/v0/instantiating/extensions-to-document-interface/create-element-type-is-a-local-name.html
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+<!DOCTYPE html>
+<html>
+<head>
+<title>Document.createElement() and Document.createElementNS() create custom element of type, specified by single localName argument</title>
+<meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
+<meta name="assert" content="Let TYPE be typeExtension, or localName if typeExtension is not present">
+<link rel="help" href="http://www.w3.org/TR/custom-elements/#extensions-to-document-interface-to-instantiate">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../../testcommon.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<script>
+test(function() {
+    var doc = newHTMLDocument();
+    var name = 'x-a';
+    var GeneratedConstructor = doc.registerElement(name);
+    var customElement = doc.createElement(name);
+
+    assert_equals(Object.getPrototypeOf(customElement), GeneratedConstructor.prototype,
+        'Custom element type should be the local name of the custom element');
+}, 'Test Document.createElement() creates custom element of type, ' +
+    'specified by single localName argument');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var name = 'x-b';
+    var GeneratedConstructor = doc.registerElement(name);
+    var customElement = doc.createElementNS(HTML_NAMESPACE, name);
+    assert_equals(Object.getPrototypeOf(customElement), GeneratedConstructor.prototype,
+        'Custom element type should be the local name of the custom element');
+}, 'Test Document.createElementNS() creates custom element of type, ' +
+    'specified by localName argument. Argument typeExtension is not passed');
+</script>
+</body>
+</html>