diff --git a/tests/wpt/dom/nodes/Node-appendChild-cereactions-vs-script.window.js b/tests/wpt/dom/nodes/Node-appendChild-cereactions-vs-script.window.js
new file mode 100644
index 00000000..bc0b8ad6
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-appendChild-cereactions-vs-script.window.js
@@ -0,0 +1,27 @@
+const results = [];
+test(() => {
+  class Script1 extends HTMLScriptElement {
+    constructor() {
+      super();
+    }
+    connectedCallback() {
+      results.push("ce connected s1");
+    }
+  }
+  class Script2 extends HTMLScriptElement {
+    constructor() {
+      super();
+    }
+    connectedCallback() {
+      results.push("ce connected s2");
+    }
+  }
+  customElements.define("script-1", Script1, { extends: "script" });
+  customElements.define("script-2", Script2, { extends: "script" });
+  const s1 = new Script1();
+  s1.textContent = "results.push('s1')";
+  const s2 = new Script2();
+  s2.textContent = "results.push('s2')";
+  document.body.append(s1, s2);
+  assert_array_equals(results, ["s1", "s2", "ce connected s1", "ce connected s2"]);
+}, "Custom element reactions follow script execution");
diff --git a/tests/wpt/dom/nodes/Node-appendChild.html b/tests/wpt/dom/nodes/Node-appendChild.html
new file mode 100644
index 00000000..8264cb11
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-appendChild.html
@@ -0,0 +1,59 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node.appendChild</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-appendchild">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<iframe src=about:blank></iframe>
+<script>
+// TODO: Exhaustive tests
+function testLeaf(node, desc) {
+  // WebIDL.
+  test(function() {
+    assert_throws_js(TypeError, function() { node.appendChild(null) })
+  }, "Appending null to a " + desc)
+
+  // Pre-insert step 1.
+  test(function() {
+    assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { node.appendChild(document.createTextNode("fail")) })
+  }, "Appending to a " + desc)
+}
+
+// WebIDL.
+test(function() {
+  assert_throws_js(TypeError, function() { document.body.appendChild(null) })
+  assert_throws_js(TypeError, function() { document.body.appendChild({'a':'b'}) })
+}, "WebIDL tests")
+
+// WebIDL and pre-insert step 1.
+test(function() {
+  testLeaf(document.createTextNode("Foo"), "text node")
+  testLeaf(document.createComment("Foo"), "comment")
+  testLeaf(document.doctype, "doctype")
+}, "Appending to a leaf node.")
+
+// Pre-insert step 5.
+test(function() {
+  var frameDoc = frames[0].document
+  assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { document.body.appendChild(frameDoc) })
+}, "Appending a document")
+
+// Pre-insert step 8.
+test(function() {
+  var frameDoc = frames[0].document
+  var s = frameDoc.createElement("a")
+  assert_equals(s.ownerDocument, frameDoc)
+  document.body.appendChild(s)
+  assert_equals(s.ownerDocument, document)
+}, "Adopting an orphan")
+test(function() {
+  var frameDoc = frames[0].document
+  var s = frameDoc.createElement("b")
+  assert_equals(s.ownerDocument, frameDoc)
+  frameDoc.body.appendChild(s)
+  assert_equals(s.ownerDocument, frameDoc)
+  document.body.appendChild(s)
+  assert_equals(s.ownerDocument, document)
+}, "Adopting a non-orphan")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-baseURI.html b/tests/wpt/dom/nodes/Node-baseURI.html
new file mode 100644
index 00000000..e9e9d76a
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-baseURI.html
@@ -0,0 +1,62 @@
+<!DOCTYPE html>
+<title>Node.baseURI</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+const elementTests = [
+  {
+    name: "elements belonging to document",
+    creator: () => {
+      const element = document.createElement("div");
+      document.body.appendChild(element);
+      return element;
+    }
+  },
+  {
+    name: "elements unassigned to document",
+    creator: () => document.createElement("div")
+  },
+  {
+    name: "elements belonging to document fragments",
+    creator: () => {
+      const fragment = document.createDocumentFragment();
+      const element = document.createElement("div");
+      fragment.appendChild(element);
+      return element;
+    }
+  },
+  {
+    name: "elements belonging to document fragments in document",
+    creator: () => {
+      const fragment = document.createDocumentFragment();
+      const element = document.createElement("div");
+      fragment.appendChild(element);
+      document.body.appendChild(fragment);
+      return element;
+    }
+  },
+];
+
+const attributeTests = [
+  {
+    name: "attributes unassigned to element",
+    creator: () => document.createAttribute("class")
+  },
+  ...elementTests.map(({ name, creator }) => ({
+    name: "attributes in " + name,
+    creator: () => {
+      const element = creator();
+      element.setAttribute("class", "abc");
+      return element.getAttributeNode("class");
+    }
+  }))
+];
+
+for (const { name, creator } of [...elementTests, ...attributeTests]) {
+  test(function() {
+    const node = creator();
+    assert_equals(node.baseURI, document.URL);
+  }, `For ${name}, baseURI should be document URL`)
+}
+</script>
diff --git a/tests/wpt/dom/nodes/Node-childNodes.html b/tests/wpt/dom/nodes/Node-childNodes.html
new file mode 100644
index 00000000..0d38df37
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-childNodes.html
@@ -0,0 +1,117 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node.childNodes</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-childnodes">
+<link rel=author title="Tim Taubert" href="mailto:ttaubert@mozilla.com">
+<link rel=author title="Ms2ger" href="mailto:Ms2ger@gmail.com">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<div style="display: none">
+  <ul id='test'><li>1</li><li>2</li><li>3</li><li>4</li></ul>
+</div>
+<script>
+test(function() {
+  var element = document.createElement("p");
+  assert_equals(element.childNodes, element.childNodes);
+}, "Caching of Node.childNodes");
+
+var check_parent_node = function(node) {
+  assert_array_equals(node.childNodes, []);
+
+  var children = node.childNodes;
+  var child = document.createElement("p");
+  node.appendChild(child);
+  assert_equals(node.childNodes, children);
+  assert_array_equals(children, [child]);
+  assert_equals(children.item(0), child);
+
+  var child2 = document.createComment("comment");
+  node.appendChild(child2);
+  assert_array_equals(children, [child, child2]);
+  assert_equals(children.item(0), child);
+  assert_equals(children.item(1), child2);
+
+  assert_false(2 in children);
+  assert_equals(children[2], undefined);
+  assert_equals(children.item(2), null);
+};
+
+test(function() {
+  check_parent_node(document.createElement("p"));
+}, "Node.childNodes on an Element.");
+
+test(function() {
+  check_parent_node(document.createDocumentFragment());
+}, "Node.childNodes on a DocumentFragment.");
+
+test(function() {
+  check_parent_node(new Document());
+}, "Node.childNodes on a Document.");
+
+test(function() {
+  var node = document.createElement("div");
+  var kid1 = document.createElement("p");
+  var kid2 = document.createTextNode("hey");
+  var kid3 = document.createElement("span");
+  node.appendChild(kid1);
+  node.appendChild(kid2);
+  node.appendChild(kid3);
+
+  var list = node.childNodes;
+  assert_array_equals([...list], [kid1, kid2, kid3]);
+
+  var keys = list.keys();
+  assert_false(keys instanceof Array);
+  keys = [...keys];
+  assert_array_equals(keys, [0, 1, 2]);
+
+  var values = list.values();
+  assert_false(values instanceof Array);
+  values = [...values];
+  assert_array_equals(values, [kid1, kid2, kid3]);
+
+  var entries = list.entries();
+  assert_false(entries instanceof Array);
+  entries = [...entries];
+  assert_equals(entries.length, keys.length);
+  assert_equals(entries.length, values.length);
+  for (var i = 0; i < entries.length; ++i) {
+    assert_array_equals(entries[i], [keys[i], values[i]]);
+  }
+
+  var cur = 0;
+  var thisObj = {};
+  list.forEach(function(value, key, listObj) {
+    assert_equals(listObj, list);
+    assert_equals(this, thisObj);
+    assert_equals(value, values[cur]);
+    assert_equals(key, keys[cur]);
+    cur++;
+  }, thisObj);
+  assert_equals(cur, entries.length);
+
+  assert_equals(list[Symbol.iterator], Array.prototype[Symbol.iterator]);
+  assert_equals(list.keys, Array.prototype.keys);
+  if (Array.prototype.values) {
+    assert_equals(list.values, Array.prototype.values);
+  }
+  assert_equals(list.entries, Array.prototype.entries);
+  assert_equals(list.forEach, Array.prototype.forEach);
+}, "Iterator behavior of Node.childNodes");
+
+
+test(() => {
+  var node = document.getElementById("test");
+  var children = node.childNodes;
+  assert_true(children instanceof NodeList);
+  var li = document.createElement("li");
+  assert_equals(children.length, 4);
+
+  node.appendChild(li);
+  assert_equals(children.length, 5);
+
+  node.removeChild(li);
+  assert_equals(children.length, 4);
+}, "Node.childNodes should be a live collection");
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode-XMLDocument.html b/tests/wpt/dom/nodes/Node-cloneNode-XMLDocument.html
new file mode 100644
index 00000000..2c63c775
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode-XMLDocument.html
@@ -0,0 +1,28 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Cloning of an XMLDocument</title>
+<link rel="help" href="https://dom.spec.whatwg.org/#dom-node-clonenode">
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-node-clone">
+
+<!-- This is testing in particular "that implements the same interfaces as node" -->
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  const doc = document.implementation.createDocument("namespace", "");
+
+  assert_equals(
+    doc.constructor, XMLDocument,
+    "Precondition check: document.implementation.createDocument() creates an XMLDocument"
+  );
+
+  const clone = doc.cloneNode(true);
+
+  assert_equals(clone.constructor, XMLDocument);
+}, "Created with createDocument");
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode-document-with-doctype.html b/tests/wpt/dom/nodes/Node-cloneNode-document-with-doctype.html
new file mode 100644
index 00000000..21963084
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode-document-with-doctype.html
@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Cloning of a document with a doctype</title>
+<link rel="help" href="https://dom.spec.whatwg.org/#dom-node-clonenode">
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-node-clone">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(() => {
+  const doctype = document.implementation.createDocumentType("name", "publicId", "systemId");
+  const doc = document.implementation.createDocument("namespace", "", doctype);
+
+  const clone = doc.cloneNode(true);
+
+  assert_equals(clone.childNodes.length, 1, "Only one child node");
+  assert_equals(clone.childNodes[0].nodeType, Node.DOCUMENT_TYPE_NODE, "Is a document fragment");
+  assert_equals(clone.childNodes[0].name, "name");
+  assert_equals(clone.childNodes[0].publicId, "publicId");
+  assert_equals(clone.childNodes[0].systemId, "systemId");
+}, "Created with the createDocument/createDocumentType");
+
+test(() => {
+  const doc = document.implementation.createHTMLDocument();
+
+  const clone = doc.cloneNode(true);
+
+  assert_equals(clone.childNodes.length, 2, "Two child nodes");
+  assert_equals(clone.childNodes[0].nodeType, Node.DOCUMENT_TYPE_NODE, "Is a document fragment");
+  assert_equals(clone.childNodes[0].name, "html");
+  assert_equals(clone.childNodes[0].publicId, "");
+  assert_equals(clone.childNodes[0].systemId, "");
+}, "Created with the createHTMLDocument");
+
+test(() => {
+  const parser = new window.DOMParser();
+  const doc = parser.parseFromString("<!DOCTYPE html><html></html>", "text/html");
+
+  const clone = doc.cloneNode(true);
+
+  assert_equals(clone.childNodes.length, 2, "Two child nodes");
+  assert_equals(clone.childNodes[0].nodeType, Node.DOCUMENT_TYPE_NODE, "Is a document fragment");
+  assert_equals(clone.childNodes[0].name, "html");
+  assert_equals(clone.childNodes[0].publicId, "");
+  assert_equals(clone.childNodes[0].systemId, "");
+}, "Created with DOMParser");
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode-external-stylesheet-no-bc.sub.html b/tests/wpt/dom/nodes/Node-cloneNode-external-stylesheet-no-bc.sub.html
new file mode 100644
index 00000000..bce6074a
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode-external-stylesheet-no-bc.sub.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>cloneNode on a stylesheet link in a browsing-context-less document</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<!-- Regression test for https://github.com/jsdom/jsdom/issues/2497 -->
+
+<script>
+"use strict";
+
+setup({ single_test: true });
+
+const doc = document.implementation.createHTMLDocument();
+
+// Bug was only triggered by absolute URLs, for some reason...
+const absoluteURL = new URL("/common/canvas-frame.css", location.href);
+doc.head.innerHTML = `<link rel="stylesheet" href="${absoluteURL}">`;
+
+// Test passes if this does not throw/crash
+doc.cloneNode(true);
+
+done();
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode-on-inactive-document-crash.html b/tests/wpt/dom/nodes/Node-cloneNode-on-inactive-document-crash.html
new file mode 100644
index 00000000..cbd7a1e6
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode-on-inactive-document-crash.html
@@ -0,0 +1,6 @@
+<iframe id="i"></iframe>
+<script>
+var doc = i.contentDocument;
+i.remove();
+doc.cloneNode();
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode-svg.html b/tests/wpt/dom/nodes/Node-cloneNode-svg.html
new file mode 100644
index 00000000..9d4704b0
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode-svg.html
@@ -0,0 +1,63 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Cloning of SVG elements and attributes</title>
+<link rel="help" href="https://dom.spec.whatwg.org/#dom-node-clonenode">
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-node-clone">
+<!-- regression test for https://github.com/jsdom/jsdom/issues/1601 -->
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<svg xmlns:xlink='http://www.w3.org/1999/xlink'><use xlink:href='#test'></use></svg>
+
+<script>
+"use strict";
+
+const svg = document.querySelector("svg");
+const clone = svg.cloneNode(true);
+
+test(() => {
+
+  assert_equals(clone.namespaceURI, "http://www.w3.org/2000/svg");
+  assert_equals(clone.prefix, null);
+  assert_equals(clone.localName, "svg");
+  assert_equals(clone.tagName, "svg");
+
+}, "cloned <svg> should have the right properties");
+
+test(() => {
+
+  const attr = clone.attributes[0];
+
+  assert_equals(attr.namespaceURI, "http://www.w3.org/2000/xmlns/");
+  assert_equals(attr.prefix, "xmlns");
+  assert_equals(attr.localName, "xlink");
+  assert_equals(attr.name, "xmlns:xlink");
+  assert_equals(attr.value, "http://www.w3.org/1999/xlink");
+
+}, "cloned <svg>'s xmlns:xlink attribute should have the right properties");
+
+test(() => {
+
+  const use = clone.firstElementChild;
+  assert_equals(use.namespaceURI, "http://www.w3.org/2000/svg");
+  assert_equals(use.prefix, null);
+  assert_equals(use.localName, "use");
+  assert_equals(use.tagName, "use");
+
+}, "cloned <use> should have the right properties");
+
+test(() => {
+
+  const use = clone.firstElementChild;
+  const attr = use.attributes[0];
+
+  assert_equals(attr.namespaceURI, "http://www.w3.org/1999/xlink");
+  assert_equals(attr.prefix, "xlink");
+  assert_equals(attr.localName, "href");
+  assert_equals(attr.name, "xlink:href");
+  assert_equals(attr.value, "#test");
+
+}, "cloned <use>'s xlink:href attribute should have the right properties");
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-cloneNode.html b/tests/wpt/dom/nodes/Node-cloneNode.html
new file mode 100644
index 00000000..e97259da
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-cloneNode.html
@@ -0,0 +1,346 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node.cloneNode</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-clonenode">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+function assert_equal_node(nodeA, nodeB) {
+  assert_equals(nodeB.nodeType, nodeA.nodeType, "nodeType");
+  assert_equals(nodeB.nodeName, nodeA.nodeName, "nodeName");
+
+  if (nodeA.nodeType === Node.ELEMENT_NODE) {
+    assert_equals(nodeB.prefix, nodeA.prefix, "prefix");
+    assert_equals(nodeB.namespaceURI, nodeA.namespaceURI, "namespaceURI");
+    assert_equals(nodeB.localName, nodeA.localName, "localName");
+    assert_equals(nodeB.tagName, nodeA.tagName, "tagName");
+    assert_not_equals(nodeB.attributes != nodeA.attributes, "attributes");
+    assert_equals(nodeB.attributes.length, nodeA.attributes.length,
+                  "attributes.length");
+    for (var i = 0, il = nodeA.attributes.length; i < il; ++i) {
+      assert_not_equals(nodeB.attributes[i], nodeA.attributes[i],
+                        "attributes[" + i + "]");
+      assert_equals(nodeB.attributes[i].name, nodeA.attributes[i].name,
+                    "attributes[" + i + "].name");
+      assert_equals(nodeB.attributes[i].prefix, nodeA.attributes[i].prefix,
+                    "attributes[" + i + "].prefix");
+      assert_equals(nodeB.attributes[i].namespaceURI, nodeA.attributes[i].namespaceURI,
+                    "attributes[" + i + "].namespaceURI");
+      assert_equals(nodeB.attributes[i].value, nodeA.attributes[i].value,
+                    "attributes[" + i + "].value");
+    }
+  }
+}
+
+function check_copy(orig, copy, type) {
+    assert_not_equals(orig, copy, "Object equality");
+    assert_equal_node(orig, copy, "Node equality");
+    assert_true(orig instanceof type, "original instanceof " + type);
+    assert_true(copy instanceof type, "copy instanceof " + type);
+}
+
+function create_element_and_check(localName, typeName) {
+  test(function() {
+    assert_true(typeName in window, typeName + " is not supported");
+    var element = document.createElement(localName);
+    var copy = element.cloneNode();
+    check_copy(element, copy, window[typeName]);
+  }, "createElement(" + localName + ")");
+}
+
+// test1: createElement
+create_element_and_check("a",         "HTMLAnchorElement");
+create_element_and_check("abbr",      "HTMLElement");
+create_element_and_check("acronym",   "HTMLElement");
+create_element_and_check("address",   "HTMLElement");
+create_element_and_check("area",      "HTMLAreaElement");
+create_element_and_check("article",   "HTMLElement");
+create_element_and_check("aside",     "HTMLElement");
+create_element_and_check("audio",     "HTMLAudioElement");
+create_element_and_check("b",         "HTMLElement");
+create_element_and_check("base",      "HTMLBaseElement");
+create_element_and_check("bdi",       "HTMLElement");
+create_element_and_check("bdo",       "HTMLElement");
+create_element_and_check("bgsound",   "HTMLElement");
+create_element_and_check("big",       "HTMLElement");
+create_element_and_check("blockquote","HTMLElement");
+create_element_and_check("body",      "HTMLBodyElement");
+create_element_and_check("br",        "HTMLBRElement");
+create_element_and_check("button",    "HTMLButtonElement");
+create_element_and_check("canvas",    "HTMLCanvasElement");
+create_element_and_check("caption",   "HTMLTableCaptionElement");
+create_element_and_check("center",    "HTMLElement");
+create_element_and_check("cite",      "HTMLElement");
+create_element_and_check("code",      "HTMLElement");
+create_element_and_check("col",       "HTMLTableColElement");
+create_element_and_check("colgroup",  "HTMLTableColElement");
+create_element_and_check("data",      "HTMLDataElement");
+create_element_and_check("datalist",  "HTMLDataListElement");
+create_element_and_check("dialog",    "HTMLDialogElement");
+create_element_and_check("dd",        "HTMLElement");
+create_element_and_check("del",       "HTMLModElement");
+create_element_and_check("details",   "HTMLElement");
+create_element_and_check("dfn",       "HTMLElement");
+create_element_and_check("dir",       "HTMLDirectoryElement");
+create_element_and_check("div",       "HTMLDivElement");
+create_element_and_check("dl",        "HTMLDListElement");
+create_element_and_check("dt",        "HTMLElement");
+create_element_and_check("embed",     "HTMLEmbedElement");
+create_element_and_check("fieldset",  "HTMLFieldSetElement");
+create_element_and_check("figcaption","HTMLElement");
+create_element_and_check("figure",    "HTMLElement");
+create_element_and_check("font",      "HTMLFontElement");
+create_element_and_check("footer",    "HTMLElement");
+create_element_and_check("form",      "HTMLFormElement");
+create_element_and_check("frame",     "HTMLFrameElement");
+create_element_and_check("frameset",  "HTMLFrameSetElement");
+create_element_and_check("h1",        "HTMLHeadingElement");
+create_element_and_check("h2",        "HTMLHeadingElement");
+create_element_and_check("h3",        "HTMLHeadingElement");
+create_element_and_check("h4",        "HTMLHeadingElement");
+create_element_and_check("h5",        "HTMLHeadingElement");
+create_element_and_check("h6",        "HTMLHeadingElement");
+create_element_and_check("head",      "HTMLHeadElement");
+create_element_and_check("header",    "HTMLElement");
+create_element_and_check("hgroup",    "HTMLElement");
+create_element_and_check("hr",        "HTMLHRElement");
+create_element_and_check("html",      "HTMLHtmlElement");
+create_element_and_check("i",         "HTMLElement");
+create_element_and_check("iframe",    "HTMLIFrameElement");
+create_element_and_check("img",       "HTMLImageElement");
+create_element_and_check("input",     "HTMLInputElement");
+create_element_and_check("ins",       "HTMLModElement");
+create_element_and_check("isindex",   "HTMLElement");
+create_element_and_check("kbd",       "HTMLElement");
+create_element_and_check("label",     "HTMLLabelElement");
+create_element_and_check("legend",    "HTMLLegendElement");
+create_element_and_check("li",        "HTMLLIElement");
+create_element_and_check("link",      "HTMLLinkElement");
+create_element_and_check("main",      "HTMLElement");
+create_element_and_check("map",       "HTMLMapElement");
+create_element_and_check("mark",      "HTMLElement");
+create_element_and_check("marquee",   "HTMLElement");
+create_element_and_check("meta",      "HTMLMetaElement");
+create_element_and_check("meter",     "HTMLMeterElement");
+create_element_and_check("nav",       "HTMLElement");
+create_element_and_check("nobr",      "HTMLElement");
+create_element_and_check("noframes",  "HTMLElement");
+create_element_and_check("noscript",  "HTMLElement");
+create_element_and_check("object",    "HTMLObjectElement");
+create_element_and_check("ol",        "HTMLOListElement");
+create_element_and_check("optgroup",  "HTMLOptGroupElement");
+create_element_and_check("option",    "HTMLOptionElement");
+create_element_and_check("output",    "HTMLOutputElement");
+create_element_and_check("p",         "HTMLParagraphElement");
+create_element_and_check("param",     "HTMLParamElement");
+create_element_and_check("pre",       "HTMLPreElement");
+create_element_and_check("progress",  "HTMLProgressElement");
+create_element_and_check("q",         "HTMLQuoteElement");
+create_element_and_check("rp",        "HTMLElement");
+create_element_and_check("rt",        "HTMLElement");
+create_element_and_check("ruby",      "HTMLElement");
+create_element_and_check("s",         "HTMLElement");
+create_element_and_check("samp",      "HTMLElement");
+create_element_and_check("script",    "HTMLScriptElement");
+create_element_and_check("section",   "HTMLElement");
+create_element_and_check("select",    "HTMLSelectElement");
+create_element_and_check("small",     "HTMLElement");
+create_element_and_check("source",    "HTMLSourceElement");
+create_element_and_check("spacer",    "HTMLElement");
+create_element_and_check("span",      "HTMLSpanElement");
+create_element_and_check("strike",    "HTMLElement");
+create_element_and_check("style",     "HTMLStyleElement");
+create_element_and_check("sub",       "HTMLElement");
+create_element_and_check("summary",   "HTMLElement");
+create_element_and_check("sup",       "HTMLElement");
+create_element_and_check("table",     "HTMLTableElement");
+create_element_and_check("tbody",     "HTMLTableSectionElement");
+create_element_and_check("td",        "HTMLTableCellElement");
+create_element_and_check("template",  "HTMLTemplateElement");
+create_element_and_check("textarea",  "HTMLTextAreaElement");
+create_element_and_check("th",        "HTMLTableCellElement");
+create_element_and_check("time",      "HTMLTimeElement");
+create_element_and_check("title",     "HTMLTitleElement");
+create_element_and_check("tr",        "HTMLTableRowElement");
+create_element_and_check("tt",        "HTMLElement");
+create_element_and_check("track",     "HTMLTrackElement");
+create_element_and_check("u",         "HTMLElement");
+create_element_and_check("ul",        "HTMLUListElement");
+create_element_and_check("var",       "HTMLElement");
+create_element_and_check("video",     "HTMLVideoElement");
+create_element_and_check("unknown",   "HTMLUnknownElement");
+create_element_and_check("wbr",       "HTMLElement");
+
+test(function() {
+    var fragment = document.createDocumentFragment();
+    var copy = fragment.cloneNode();
+    check_copy(fragment, copy, DocumentFragment);
+}, "createDocumentFragment");
+
+test(function() {
+    var text = document.createTextNode("hello world");
+    var copy = text.cloneNode();
+    check_copy(text, copy, Text);
+    assert_equals(text.data, copy.data);
+    assert_equals(text.wholeText, copy.wholeText);
+}, "createTextNode");
+
+test(function() {
+    var comment = document.createComment("a comment");
+    var copy = comment.cloneNode();
+    check_copy(comment, copy, Comment);
+    assert_equals(comment.data, copy.data);
+}, "createComment");
+
+test(function() {
+  var el = document.createElement("foo");
+  el.setAttribute("a", "b");
+  el.setAttribute("c", "d");
+  var c = el.cloneNode();
+  check_copy(el, c, Element);
+}, "createElement with attributes")
+
+test(function() {
+  var el = document.createElementNS("http://www.w3.org/1999/xhtml", "foo:div");
+  var c = el.cloneNode();
+  check_copy(el, c, HTMLDivElement);
+}, "createElementNS HTML")
+
+test(function() {
+  var el = document.createElementNS("http://www.example.com/", "foo:div");
+  var c = el.cloneNode();
+  check_copy(el, c, Element);
+}, "createElementNS non-HTML")
+
+test(function() {
+    var pi = document.createProcessingInstruction("target", "data");
+    var copy = pi.cloneNode();
+    check_copy(pi, copy, ProcessingInstruction);
+    assert_equals(pi.data, copy.data, "data");
+    assert_equals(pi.target, pi.target, "target");
+}, "createProcessingInstruction");
+
+test(function() {
+    var attr = document.createAttribute("class");
+    var copy = attr.cloneNode();
+    check_copy(attr, copy, Attr);
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy.localName);
+    assert_equals(attr.value, copy.value);
+
+    attr.value = "abc";
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy.localName);
+    assert_not_equals(attr.value, copy.value);
+
+    var copy2 = attr.cloneNode();
+    check_copy(attr, copy2, Attr);
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy2.localName);
+    assert_equals(attr.value, copy2.value);
+}, "createAttribute");
+
+test(function() {
+    var attr = document.createAttributeNS("http://www.w3.org/1999/xhtml", "foo:class");
+    var copy = attr.cloneNode();
+    check_copy(attr, copy, Attr);
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy.localName);
+    assert_equals(attr.value, copy.value);
+
+    attr.value = "abc";
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy.localName);
+    assert_not_equals(attr.value, copy.value);
+
+    var copy2 = attr.cloneNode();
+    check_copy(attr, copy2, Attr);
+    assert_equals(attr.namespaceURI, copy.namespaceURI);
+    assert_equals(attr.prefix, copy.prefix);
+    assert_equals(attr.localName, copy2.localName);
+    assert_equals(attr.value, copy2.value);
+}, "createAttributeNS");
+
+test(function() {
+    var doctype = document.implementation.createDocumentType("html", "public", "system");
+    var copy = doctype.cloneNode();
+    check_copy(doctype, copy, DocumentType);
+    assert_equals(doctype.name, copy.name, "name");
+    assert_equals(doctype.publicId, copy.publicId, "publicId");
+    assert_equals(doctype.systemId, copy.systemId, "systemId");
+}, "implementation.createDocumentType");
+
+test(function() {
+    var doc = document.implementation.createDocument(null, null);
+    var copy = doc.cloneNode();
+    check_copy(doc, copy, Document);
+    assert_equals(doc.charset, "UTF-8", "charset value");
+    assert_equals(doc.charset, copy.charset, "charset equality");
+    assert_equals(doc.contentType, "application/xml", "contentType value");
+    assert_equals(doc.contentType, copy.contentType, "contentType equality");
+    assert_equals(doc.URL, "about:blank", "URL value")
+    assert_equals(doc.URL, copy.URL, "URL equality");
+    assert_equals(doc.compatMode, "CSS1Compat", "compatMode value");
+    assert_equals(doc.compatMode, copy.compatMode, "compatMode equality");
+}, "implementation.createDocument");
+
+test(function() {
+    var html = document.implementation.createHTMLDocument("title");
+    var copy = html.cloneNode();
+    check_copy(html, copy, Document);
+    assert_equals(copy.title, "", "title value");
+}, "implementation.createHTMLDocument");
+
+test(function() {
+    var parent = document.createElement("div");
+    var child1 = document.createElement("div");
+    var child2 = document.createElement("div");
+    var grandChild = document.createElement("div");
+
+    child2.appendChild(grandChild);
+    parent.appendChild(child1);
+    parent.appendChild(child2);
+
+    var deep = true;
+    var copy = parent.cloneNode(deep);
+
+    check_copy(parent, copy, HTMLDivElement);
+    assert_equals(copy.childNodes.length, 2,
+                  "copy.childNodes.length with deep copy");
+
+    check_copy(child1, copy.childNodes[0], HTMLDivElement);
+    assert_equals(copy.childNodes[0].childNodes.length, 0,
+                  "copy.childNodes[0].childNodes.length");
+
+    check_copy(child2, copy.childNodes[1], HTMLDivElement);
+    assert_equals(copy.childNodes[1].childNodes.length, 1,
+                  "copy.childNodes[1].childNodes.length");
+    check_copy(grandChild, copy.childNodes[1].childNodes[0], HTMLDivElement);
+
+    deep = false;
+    copy = parent.cloneNode(deep);
+
+    check_copy(parent, copy, HTMLDivElement);
+    assert_equals(copy.childNodes.length, 0,
+                  "copy.childNodes.length with non-deep copy");
+}, "node with children");
+
+test(() => {
+  const proto = Object.create(HTMLElement.prototype),
+        node = document.createElement("hi");
+  Object.setPrototypeOf(node, proto);
+  assert_true(proto.isPrototypeOf(node));
+  const clone = node.cloneNode();
+  assert_false(proto.isPrototypeOf(clone));
+  assert_true(HTMLUnknownElement.prototype.isPrototypeOf(clone));
+  const deepClone = node.cloneNode(true);
+  assert_false(proto.isPrototypeOf(deepClone));
+  assert_true(HTMLUnknownElement.prototype.isPrototypeOf(deepClone));
+}, "Node with custom prototype")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-compareDocumentPosition.html b/tests/wpt/dom/nodes/Node-compareDocumentPosition.html
new file mode 100644
index 00000000..afae60aa
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-compareDocumentPosition.html
@@ -0,0 +1,87 @@
+<!doctype html>
+<title>Node.compareDocumentPosition() tests</title>
+<link rel=author title="Aryeh Gregor" href=ayg@aryeh.name>
+<div id=log></div>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=../common.js></script>
+<script>
+"use strict";
+
+testNodes.forEach(function(referenceName) {
+  var reference = eval(referenceName);
+  testNodes.forEach(function(otherName) {
+    var other = eval(otherName);
+    test(function() {
+      var result = reference.compareDocumentPosition(other);
+
+      // "If other and reference are the same object, return zero and
+      // terminate these steps."
+      if (other === reference) {
+        assert_equals(result, 0);
+        return;
+      }
+
+      // "If other and reference are not in the same tree, return the result of
+      // adding DOCUMENT_POSITION_DISCONNECTED,
+      // DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, and either
+      // DOCUMENT_POSITION_PRECEDING or DOCUMENT_POSITION_FOLLOWING, with the
+      // constraint that this is to be consistent, together and terminate these
+      // steps."
+      if (furthestAncestor(reference) !== furthestAncestor(other)) {
+        // TODO: Test that it's consistent.
+        assert_in_array(result, [Node.DOCUMENT_POSITION_DISCONNECTED +
+                                 Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC +
+                                 Node.DOCUMENT_POSITION_PRECEDING,
+                                 Node.DOCUMENT_POSITION_DISCONNECTED +
+                                 Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC +
+                                 Node.DOCUMENT_POSITION_FOLLOWING]);
+        return;
+      }
+
+      // "If other is an ancestor of reference, return the result of
+      // adding DOCUMENT_POSITION_CONTAINS to DOCUMENT_POSITION_PRECEDING
+      // and terminate these steps."
+      var ancestor = reference.parentNode;
+      while (ancestor && ancestor !== other) {
+        ancestor = ancestor.parentNode;
+      }
+      if (ancestor === other) {
+        assert_equals(result, Node.DOCUMENT_POSITION_CONTAINS +
+                              Node.DOCUMENT_POSITION_PRECEDING);
+        return;
+      }
+
+      // "If other is a descendant of reference, return the result of adding
+      // DOCUMENT_POSITION_CONTAINED_BY to DOCUMENT_POSITION_FOLLOWING and
+      // terminate these steps."
+      ancestor = other.parentNode;
+      while (ancestor && ancestor !== reference) {
+        ancestor = ancestor.parentNode;
+      }
+      if (ancestor === reference) {
+        assert_equals(result, Node.DOCUMENT_POSITION_CONTAINED_BY +
+                              Node.DOCUMENT_POSITION_FOLLOWING);
+        return;
+      }
+
+      // "If other is preceding reference return DOCUMENT_POSITION_PRECEDING
+      // and terminate these steps."
+      var prev = previousNode(reference);
+      while (prev && prev !== other) {
+        prev = previousNode(prev);
+      }
+      if (prev === other) {
+        assert_equals(result, Node.DOCUMENT_POSITION_PRECEDING);
+        return;
+      }
+
+      // "Return DOCUMENT_POSITION_FOLLOWING."
+      assert_equals(result, Node.DOCUMENT_POSITION_FOLLOWING);
+    }, referenceName + ".compareDocumentPosition(" + otherName + ")");
+  });
+});
+
+testDiv.parentNode.removeChild(testDiv);
+</script>
+<!-- vim: set expandtab tabstop=2 shiftwidth=2: -->
diff --git a/tests/wpt/dom/nodes/Node-constants.html b/tests/wpt/dom/nodes/Node-constants.html
new file mode 100644
index 00000000..33e7c10e
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-constants.html
@@ -0,0 +1,39 @@
+<!doctype html>
+<title>Node constants</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../constants.js"></script>
+<div id="log"></div>
+<script>
+var objects;
+setup(function() {
+  objects = [
+    [Node, "Node interface object"],
+    [Node.prototype, "Node prototype object"],
+    [document.createElement("foo"), "Element object"],
+    [document.createTextNode("bar"), "Text object"]
+  ]
+})
+testConstants(objects, [
+  ["ELEMENT_NODE", 1],
+  ["ATTRIBUTE_NODE", 2],
+  ["TEXT_NODE", 3],
+  ["CDATA_SECTION_NODE", 4],
+  ["ENTITY_REFERENCE_NODE", 5],
+  ["ENTITY_NODE", 6],
+  ["PROCESSING_INSTRUCTION_NODE", 7],
+  ["COMMENT_NODE", 8],
+  ["DOCUMENT_NODE", 9],
+  ["DOCUMENT_TYPE_NODE", 10],
+  ["DOCUMENT_FRAGMENT_NODE", 11],
+  ["NOTATION_NODE", 12]
+], "nodeType")
+testConstants(objects, [
+  ["DOCUMENT_POSITION_DISCONNECTED", 0x01],
+  ["DOCUMENT_POSITION_PRECEDING", 0x02],
+  ["DOCUMENT_POSITION_FOLLOWING", 0x04],
+  ["DOCUMENT_POSITION_CONTAINS", 0x08],
+  ["DOCUMENT_POSITION_CONTAINED_BY", 0x10],
+  ["DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC", 0x20]
+], "createDocumentPosition")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-contains-xml.xml b/tests/wpt/dom/nodes/Node-contains-xml.xml
new file mode 100644
index 00000000..f9b20d68
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-contains-xml.xml
@@ -0,0 +1,83 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<title>Node.nodeName</title>
+<link rel="author" title="Olli Pettay" href="mailto:Olli@Pettay.fi"/>
+<link rel="author" title="Ms2ger" href="mailto:Ms2ger@gmail.com"/>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<div id="log"/>
+<div id="test">
+  <input type="button" id="testbutton"/>
+  <a id="link">Link text</a>
+</div>
+<script>
+<![CDATA[
+test(function() {
+  assert_throws_js(TypeError, function() {
+    document.contains();
+  });
+  assert_throws_js(TypeError, function() {
+    document.contains(9);
+  });
+}, "Should throw TypeError if the arguments are wrong.");
+
+test(function() {
+  assert_equals(document.contains(null), false, "Document shouldn't contain null.");
+}, "contains(null) should be false");
+
+test(function() {
+  assert_equals(document.contains(document), true, "Document should contain itself!");
+  assert_equals(document.contains(document.createElement("foo")), false, "Document shouldn't contain element which is't in the document");
+  assert_equals(document.contains(document.createTextNode("foo")), false, "Document shouldn't contain text node which is't in the document");
+}, "document.contains");
+
+test(function() {
+  var tb = document.getElementById("testbutton");
+  assert_equals(tb.contains(tb), true, "Element should contain itself.")
+  assert_equals(document.contains(tb), true, "Document should contain element in it!");
+  assert_equals(document.documentElement.contains(tb), true, "Element should contain element in it!");
+}, "contains with a button");
+
+test(function() {
+  var link = document.getElementById("link");
+  var text = link.firstChild;
+  assert_equals(document.contains(text), true, "Document should contain a text node in it.");
+  assert_equals(link.contains(text), true, "Element should contain a text node in it.");
+  assert_equals(text.contains(text), true, "Text node should contain itself.");
+  assert_equals(text.contains(link), false, "text node shouldn't contain its parent.");
+}, "contains with a text node");
+
+test(function() {
+  var pi = document.createProcessingInstruction("adf", "asd");
+  assert_equals(pi.contains(document), false, "Processing instruction shouldn't contain document");
+  assert_equals(document.contains(pi), false, "Document shouldn't contain newly created processing instruction");
+  document.documentElement.appendChild(pi);
+  assert_equals(document.contains(pi), true, "Document should contain processing instruction");
+}, "contains with a processing instruction");
+
+test(function() {
+  if ("createContextualFragment" in document.createRange()) {
+    var df = document.createRange().createContextualFragment("<div>foo</div>");
+    assert_equals(df.contains(df.firstChild), true, "Document fragment should contain its child");
+    assert_equals(df.contains(df.firstChild.firstChild), true,
+       "Document fragment should contain its descendant");
+    assert_equals(df.contains(df), true, "Document fragment should contain itself.");
+  }
+}, "contains with a document fragment");
+
+test(function() {
+  var d = document.implementation.createHTMLDocument("");
+  assert_equals(document.contains(d), false,
+     "Document shouldn't contain another document.");
+  assert_equals(document.contains(d.createElement("div")), false,
+     "Document shouldn't contain an element from another document.");
+  assert_equals(document.contains(d.documentElement), false,
+     "Document shouldn't contain an element from another document.");
+}, "contaibs with another document");
+]]>
+</script>
+</body>
+</html>
diff --git a/tests/wpt/dom/nodes/Node-contains.html b/tests/wpt/dom/nodes/Node-contains.html
new file mode 100644
index 00000000..c44f072b
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-contains.html
@@ -0,0 +1,36 @@
+<!doctype html>
+<title>Node.contains() tests</title>
+<link rel=author title="Aryeh Gregor" href=ayg@aryeh.name>
+<div id=log></div>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=../common.js></script>
+<script>
+"use strict";
+
+testNodes.forEach(function(referenceName) {
+  var reference = eval(referenceName);
+
+  test(function() {
+    assert_false(reference.contains(null));
+  }, referenceName + ".contains(null)");
+
+  testNodes.forEach(function(otherName) {
+    var other = eval(otherName);
+    test(function() {
+      var ancestor = other;
+      while (ancestor && ancestor !== reference) {
+        ancestor = ancestor.parentNode;
+      }
+      if (ancestor === reference) {
+        assert_true(reference.contains(other));
+      } else {
+        assert_false(reference.contains(other));
+      }
+    }, referenceName + ".contains(" + otherName + ")");
+  });
+});
+
+testDiv.parentNode.removeChild(testDiv);
+</script>
+<!-- vim: set expandtab tabstop=2 shiftwidth=2: -->
diff --git a/tests/wpt/dom/nodes/Node-insertBefore.html b/tests/wpt/dom/nodes/Node-insertBefore.html
new file mode 100644
index 00000000..ecb4d183
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-insertBefore.html
@@ -0,0 +1,297 @@
+<!DOCTYPE html>
+<title>Node.insertBefore</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<!-- First test shared pre-insertion checks that work similarly for replaceChild
+     and insertBefore -->
+<script>
+  var insertFunc = Node.prototype.insertBefore;
+</script>
+<script src="pre-insertion-validation-notfound.js"></script>
+<script src="pre-insertion-validation-hierarchy.js"></script>
+<script>
+preInsertionValidateHierarchy("insertBefore");
+
+function testLeafNode(nodeName, createNodeFunction) {
+  test(function() {
+    var node = createNodeFunction();
+    assert_throws_js(TypeError, function() { node.insertBefore(null, null) })
+  }, "Calling insertBefore with a non-Node first argument on a leaf node " + nodeName + " must throw TypeError.")
+  test(function() {
+    var node = createNodeFunction();
+    assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { node.insertBefore(document.createTextNode("fail"), null) })
+    // Would be step 2.
+    assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { node.insertBefore(node, null) })
+    // Would be step 3.
+    assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { node.insertBefore(node, document.createTextNode("child")) })
+  }, "Calling insertBefore an a leaf node " + nodeName + " must throw HIERARCHY_REQUEST_ERR.")
+}
+
+test(function() {
+  // WebIDL: first argument.
+  assert_throws_js(TypeError, function() { document.body.insertBefore(null, null) })
+  assert_throws_js(TypeError, function() { document.body.insertBefore(null, document.body.firstChild) })
+  assert_throws_js(TypeError, function() { document.body.insertBefore({'a':'b'}, document.body.firstChild) })
+}, "Calling insertBefore with a non-Node first argument must throw TypeError.")
+
+test(function() {
+  // WebIDL: second argument.
+  assert_throws_js(TypeError, function() { document.body.insertBefore(document.createTextNode("child")) })
+  assert_throws_js(TypeError, function() { document.body.insertBefore(document.createTextNode("child"), {'a':'b'}) })
+}, "Calling insertBefore with second argument missing, or other than Node, null, or undefined, must throw TypeError.")
+
+testLeafNode("DocumentType", function () { return document.doctype; } )
+testLeafNode("Text", function () { return document.createTextNode("Foo") })
+testLeafNode("Comment", function () { return document.createComment("Foo") })
+testLeafNode("ProcessingInstruction", function () { return document.createProcessingInstruction("foo", "bar") })
+
+test(function() {
+  // Step 2.
+  assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { document.body.insertBefore(document.body, document.getElementById("log")) })
+  assert_throws_dom("HIERARCHY_REQUEST_ERR", function() { document.body.insertBefore(document.documentElement, document.getElementById("log")) })
+}, "Calling insertBefore with an inclusive ancestor of the context object must throw HIERARCHY_REQUEST_ERR.")
+
+// Step 3.
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  assert_throws_dom("NotFoundError", function() {
+    a.insertBefore(b, c);
+  });
+}, "Calling insertBefore with a reference child whose parent is not the context node must throw a NotFoundError.")
+
+// Step 4.1.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var doc2 = document.implementation.createHTMLDocument("title2");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doc2, doc.documentElement);
+  });
+
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doc.createTextNode("text"), doc.documentElement);
+  });
+}, "If the context node is a document, inserting a document or text node should throw a HierarchyRequestError.")
+
+// Step 4.2.1.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  doc.removeChild(doc.documentElement);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  df.appendChild(doc.createElement("b"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.firstChild);
+  });
+
+  df = doc.createDocumentFragment();
+  df.appendChild(doc.createTextNode("text"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.firstChild);
+  });
+
+  df = doc.createDocumentFragment();
+  df.appendChild(doc.createComment("comment"));
+  df.appendChild(doc.createTextNode("text"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.firstChild);
+  });
+}, "If the context node is a document, inserting a DocumentFragment that contains a text node or too many elements should throw a HierarchyRequestError.")
+
+// Step 4.2.2.
+test(function() {
+  // The context node has an element child.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  assert_array_equals(doc.childNodes, [doc.doctype, doc.documentElement, comment]);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.doctype);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.documentElement);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, null);
+  });
+}, "If the context node is a document, inserting a DocumentFragment with an element if there already is an element child should throw a HierarchyRequestError.")
+test(function() {
+  // /child/ is a doctype.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, doc.doctype);
+  });
+}, "If the context node is a document and a doctype is following the reference child, inserting a DocumentFragment with an element should throw a HierarchyRequestError.")
+test(function() {
+  // /child/ is not null and a doctype is following /child/.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(df, comment);
+  });
+}, "If the context node is a document, inserting a DocumentFragment with an element before the doctype should throw a HierarchyRequestError.")
+
+// Step 4.3.
+test(function() {
+  // The context node has an element child.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  assert_array_equals(doc.childNodes, [doc.doctype, doc.documentElement, comment]);
+
+  var a = doc.createElement("a");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, doc.doctype);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, doc.documentElement);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, null);
+  });
+}, "If the context node is a document, inserting an element if there already is an element child should throw a HierarchyRequestError.")
+test(function() {
+  // /child/ is a doctype.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var a = doc.createElement("a");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, doc.doctype);
+  });
+}, "If the context node is a document, inserting an element before the doctype should throw a HierarchyRequestError.")
+test(function() {
+  // /child/ is not null and a doctype is following /child/.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var a = doc.createElement("a");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(a, comment);
+  });
+}, "If the context node is a document and a doctype is following the reference child, inserting an element should throw a HierarchyRequestError.")
+
+// Step 4.4.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype, doc.documentElement]);
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, doc.doctype);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, doc.documentElement);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, null);
+  });
+}, "If the context node is a document, inserting a doctype if there already is a doctype child should throw a HierarchyRequestError.")
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  doc.removeChild(doc.doctype);
+  assert_array_equals(doc.childNodes, [doc.documentElement, comment]);
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, comment);
+  });
+}, "If the context node is a document, inserting a doctype after the document element should throw a HierarchyRequestError.")
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  doc.removeChild(doc.doctype);
+  assert_array_equals(doc.childNodes, [doc.documentElement, comment]);
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.insertBefore(doctype, null);
+  });
+}, "If the context node is a document with and element child, appending a doctype should throw a HierarchyRequestError.")
+
+// Step 5.
+test(function() {
+  var df = document.createDocumentFragment();
+  var a = df.appendChild(document.createElement("a"));
+
+  var doc = document.implementation.createHTMLDocument("title");
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.insertBefore(doc, a);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.insertBefore(doc, null);
+  });
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.insertBefore(doctype, a);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.insertBefore(doctype, null);
+  });
+}, "If the context node is a DocumentFragment, inserting a document or a doctype should throw a HierarchyRequestError.")
+test(function() {
+  var el = document.createElement("div");
+  var a = el.appendChild(document.createElement("a"));
+
+  var doc = document.implementation.createHTMLDocument("title");
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.insertBefore(doc, a);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.insertBefore(doc, null);
+  });
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.insertBefore(doctype, a);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.insertBefore(doctype, null);
+  });
+}, "If the context node is an element, inserting a document or a doctype should throw a HierarchyRequestError.")
+
+// Step 7.
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  a.appendChild(b);
+  a.appendChild(c);
+  assert_array_equals(a.childNodes, [b, c]);
+  assert_equals(a.insertBefore(b, b), b);
+  assert_array_equals(a.childNodes, [b, c]);
+  assert_equals(a.insertBefore(c, c), c);
+  assert_array_equals(a.childNodes, [b, c]);
+}, "Inserting a node before itself should not move the node");
+</script>
diff --git a/tests/wpt/dom/nodes/Node-isConnected-shadow-dom.html b/tests/wpt/dom/nodes/Node-isConnected-shadow-dom.html
new file mode 100644
index 00000000..7d04dc32
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isConnected-shadow-dom.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Test of Node.isConnected in a shadow tree</title>
+<link rel="help" href="https://dom.spec.whatwg.org/#connected">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<body>
+<script>
+"use strict";
+
+function testIsConnected(mode) {
+  test(() => {
+    const host = document.createElement("div");
+    document.body.appendChild(host);
+
+    const root = host.attachShadow({ mode });
+
+    const node = document.createElement("div");
+    root.appendChild(node);
+
+    assert_true(node.isConnected);
+  }, `Node.isConnected in a ${mode} shadow tree`);
+}
+
+for (const mode of ["closed", "open"]) {
+  testIsConnected(mode);
+}
+</script>
diff --git a/tests/wpt/dom/nodes/Node-isConnected.html b/tests/wpt/dom/nodes/Node-isConnected.html
new file mode 100644
index 00000000..da0b460d
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isConnected.html
@@ -0,0 +1,95 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<head>
+<title>Node.prototype.isConnected</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-isconnected">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<script>
+
+"use strict";
+
+test(function() {
+  var nodes = [document.createElement("div"),
+               document.createElement("div"),
+               document.createElement("div")];
+  checkNodes([], nodes);
+
+  // Append nodes[0].
+  document.body.appendChild(nodes[0]);
+  checkNodes([nodes[0]],
+             [nodes[1], nodes[2]]);
+
+  // Append nodes[1] and nodes[2] together.
+  nodes[1].appendChild(nodes[2]);
+  checkNodes([nodes[0]],
+             [nodes[1], nodes[2]]);
+
+  nodes[0].appendChild(nodes[1]);
+  checkNodes(nodes, []);
+
+  // Remove nodes[2].
+  nodes[2].remove();
+  checkNodes([nodes[0], nodes[1]],
+             [nodes[2]]);
+
+  // Remove nodes[0] and nodes[1] together.
+  nodes[0].remove();
+  checkNodes([], nodes);
+}, "Test with ordinary child nodes");
+
+test(function() {
+  var nodes = [document.createElement("iframe"),
+               document.createElement("iframe"),
+               document.createElement("iframe"),
+               document.createElement("iframe"),
+               document.createElement("div")];
+  var frames = [nodes[0],
+                nodes[1],
+                nodes[2],
+                nodes[3]];
+  checkNodes([], nodes);
+
+  // Since we cannot append anything to the contentWindow of an iframe before it
+  // is appended to the main DOM tree, we append the iframes one after another.
+  document.body.appendChild(nodes[0]);
+  checkNodes([nodes[0]],
+             [nodes[1], nodes[2], nodes[3], nodes[4]]);
+
+  frames[0].contentDocument.body.appendChild(nodes[1]);
+  checkNodes([nodes[0], nodes[1]],
+             [nodes[2], nodes[3], nodes[4]]);
+
+  frames[1].contentDocument.body.appendChild(nodes[2]);
+  checkNodes([nodes[0], nodes[1], nodes[2]],
+             [nodes[3], nodes[4]]);
+
+  frames[2].contentDocument.body.appendChild(nodes[3]);
+  checkNodes([nodes[0], nodes[1], nodes[2], nodes[3]],
+             [nodes[4]]);
+
+  frames[3].contentDocument.body.appendChild(nodes[4]);
+  checkNodes(nodes, []);
+
+  frames[3].remove();
+  // Since node[4] is still under the doument of frame[3], it's still connected.
+  checkNodes([nodes[0], nodes[1], nodes[2], nodes[4]],
+             [nodes[3]]);
+
+  frames[0].remove();
+  // Since node[1] and node[2] are still under the doument of frame[0], they are
+  // still connected.
+  checkNodes([nodes[1], nodes[2], nodes[4]],
+             [nodes[0], nodes[3]]);
+}, "Test with iframes");
+
+// This helper function is used to check whether nodes should be connected.
+function checkNodes(aConnectedNodes, aDisconnectedNodes) {
+  aConnectedNodes.forEach(node => assert_true(node.isConnected));
+  aDisconnectedNodes.forEach(node => assert_false(node.isConnected));
+}
+
+</script>
+</body>
diff --git a/tests/wpt/dom/nodes/Node-isEqualNode-iframe1.xml b/tests/wpt/dom/nodes/Node-isEqualNode-iframe1.xml
new file mode 100644
index 00000000..8077e73c
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isEqualNode-iframe1.xml
@@ -0,0 +1 @@
+<!DOCTYPE foo [ <!ELEMENT foo (#PCDATA)> ]><foo/>
diff --git a/tests/wpt/dom/nodes/Node-isEqualNode-iframe2.xml b/tests/wpt/dom/nodes/Node-isEqualNode-iframe2.xml
new file mode 100644
index 00000000..eacc9d17
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isEqualNode-iframe2.xml
@@ -0,0 +1 @@
+<!DOCTYPE foo [ <!ELEMENT foo EMPTY> ]><foo/>
diff --git a/tests/wpt/dom/nodes/Node-isEqualNode-xhtml.xhtml b/tests/wpt/dom/nodes/Node-isEqualNode-xhtml.xhtml
new file mode 100644
index 00000000..3170643d
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isEqualNode-xhtml.xhtml
@@ -0,0 +1,84 @@
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<title>Node.isEqualNode</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<div id="log"/>
+<script>
+function testNullHandling(node) {
+  test(function() {
+    assert_false(node.isEqualNode(null))
+    assert_false(node.isEqualNode(undefined))
+  })
+}
+[
+  document.createElement("foo"),
+  document.createTextNode("foo"),
+  document.createProcessingInstruction("foo", "bar"),
+  document.createComment("foo"),
+  document,
+  document.implementation.createDocumentType("html", "", ""),
+  document.createDocumentFragment()
+].forEach(testNullHandling)
+
+test(function() {
+  var a = document.createElement("foo")
+  a.setAttribute("a", "bar")
+  a.setAttribute("b", "baz")
+  var b = document.createElement("foo")
+  b.setAttribute("b", "baz")
+  b.setAttribute("a", "bar")
+  assert_true(a.isEqualNode(b))
+}, "isEqualNode should return true when the attributes are in a different order")
+
+test(function() {
+  var a = document.createElementNS("ns", "prefix:foo")
+  var b = document.createElementNS("ns", "prefix:foo")
+  assert_true(a.isEqualNode(b))
+}, "isEqualNode should return true if elements have same namespace, prefix, and local name")
+
+test(function() {
+  var a = document.createElementNS("ns1", "prefix:foo")
+  var b = document.createElementNS("ns2", "prefix:foo")
+  assert_false(a.isEqualNode(b))
+}, "isEqualNode should return false if elements have different namespace")
+
+test(function() {
+  var a = document.createElementNS("ns", "prefix1:foo")
+  var b = document.createElementNS("ns", "prefix2:foo")
+  assert_false(a.isEqualNode(b))
+}, "isEqualNode should return false if elements have different prefix")
+
+test(function() {
+  var a = document.createElementNS("ns", "prefix:foo1")
+  var b = document.createElementNS("ns", "prefix:foo2")
+  assert_false(a.isEqualNode(b))
+}, "isEqualNode should return false if elements have different local name")
+
+test(function() {
+  var a = document.createElement("foo")
+  a.setAttributeNS("ns", "x:a", "bar")
+  var b = document.createElement("foo")
+  b.setAttributeNS("ns", "y:a", "bar")
+  assert_true(a.isEqualNode(b))
+}, "isEqualNode should return true when the attributes have different prefixes")
+var internalSubset = async_test("isEqualNode should return true when only the internal subsets of DocumentTypes differ.")
+var wait = 2;
+function iframeLoaded() {
+  if (!--wait) {
+    internalSubset.step(function() {
+      var doc1 = document.getElementById("subset1").contentDocument
+      var doc2 = document.getElementById("subset2").contentDocument
+      assert_true(doc1.doctype.isEqualNode(doc2.doctype), "doc1.doctype.isEqualNode(doc2.doctype)")
+      assert_true(doc1.isEqualNode(doc2), "doc1.isEqualNode(doc2)")
+    })
+    internalSubset.done()
+  }
+}
+</script>
+<iframe id="subset1" onload="iframeLoaded()" src="Node-isEqualNode-iframe1.xml" />
+<iframe id="subset2" onload="iframeLoaded()" src="Node-isEqualNode-iframe2.xml" />
+</body>
+</html>
diff --git a/tests/wpt/dom/nodes/Node-isEqualNode.html b/tests/wpt/dom/nodes/Node-isEqualNode.html
new file mode 100644
index 00000000..9ff4c5b0
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isEqualNode.html
@@ -0,0 +1,161 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Node.prototype.isEqualNode</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-isequalnode">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script>
+"use strict";
+
+test(function() {
+
+  var doctype1 = document.implementation.createDocumentType("qualifiedName", "publicId", "systemId");
+  var doctype2 = document.implementation.createDocumentType("qualifiedName", "publicId", "systemId");
+  var doctype3 = document.implementation.createDocumentType("qualifiedName2", "publicId", "systemId");
+  var doctype4 = document.implementation.createDocumentType("qualifiedName", "publicId2", "systemId");
+  var doctype5 = document.implementation.createDocumentType("qualifiedName", "publicId", "systemId3");
+
+  assert_true(doctype1.isEqualNode(doctype1), "self-comparison");
+  assert_true(doctype1.isEqualNode(doctype2), "same properties");
+  assert_false(doctype1.isEqualNode(doctype3), "different name");
+  assert_false(doctype1.isEqualNode(doctype4), "different public ID");
+  assert_false(doctype1.isEqualNode(doctype5), "different system ID");
+
+}, "doctypes should be compared on name, public ID, and system ID");
+
+test(function() {
+
+  var element1 = document.createElementNS("namespace", "prefix:localName");
+  var element2 = document.createElementNS("namespace", "prefix:localName");
+  var element3 = document.createElementNS("namespace2", "prefix:localName");
+  var element4 = document.createElementNS("namespace", "prefix2:localName");
+  var element5 = document.createElementNS("namespace", "prefix:localName2");
+
+  var element6 = document.createElementNS("namespace", "prefix:localName");
+  element6.setAttribute("foo", "bar");
+
+  assert_true(element1.isEqualNode(element1), "self-comparison");
+  assert_true(element1.isEqualNode(element2), "same properties");
+  assert_false(element1.isEqualNode(element3), "different namespace");
+  assert_false(element1.isEqualNode(element4), "different prefix");
+  assert_false(element1.isEqualNode(element5), "different local name");
+  assert_false(element1.isEqualNode(element6), "different number of attributes");
+
+}, "elements should be compared on namespace, namespace prefix, local name, and number of attributes");
+
+test(function() {
+
+  var element1 = document.createElement("element");
+  element1.setAttributeNS("namespace", "prefix:localName", "value");
+
+  var element2 = document.createElement("element");
+  element2.setAttributeNS("namespace", "prefix:localName", "value");
+
+  var element3 = document.createElement("element");
+  element3.setAttributeNS("namespace2", "prefix:localName", "value");
+
+  var element4 = document.createElement("element");
+  element4.setAttributeNS("namespace", "prefix2:localName", "value");
+
+  var element5 = document.createElement("element");
+  element5.setAttributeNS("namespace", "prefix:localName2", "value");
+
+  var element6 = document.createElement("element");
+  element6.setAttributeNS("namespace", "prefix:localName", "value2");
+
+  assert_true(element1.isEqualNode(element1), "self-comparison");
+  assert_true(element1.isEqualNode(element2), "attribute with same properties");
+  assert_false(element1.isEqualNode(element3), "attribute with different namespace");
+  assert_true(element1.isEqualNode(element4), "attribute with different prefix");
+  assert_false(element1.isEqualNode(element5), "attribute with different local name");
+  assert_false(element1.isEqualNode(element6), "attribute with different value");
+
+}, "elements should be compared on attribute namespace, local name, and value");
+
+test(function() {
+
+  var pi1 = document.createProcessingInstruction("target", "data");
+  var pi2 = document.createProcessingInstruction("target", "data");
+  var pi3 = document.createProcessingInstruction("target2", "data");
+  var pi4 = document.createProcessingInstruction("target", "data2");
+
+  assert_true(pi1.isEqualNode(pi1), "self-comparison");
+  assert_true(pi1.isEqualNode(pi2), "same properties");
+  assert_false(pi1.isEqualNode(pi3), "different target");
+  assert_false(pi1.isEqualNode(pi4), "different data");
+
+}, "processing instructions should be compared on target and data");
+
+test(function() {
+
+  var text1 = document.createTextNode("data");
+  var text2 = document.createTextNode("data");
+  var text3 = document.createTextNode("data2");
+
+  assert_true(text1.isEqualNode(text1), "self-comparison");
+  assert_true(text1.isEqualNode(text2), "same properties");
+  assert_false(text1.isEqualNode(text3), "different data");
+
+}, "text nodes should be compared on data");
+
+test(function() {
+
+  var comment1 = document.createComment("data");
+  var comment2 = document.createComment("data");
+  var comment3 = document.createComment("data2");
+
+  assert_true(comment1.isEqualNode(comment1), "self-comparison");
+  assert_true(comment1.isEqualNode(comment2), "same properties");
+  assert_false(comment1.isEqualNode(comment3), "different data");
+
+}, "comments should be compared on data");
+
+test(function() {
+
+  var documentFragment1 = document.createDocumentFragment();
+  var documentFragment2 = document.createDocumentFragment();
+
+  assert_true(documentFragment1.isEqualNode(documentFragment1), "self-comparison");
+  assert_true(documentFragment1.isEqualNode(documentFragment2), "same properties");
+
+}, "document fragments should not be compared based on properties");
+
+test(function() {
+
+  var document1 = document.implementation.createDocument("", "");
+  var document2 = document.implementation.createDocument("", "");
+
+  assert_true(document1.isEqualNode(document1), "self-comparison");
+  assert_true(document1.isEqualNode(document2), "another empty XML document");
+
+  var htmlDoctype = document.implementation.createDocumentType("html", "", "");
+  var document3 = document.implementation.createDocument("http://www.w3.org/1999/xhtml", "html", htmlDoctype);
+  document3.documentElement.appendChild(document3.createElement("head"));
+  document3.documentElement.appendChild(document3.createElement("body"));
+  var document4 = document.implementation.createHTMLDocument();
+  assert_true(document3.isEqualNode(document4), "default HTML documents, created different ways");
+
+}, "documents should not be compared based on properties");
+
+test(function() {
+
+  testDeepEquality(function() { return document.createElement("foo") });
+  testDeepEquality(function() { return document.createDocumentFragment() });
+  testDeepEquality(function() { return document.implementation.createDocument("", "") });
+  testDeepEquality(function() { return document.implementation.createHTMLDocument() });
+
+  function testDeepEquality(parentFactory) {
+    // Some ad-hoc tests of deep equality
+
+    var parentA = parentFactory();
+    var parentB = parentFactory();
+
+    parentA.appendChild(document.createComment("data"));
+    assert_false(parentA.isEqualNode(parentB));
+    parentB.appendChild(document.createComment("data"));
+    assert_true(parentA.isEqualNode(parentB));
+  }
+
+}, "node equality testing should test descendant equality too");
+</script>
diff --git a/tests/wpt/dom/nodes/Node-isSameNode.html b/tests/wpt/dom/nodes/Node-isSameNode.html
new file mode 100644
index 00000000..b37442ac
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-isSameNode.html
@@ -0,0 +1,111 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Node.prototype.isSameNode</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-issamenode">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script>
+"use strict";
+
+test(function() {
+
+  var doctype1 = document.implementation.createDocumentType("qualifiedName", "publicId", "systemId");
+  var doctype2 = document.implementation.createDocumentType("qualifiedName", "publicId", "systemId");
+
+  assert_true(doctype1.isSameNode(doctype1), "self-comparison");
+  assert_false(doctype1.isSameNode(doctype2), "same properties");
+  assert_false(doctype1.isSameNode(null), "with null other node");
+}, "doctypes should be compared on reference");
+
+test(function() {
+
+  var element1 = document.createElementNS("namespace", "prefix:localName");
+  var element2 = document.createElementNS("namespace", "prefix:localName");
+
+  assert_true(element1.isSameNode(element1), "self-comparison");
+  assert_false(element1.isSameNode(element2), "same properties");
+  assert_false(element1.isSameNode(null), "with null other node");
+
+}, "elements should be compared on reference (namespaced element)");
+
+test(function() {
+
+  var element1 = document.createElement("element");
+  element1.setAttributeNS("namespace", "prefix:localName", "value");
+
+  var element2 = document.createElement("element");
+  element2.setAttributeNS("namespace", "prefix:localName", "value");
+
+  assert_true(element1.isSameNode(element1), "self-comparison");
+  assert_false(element1.isSameNode(element2), "same properties");
+  assert_false(element1.isSameNode(null), "with null other node");
+
+}, "elements should be compared on reference (namespaced attribute)");
+
+test(function() {
+
+  var pi1 = document.createProcessingInstruction("target", "data");
+  var pi2 = document.createProcessingInstruction("target", "data");
+
+  assert_true(pi1.isSameNode(pi1), "self-comparison");
+  assert_false(pi1.isSameNode(pi2), "different target");
+  assert_false(pi1.isSameNode(null), "with null other node");
+
+}, "processing instructions should be compared on reference");
+
+test(function() {
+
+  var text1 = document.createTextNode("data");
+  var text2 = document.createTextNode("data");
+
+  assert_true(text1.isSameNode(text1), "self-comparison");
+  assert_false(text1.isSameNode(text2), "same properties");
+  assert_false(text1.isSameNode(null), "with null other node");
+
+}, "text nodes should be compared on reference");
+
+test(function() {
+
+  var comment1 = document.createComment("data");
+  var comment2 = document.createComment("data");
+
+  assert_true(comment1.isSameNode(comment1), "self-comparison");
+  assert_false(comment1.isSameNode(comment2), "same properties");
+  assert_false(comment1.isSameNode(null), "with null other node");
+
+}, "comments should be compared on reference");
+
+test(function() {
+
+  var documentFragment1 = document.createDocumentFragment();
+  var documentFragment2 = document.createDocumentFragment();
+
+  assert_true(documentFragment1.isSameNode(documentFragment1), "self-comparison");
+  assert_false(documentFragment1.isSameNode(documentFragment2), "same properties");
+  assert_false(documentFragment1.isSameNode(null), "with null other node");
+
+}, "document fragments should be compared on reference");
+
+test(function() {
+
+  var document1 = document.implementation.createDocument("", "");
+  var document2 = document.implementation.createDocument("", "");
+
+  assert_true(document1.isSameNode(document1), "self-comparison");
+  assert_false(document1.isSameNode(document2), "another empty XML document");
+  assert_false(document1.isSameNode(null), "with null other node");
+
+}, "documents should be compared on reference");
+
+test(function() {
+
+  var attr1 = document.createAttribute('href');
+  var attr2 = document.createAttribute('href');
+
+  assert_true(attr1.isSameNode(attr1), "self-comparison");
+  assert_false(attr1.isSameNode(attr2), "same name");
+  assert_false(attr1.isSameNode(null), "with null other node");
+
+}, "attributes should be compared on reference");
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-lookupNamespaceURI.html b/tests/wpt/dom/nodes/Node-lookupNamespaceURI.html
new file mode 100644
index 00000000..925c5283
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-lookupNamespaceURI.html
@@ -0,0 +1,139 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>LookupNamespaceURI and IsDefaultNamespace tests</title>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+</head>
+<body>
+<h1>LookupNamespaceURI and IsDefaultNamespace</h1>
+<div id="log"/>
+<script>
+function lookupNamespaceURI(node, prefix, expected, name) {
+  test(function() {
+    assert_equals(node.lookupNamespaceURI(prefix), expected);
+  }, name);
+}
+
+function isDefaultNamespace(node, namespace, expected, name) {
+  test(function() {
+    assert_equals(node.isDefaultNamespace(namespace), expected);
+  }, name);
+}
+
+
+var frag = document.createDocumentFragment();
+lookupNamespaceURI(frag, null, null, 'DocumentFragment should have null namespace, prefix null');
+lookupNamespaceURI(frag, '', null, 'DocumentFragment should have null namespace, prefix ""');
+lookupNamespaceURI(frag, 'foo', null, 'DocumentFragment should have null namespace, prefix "foo"');
+lookupNamespaceURI(frag, 'xml', null, 'DocumentFragment should have null namespace, prefix "xml"');
+lookupNamespaceURI(frag, 'xmlns', null, 'DocumentFragment should have null namespace, prefix "xmlns"');
+isDefaultNamespace(frag, null, true, 'DocumentFragment is in default namespace, prefix null');
+isDefaultNamespace(frag, '', true, 'DocumentFragment is in default namespace, prefix ""');
+isDefaultNamespace(frag, 'foo', false, 'DocumentFragment is in default namespace, prefix "foo"');
+isDefaultNamespace(frag, 'xmlns', false, 'DocumentFragment is in default namespace, prefix "xmlns"');
+
+var docType = document.doctype;
+lookupNamespaceURI(docType, null, null, 'DocumentType should have null namespace, prefix null');
+lookupNamespaceURI(docType, '', null, 'DocumentType should have null namespace, prefix ""');
+lookupNamespaceURI(docType, 'foo', null, 'DocumentType should have null namespace, prefix "foo"');
+lookupNamespaceURI(docType, 'xml', null, 'DocumentType should have null namespace, prefix "xml"');
+lookupNamespaceURI(docType, 'xmlns', null, 'DocumentType should have null namespace, prefix "xmlns"');
+isDefaultNamespace(docType, null, true, 'DocumentType is in default namespace, prefix null');
+isDefaultNamespace(docType, '', true, 'DocumentType is in default namespace, prefix ""');
+isDefaultNamespace(docType, 'foo', false, 'DocumentType is in default namespace, prefix "foo"');
+isDefaultNamespace(docType, 'xmlns', false, 'DocumentType is in default namespace, prefix "xmlns"');
+
+var fooElem = document.createElementNS('fooNamespace', 'prefix:elem');
+fooElem.setAttribute('bar', 'value');
+const XMLNS_NS = 'http://www.w3.org/2000/xmlns/';
+const XML_NS =  'http://www.w3.org/XML/1998/namespace';
+lookupNamespaceURI(fooElem, null, null, 'Element should have null namespace, prefix null');
+lookupNamespaceURI(fooElem, '', null, 'Element should have null namespace, prefix ""');
+lookupNamespaceURI(fooElem, 'fooNamespace', null, 'Element should not have namespace matching prefix with namespaceURI value');
+lookupNamespaceURI(fooElem, 'xml', XML_NS, 'Element should have XML namespace');
+lookupNamespaceURI(fooElem, 'xmlns', XMLNS_NS, 'Element should have XMLNS namespace');
+lookupNamespaceURI(fooElem, 'prefix', 'fooNamespace', 'Element has namespace URI matching prefix');
+isDefaultNamespace(fooElem, null, true, 'Empty namespace is not default, prefix null');
+isDefaultNamespace(fooElem, '', true, 'Empty namespace is not default, prefix ""');
+isDefaultNamespace(fooElem, 'fooNamespace', false, 'fooNamespace is not default');
+isDefaultNamespace(fooElem, XMLNS_NS, false, 'xmlns namespace is not default');
+
+fooElem.setAttributeNS(XMLNS_NS, 'xmlns:bar', 'barURI');
+fooElem.setAttributeNS(XMLNS_NS, 'xmlns', 'bazURI');
+
+lookupNamespaceURI(fooElem, null, 'bazURI', 'Element should have baz namespace, prefix null');
+lookupNamespaceURI(fooElem, '', 'bazURI', 'Element should have baz namespace, prefix ""');
+lookupNamespaceURI(fooElem, 'xmlns', XMLNS_NS, 'Element should have namespace with xmlns prefix');
+lookupNamespaceURI(fooElem, 'bar', 'barURI', 'Element has bar namespace');
+
+isDefaultNamespace(fooElem, null, false, 'Empty namespace is not default on fooElem, prefix null');
+isDefaultNamespace(fooElem, '', false, 'Empty namespace is not default on fooElem, prefix ""');
+isDefaultNamespace(fooElem, 'barURI', false, 'bar namespace is not default');
+isDefaultNamespace(fooElem, 'bazURI', true, 'baz namespace is default');
+
+var comment = document.createComment('comment');
+fooElem.appendChild(comment);
+
+lookupNamespaceURI(comment, null, 'bazURI', 'Comment should inherit baz namespace');
+lookupNamespaceURI(comment, '', 'bazURI', 'Comment should inherit  baz namespace');
+lookupNamespaceURI(comment, 'prefix', 'fooNamespace', 'Comment should inherit namespace URI matching prefix');
+lookupNamespaceURI(comment, 'bar', 'barURI', 'Comment should inherit bar namespace');
+
+isDefaultNamespace(comment, null, false, 'For comment, empty namespace is not default, prefix null');
+isDefaultNamespace(comment, '', false, 'For comment, empty namespace is not default, prefix ""');
+isDefaultNamespace(comment, 'fooNamespace', false, 'For comment, fooNamespace is not default');
+isDefaultNamespace(comment, XMLNS_NS, false, 'For comment, xmlns namespace is not default');
+isDefaultNamespace(comment, 'barURI', false, 'For comment, inherited bar namespace is not default');
+isDefaultNamespace(comment, 'bazURI', true, 'For comment, inherited baz namespace is default');
+
+var fooChild = document.createElementNS('childNamespace', 'childElem');
+fooElem.appendChild(fooChild);
+
+lookupNamespaceURI(fooChild, null, 'childNamespace', 'Child element should inherit baz namespace');
+lookupNamespaceURI(fooChild, '', 'childNamespace', 'Child element should have null namespace');
+lookupNamespaceURI(fooChild, 'xmlns', XMLNS_NS, 'Child element should have XMLNS namespace');
+lookupNamespaceURI(fooChild, 'prefix', 'fooNamespace', 'Child element has namespace URI matching prefix');
+
+isDefaultNamespace(fooChild, null, false, 'Empty namespace is not default for child, prefix null');
+isDefaultNamespace(fooChild, '', false, 'Empty namespace is not default for child, prefix ""');
+isDefaultNamespace(fooChild, 'fooNamespace', false, 'fooNamespace is not default for child');
+isDefaultNamespace(fooChild, XMLNS_NS, false, 'xmlns namespace is not default for child');
+isDefaultNamespace(fooChild, 'barURI', false, 'bar namespace is not default for child');
+isDefaultNamespace(fooChild, 'bazURI', false, 'baz namespace is default for child');
+isDefaultNamespace(fooChild, 'childNamespace', true, 'childNamespace is default for child');
+
+document.documentElement.setAttributeNS(XMLNS_NS, 'xmlns:bar', 'barURI');
+document.documentElement.setAttributeNS(XMLNS_NS, 'xmlns', 'bazURI');
+
+lookupNamespaceURI(document, null, 'http://www.w3.org/1999/xhtml', 'Document should have xhtml namespace, prefix null');
+lookupNamespaceURI(document, '', 'http://www.w3.org/1999/xhtml', 'Document should have xhtml namespace, prefix ""');
+lookupNamespaceURI(document, 'prefix', null, 'Document has no namespace URI matching prefix');
+lookupNamespaceURI(document, 'bar', 'barURI', 'Document has bar namespace');
+
+isDefaultNamespace(document, null, false, 'For document, empty namespace is not default, prefix null');
+isDefaultNamespace(document, '', false, 'For document, empty namespace is not default, prefix ""');
+isDefaultNamespace(document, 'fooNamespace', false, 'For document, fooNamespace is not default');
+isDefaultNamespace(document, XMLNS_NS, false, 'For document, xmlns namespace is not default');
+isDefaultNamespace(document, 'barURI', false, 'For document, bar namespace is not default');
+isDefaultNamespace(document, 'bazURI', false, 'For document, baz namespace is not default');
+isDefaultNamespace(document, 'http://www.w3.org/1999/xhtml', true, 'For document, xhtml namespace is default');
+
+const doc = new Document();
+lookupNamespaceURI(doc, 'xml', null, 'Document without documentElement has no namespace URI matching "xml"');
+lookupNamespaceURI(doc, 'xmlns', null, 'Document without documentElement has no namespace URI matching "xmlns"');
+
+const attr = document.createAttribute('foo');
+lookupNamespaceURI(attr, 'xml', null, 'Disconnected Attr has no namespace URI matching "xml"');
+lookupNamespaceURI(attr, 'xmlns', null, 'Disconnected Attr has no namespace URI matching "xmlns"');
+document.body.setAttributeNode(attr);
+lookupNamespaceURI(attr, 'xml', XML_NS, 'Connected Attr has namespace URI matching "xml"');
+lookupNamespaceURI(attr, 'xmlns', XMLNS_NS, 'Connected Attr no namespace URI matching "xmlns"');
+
+var comment = document.createComment('comment');
+document.appendChild(comment);
+lookupNamespaceURI(comment, 'bar', null, 'Comment does not have bar namespace');
+
+</script>
+</body>
+</html>
diff --git a/tests/wpt/dom/nodes/Node-lookupPrefix.xhtml b/tests/wpt/dom/nodes/Node-lookupPrefix.xhtml
new file mode 100644
index 00000000..50a487c5
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-lookupPrefix.xhtml
@@ -0,0 +1,31 @@
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:x="test">
+<head>
+<title>Node.lookupPrefix</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body xmlns:s="test">
+<div id="log"/>
+<x xmlns:t="test"><!--comment--><?test test?>TEST<x/></x>
+<script>
+function lookupPrefix(node, ns, prefix) {
+  test(function() {
+    assert_equals(node.lookupPrefix(ns), prefix)
+  })
+}
+var x = document.getElementsByTagName("x")[0];
+lookupPrefix(document, "test", "x") // XXX add test for when there is no documentElement
+lookupPrefix(document, null, null)
+lookupPrefix(x, "http://www.w3.org/1999/xhtml", null)
+lookupPrefix(x, "something", null)
+lookupPrefix(x, null, null)
+lookupPrefix(x, "test", "t")
+lookupPrefix(x.parentNode, "test", "s")
+lookupPrefix(x.firstChild, "test", "t")
+lookupPrefix(x.childNodes[1], "test", "t")
+lookupPrefix(x.childNodes[2], "test", "t")
+lookupPrefix(x.lastChild, "test", "t")
+x.parentNode.removeChild(x)
+</script>
+</body>
+</html>
diff --git a/tests/wpt/dom/nodes/Node-mutation-adoptNode.html b/tests/wpt/dom/nodes/Node-mutation-adoptNode.html
new file mode 100644
index 00000000..9c9594c0
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-mutation-adoptNode.html
@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node-manipulation-adopted</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-domimplementation-createhtmldocument">
+<link rel=help href="https://dom.spec.whatwg.org/#mutation-algorithms">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+"use strict";
+
+test(() => {
+  const old = document.implementation.createHTMLDocument("");
+  const div = old.createElement("div");
+  div.appendChild(old.createTextNode("text"));
+  assert_equals(div.ownerDocument, old);
+  assert_equals(div.firstChild.ownerDocument, old);
+  document.body.appendChild(div);
+  assert_equals(div.ownerDocument, document);
+  assert_equals(div.firstChild.ownerDocument, document);
+}, "simple append of foreign div with text");
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-nodeName-xhtml.xhtml b/tests/wpt/dom/nodes/Node-nodeName-xhtml.xhtml
new file mode 100644
index 00000000..bc478af8
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-nodeName-xhtml.xhtml
@@ -0,0 +1,42 @@
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+<title>Node.nodeName</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+</head>
+<body>
+<div id="log"/>
+<script>
+test(function() {
+  var HTMLNS = "http://www.w3.org/1999/xhtml",
+      SVGNS = "http://www.w3.org/2000/svg"
+  assert_equals(document.createElementNS(HTMLNS, "I").nodeName, "I")
+  assert_equals(document.createElementNS(HTMLNS, "i").nodeName, "i")
+  assert_equals(document.createElementNS(SVGNS, "svg").nodeName, "svg")
+  assert_equals(document.createElementNS(SVGNS, "SVG").nodeName, "SVG")
+  assert_equals(document.createElementNS(HTMLNS, "x:b").nodeName, "x:b")
+}, "For Element nodes, nodeName should return the same as tagName.")
+test(function() {
+  assert_equals(document.createTextNode("foo").nodeName, "#text")
+}, "For Text nodes, nodeName should return \"#text\".")
+test(function() {
+  assert_equals(document.createProcessingInstruction("foo", "bar").nodeName,
+                "foo")
+}, "For ProcessingInstruction nodes, nodeName should return the target.")
+test(function() {
+  assert_equals(document.createComment("foo").nodeName, "#comment")
+}, "For Comment nodes, nodeName should return \"#comment\".")
+test(function() {
+  assert_equals(document.nodeName, "#document")
+}, "For Document nodes, nodeName should return \"#document\".")
+test(function() {
+  assert_equals(document.doctype.nodeName, "html")
+}, "For DocumentType nodes, nodeName should return the name.")
+test(function() {
+  assert_equals(document.createDocumentFragment().nodeName,
+                "#document-fragment")
+}, "For DocumentFragment nodes, nodeName should return \"#document-fragment\".")
+</script>
+</body>
+</html>
diff --git a/tests/wpt/dom/nodes/Node-nodeName.html b/tests/wpt/dom/nodes/Node-nodeName.html
new file mode 100644
index 00000000..911f9345
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-nodeName.html
@@ -0,0 +1,32 @@
+<!DOCTYPE html>
+<title>Node.nodeName</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  var HTMLNS = "http://www.w3.org/1999/xhtml",
+      SVGNS = "http://www.w3.org/2000/svg"
+  assert_equals(document.createElementNS(HTMLNS, "I").nodeName, "I")
+  assert_equals(document.createElementNS(HTMLNS, "i").nodeName, "I")
+  assert_equals(document.createElementNS(SVGNS, "svg").nodeName, "svg")
+  assert_equals(document.createElementNS(SVGNS, "SVG").nodeName, "SVG")
+  assert_equals(document.createElementNS(HTMLNS, "x:b").nodeName, "X:B")
+}, "For Element nodes, nodeName should return the same as tagName.")
+test(function() {
+  assert_equals(document.createTextNode("foo").nodeName, "#text")
+}, "For Text nodes, nodeName should return \"#text\".")
+test(function() {
+  assert_equals(document.createComment("foo").nodeName, "#comment")
+}, "For Comment nodes, nodeName should return \"#comment\".")
+test(function() {
+  assert_equals(document.nodeName, "#document")
+}, "For Document nodes, nodeName should return \"#document\".")
+test(function() {
+  assert_equals(document.doctype.nodeName, "html")
+}, "For DocumentType nodes, nodeName should return the name.")
+test(function() {
+  assert_equals(document.createDocumentFragment().nodeName,
+                "#document-fragment")
+}, "For DocumentFragment nodes, nodeName should return \"#document-fragment\".")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-nodeValue.html b/tests/wpt/dom/nodes/Node-nodeValue.html
new file mode 100644
index 00000000..79ce80b8
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-nodeValue.html
@@ -0,0 +1,71 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>Node.nodeValue</title>
+<link rel=help href="https://dom.spec.whatwg.org/#dom-node-nodevalue">
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<div id=log></div>
+<script>
+test(function() {
+  var the_text = document.createTextNode("A span!");
+  assert_equals(the_text.nodeValue, "A span!");
+  assert_equals(the_text.data, "A span!");
+  the_text.nodeValue = "test again";
+  assert_equals(the_text.nodeValue, "test again");
+  assert_equals(the_text.data, "test again");
+  the_text.nodeValue = null;
+  assert_equals(the_text.nodeValue, "");
+  assert_equals(the_text.data, "");
+}, "Text.nodeValue");
+
+test(function() {
+  var the_comment = document.createComment("A comment!");
+  assert_equals(the_comment.nodeValue, "A comment!");
+  assert_equals(the_comment.data, "A comment!");
+  the_comment.nodeValue = "test again";
+  assert_equals(the_comment.nodeValue, "test again");
+  assert_equals(the_comment.data, "test again");
+  the_comment.nodeValue = null;
+  assert_equals(the_comment.nodeValue, "");
+  assert_equals(the_comment.data, "");
+}, "Comment.nodeValue");
+
+test(function() {
+  var the_pi = document.createProcessingInstruction("pi", "A PI!");
+  assert_equals(the_pi.nodeValue, "A PI!");
+  assert_equals(the_pi.data, "A PI!");
+  the_pi.nodeValue = "test again";
+  assert_equals(the_pi.nodeValue, "test again");
+  assert_equals(the_pi.data, "test again");
+  the_pi.nodeValue = null;
+  assert_equals(the_pi.nodeValue, "");
+  assert_equals(the_pi.data, "");
+}, "ProcessingInstruction.nodeValue");
+
+test(function() {
+  var the_link = document.createElement("a");
+  assert_equals(the_link.nodeValue, null);
+  the_link.nodeValue = "foo";
+  assert_equals(the_link.nodeValue, null);
+}, "Element.nodeValue");
+
+test(function() {
+  assert_equals(document.nodeValue, null);
+  document.nodeValue = "foo";
+  assert_equals(document.nodeValue, null);
+}, "Document.nodeValue");
+
+test(function() {
+  var the_frag = document.createDocumentFragment();
+  assert_equals(the_frag.nodeValue, null);
+  the_frag.nodeValue = "foo";
+  assert_equals(the_frag.nodeValue, null);
+}, "DocumentFragment.nodeValue");
+
+test(function() {
+  var the_doctype = document.doctype;
+  assert_equals(the_doctype.nodeValue, null);
+  the_doctype.nodeValue = "foo";
+  assert_equals(the_doctype.nodeValue, null);
+}, "DocumentType.nodeValue");
+</script>
diff --git a/tests/wpt/dom/nodes/Node-normalize.html b/tests/wpt/dom/nodes/Node-normalize.html
new file mode 100644
index 00000000..4d455996
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-normalize.html
@@ -0,0 +1,83 @@
+<!DOCTYPE html>
+<title>Node.normalize()</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id=log></div>
+<script>
+test(function() {
+  var df = document.createDocumentFragment(),
+      t1 = document.createTextNode("1"),
+      t2 = document.createTextNode("2"),
+      t3 = document.createTextNode("3"),
+      t4 = document.createTextNode("4")
+  df.appendChild(t1)
+  df.appendChild(t2)
+  assert_equals(df.childNodes.length, 2)
+  assert_equals(df.textContent, "12")
+  var el = document.createElement('x')
+  df.appendChild(el)
+  el.appendChild(t3)
+  el.appendChild(t4)
+  document.normalize()
+  assert_equals(el.childNodes.length, 2)
+  assert_equals(el.textContent, "34")
+  assert_equals(df.childNodes.length, 3)
+  assert_equals(t1.data, "1")
+  df.normalize()
+  assert_equals(df.childNodes.length, 2)
+  assert_equals(df.firstChild, t1)
+  assert_equals(t1.data, "12")
+  assert_equals(t2.data, "2")
+  assert_equals(el.firstChild, t3)
+  assert_equals(t3.data, "34")
+  assert_equals(t4.data, "4")
+})
+
+// https://www.w3.org/Bugs/Public/show_bug.cgi?id=19837
+test(function() {
+  var div = document.createElement("div")
+  var t1 = div.appendChild(document.createTextNode(""))
+  var t2 = div.appendChild(document.createTextNode("a"))
+  var t3 = div.appendChild(document.createTextNode(""))
+  assert_array_equals(div.childNodes, [t1, t2, t3])
+  div.normalize();
+  assert_array_equals(div.childNodes, [t2])
+}, "Empty text nodes separated by a non-empty text node")
+test(function() {
+  var div = document.createElement("div")
+  var t1 = div.appendChild(document.createTextNode(""))
+  var t2 = div.appendChild(document.createTextNode(""))
+  assert_array_equals(div.childNodes, [t1, t2])
+  div.normalize();
+  assert_array_equals(div.childNodes, [])
+}, "Empty text nodes")
+
+// The specification for normalize is clear that only "exclusive Text
+// nodes" are to be modified. This excludes CDATASection nodes, which
+// derive from Text. Naïve implementations may fail to skip
+// CDATASection nodes, or even worse, try to test textContent or
+// nodeValue without taking care to check the node type. They will
+// fail this test.
+test(function() {
+  // We create an XML document so that we can create CDATASection.
+  // Except for the CDATASection the result should be the same for
+  // an HTML document. (No non-Text node should be touched.)
+  var doc = new DOMParser().parseFromString("<div/>", "text/xml")
+  var div = doc.documentElement
+  var t1 = div.appendChild(doc.createTextNode("a"))
+  // The first parameter is the "target" of the processing
+  // instruction, and the 2nd is the text content.
+  var t2 = div.appendChild(doc.createProcessingInstruction("pi", ""))
+  var t3 = div.appendChild(doc.createTextNode("b"))
+  var t4 = div.appendChild(doc.createCDATASection(""))
+  var t5 = div.appendChild(doc.createTextNode("c"))
+  var t6 = div.appendChild(doc.createComment(""))
+  var t7 = div.appendChild(doc.createTextNode("d"))
+  var t8 = div.appendChild(doc.createElement("el"))
+  var t9 = div.appendChild(doc.createTextNode("e"))
+  var expected = [t1, t2, t3, t4, t5, t6, t7, t8, t9]
+  assert_array_equals(div.childNodes, expected)
+  div.normalize()
+  assert_array_equals(div.childNodes, expected)
+}, "Non-text nodes with empty textContent values.")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-parentElement.html b/tests/wpt/dom/nodes/Node-parentElement.html
new file mode 100644
index 00000000..bc564bee
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-parentElement.html
@@ -0,0 +1,82 @@
+<!DOCTYPE html>
+<title>Node.parentElement</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+test(function() {
+  assert_equals(document.parentElement, null)
+}, "When the parent is null, parentElement should be null")
+test(function() {
+  assert_equals(document.doctype.parentElement, null)
+}, "When the parent is a document, parentElement should be null (doctype)")
+test(function() {
+  assert_equals(document.documentElement.parentElement, null)
+}, "When the parent is a document, parentElement should be null (element)")
+test(function() {
+  var comment = document.appendChild(document.createComment("foo"))
+  assert_equals(comment.parentElement, null)
+}, "When the parent is a document, parentElement should be null (comment)")
+test(function() {
+  var df = document.createDocumentFragment()
+  assert_equals(df.parentElement, null)
+  var el = document.createElement("div")
+  assert_equals(el.parentElement, null)
+  df.appendChild(el)
+  assert_equals(el.parentNode, df)
+  assert_equals(el.parentElement, null)
+}, "parentElement should return null for children of DocumentFragments (element)")
+test(function() {
+  var df = document.createDocumentFragment()
+  assert_equals(df.parentElement, null)
+  var text = document.createTextNode("bar")
+  assert_equals(text.parentElement, null)
+  df.appendChild(text)
+  assert_equals(text.parentNode, df)
+  assert_equals(text.parentElement, null)
+}, "parentElement should return null for children of DocumentFragments (text)")
+test(function() {
+  var df = document.createDocumentFragment()
+  var parent = document.createElement("div")
+  df.appendChild(parent)
+  var el = document.createElement("div")
+  assert_equals(el.parentElement, null)
+  parent.appendChild(el)
+  assert_equals(el.parentElement, parent)
+}, "parentElement should work correctly with DocumentFragments (element)")
+test(function() {
+  var df = document.createDocumentFragment()
+  var parent = document.createElement("div")
+  df.appendChild(parent)
+  var text = document.createTextNode("bar")
+  assert_equals(text.parentElement, null)
+  parent.appendChild(text)
+  assert_equals(text.parentElement, parent)
+}, "parentElement should work correctly with DocumentFragments (text)")
+test(function() {
+  var parent = document.createElement("div")
+  var el = document.createElement("div")
+  assert_equals(el.parentElement, null)
+  parent.appendChild(el)
+  assert_equals(el.parentElement, parent)
+}, "parentElement should work correctly in disconnected subtrees (element)")
+test(function() {
+  var parent = document.createElement("div")
+  var text = document.createTextNode("bar")
+  assert_equals(text.parentElement, null)
+  parent.appendChild(text)
+  assert_equals(text.parentElement, parent)
+}, "parentElement should work correctly in disconnected subtrees (text)")
+test(function() {
+  var el = document.createElement("div")
+  assert_equals(el.parentElement, null)
+  document.body.appendChild(el)
+  assert_equals(el.parentElement, document.body)
+}, "parentElement should work correctly in a document (element)")
+test(function() {
+  var text = document.createElement("div")
+  assert_equals(text.parentElement, null)
+  document.body.appendChild(text)
+  assert_equals(text.parentElement, document.body)
+}, "parentElement should work correctly in a document (text)")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-parentNode-iframe.html b/tests/wpt/dom/nodes/Node-parentNode-iframe.html
new file mode 100644
index 00000000..88bc5ab4
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-parentNode-iframe.html
@@ -0,0 +1 @@
+<a name='c'>c</a>
\ No newline at end of file
diff --git a/tests/wpt/dom/nodes/Node-parentNode.html b/tests/wpt/dom/nodes/Node-parentNode.html
new file mode 100644
index 00000000..cff61786
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-parentNode.html
@@ -0,0 +1,33 @@
+<!DOCTYPE html>
+<title>Node.parentNode</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+// XXX need to test for more node types
+test(function() {
+  assert_equals(document.parentNode, null)
+}, "Document")
+test(function() {
+  assert_equals(document.doctype.parentNode, document)
+}, "Doctype")
+test(function() {
+  assert_equals(document.documentElement.parentNode, document)
+}, "Root element")
+test(function() {
+  var el = document.createElement("div")
+  assert_equals(el.parentNode, null)
+  document.body.appendChild(el)
+  assert_equals(el.parentNode, document.body)
+}, "Element")
+var t = async_test("Removed iframe");
+function testIframe(iframe) {
+  t.step(function() {
+    var doc = iframe.contentDocument;
+    iframe.parentNode.removeChild(iframe);
+    assert_equals(doc.firstChild.parentNode, doc);
+  });
+  t.done();
+}
+</script>
+<iframe id=a src="Node-parentNode-iframe.html" onload="testIframe(this)"></iframe>
diff --git a/tests/wpt/dom/nodes/Node-properties.html b/tests/wpt/dom/nodes/Node-properties.html
new file mode 100644
index 00000000..10f92e7d
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-properties.html
@@ -0,0 +1,688 @@
+<!doctype html>
+<title>Node assorted property tests</title>
+<link rel=author title="Aryeh Gregor" href=ayg@aryeh.name>
+<meta charset=utf-8>
+<div id=log></div>
+<script src=/resources/testharness.js></script>
+<script src=/resources/testharnessreport.js></script>
+<script src=../common.js></script>
+<script>
+"use strict";
+/**
+ * First we define a data structure to tell us what tests to run.  The keys
+ * will be eval()ed, and are mostly global variables defined in common.js.  The
+ * values are objects, which maps properties to expected values.  So
+ *
+ *     foo: {
+ *         bar: "baz",
+ *         quz: 7,
+ *     },
+ *
+ * will test that eval("foo.bar") === "baz" and eval("foo.quz") === 7.  "foo"
+ * and "bar" could thus be expressions, like "document.documentElement" and
+ * "childNodes[4]" respectively.
+ *
+ * To avoid repetition, some values are automatically added based on others.
+ * For instance, if we specify nodeType: Node.TEXT_NODE, we'll automatically
+ * also test nodeName: "#text".  This is handled by code after this variable is
+ * defined.
+ */
+var expected = {
+    testDiv: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: document.body,
+        parentElement: document.body,
+        "childNodes.length": 6,
+        "childNodes[0]": paras[0],
+        "childNodes[1]": paras[1],
+        "childNodes[2]": paras[2],
+        "childNodes[3]": paras[3],
+        "childNodes[4]": paras[4],
+        "childNodes[5]": comment,
+        previousSibling: null,
+        nextSibling: document.getElementById("log"),
+        textContent: "A\u0308b\u0308c\u0308d\u0308e\u0308f\u0308g\u0308h\u0308\nIjklmnop\nQrstuvwxYzabcdefGhijklmn",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "div",
+        tagName: "DIV",
+        id: "test",
+        "children[0]": paras[0],
+        "children[1]": paras[1],
+        "children[2]": paras[2],
+        "children[3]": paras[3],
+        "children[4]": paras[4],
+        previousElementSibling: null,
+        // nextSibling isn't explicitly set
+        //nextElementSibling: ,
+        childElementCount: 5,
+    },
+    detachedDiv: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: null,
+        parentElement: null,
+        "childNodes.length": 2,
+        "childNodes[0]": detachedPara1,
+        "childNodes[1]": detachedPara2,
+        previousSibling: null,
+        nextSibling: null,
+        textContent: "OpqrstuvWxyzabcd",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "div",
+        tagName: "DIV",
+        "children[0]": detachedPara1,
+        "children[1]": detachedPara2,
+        previousElementSibling: null,
+        nextElementSibling: null,
+        childElementCount: 2,
+    },
+    detachedPara1: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: detachedDiv,
+        parentElement: detachedDiv,
+        "childNodes.length": 1,
+        previousSibling: null,
+        nextSibling: detachedPara2,
+        textContent: "Opqrstuv",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        previousElementSibling: null,
+        nextElementSibling: detachedPara2,
+        childElementCount: 0,
+    },
+    detachedPara2: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: detachedDiv,
+        parentElement: detachedDiv,
+        "childNodes.length": 1,
+        previousSibling: detachedPara1,
+        nextSibling: null,
+        textContent: "Wxyzabcd",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        previousElementSibling: detachedPara1,
+        nextElementSibling: null,
+        childElementCount: 0,
+    },
+    document: {
+        // Node
+        nodeType: Node.DOCUMENT_NODE,
+        "childNodes.length": 2,
+        "childNodes[0]": document.doctype,
+        "childNodes[1]": document.documentElement,
+
+        // Document
+        URL: String(location),
+        compatMode: "CSS1Compat",
+        characterSet: "UTF-8",
+        contentType: "text/html",
+        doctype: doctype,
+        //documentElement: ,
+    },
+    foreignDoc: {
+        // Node
+        nodeType: Node.DOCUMENT_NODE,
+        "childNodes.length": 3,
+        "childNodes[0]": foreignDoc.doctype,
+        "childNodes[1]": foreignDoc.documentElement,
+        "childNodes[2]": foreignComment,
+
+        // Document
+        URL: "about:blank",
+        compatMode: "CSS1Compat",
+        characterSet: "UTF-8",
+        contentType: "text/html",
+        //doctype: ,
+        //documentElement: ,
+    },
+    foreignPara1: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: foreignDoc.body,
+        parentElement: foreignDoc.body,
+        "childNodes.length": 1,
+        previousSibling: null,
+        nextSibling: foreignPara2,
+        textContent: "Efghijkl",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        previousElementSibling: null,
+        nextElementSibling: foreignPara2,
+        childElementCount: 0,
+    },
+    foreignPara2: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: foreignDoc.body,
+        parentElement: foreignDoc.body,
+        "childNodes.length": 1,
+        previousSibling: foreignPara1,
+        nextSibling: foreignTextNode,
+        textContent: "Mnopqrst",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        previousElementSibling: foreignPara1,
+        nextElementSibling: null,
+        childElementCount: 0,
+    },
+    xmlDoc: {
+        // Node
+        nodeType: Node.DOCUMENT_NODE,
+        "childNodes.length": 4,
+        "childNodes[0]": xmlDoctype,
+        "childNodes[1]": xmlElement,
+        "childNodes[2]": processingInstruction,
+        "childNodes[3]": xmlComment,
+
+        // Document
+        URL: "about:blank",
+        compatMode: "CSS1Compat",
+        characterSet: "UTF-8",
+        contentType: "application/xml",
+        //doctype: ,
+        //documentElement: ,
+    },
+    xmlElement: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: xmlDoc,
+        parentElement: null,
+        "childNodes.length": 1,
+        "childNodes[0]": xmlTextNode,
+        previousSibling: xmlDoctype,
+        nextSibling: processingInstruction,
+        textContent: "do re mi fa so la ti",
+
+        // Element
+        namespaceURI: null,
+        prefix: null,
+        localName: "igiveuponcreativenames",
+        tagName: "igiveuponcreativenames",
+        previousElementSibling: null,
+        nextElementSibling: null,
+        childElementCount: 0,
+    },
+    detachedXmlElement: {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: null,
+        parentElement: null,
+        "childNodes.length": 0,
+        previousSibling: null,
+        nextSibling: null,
+        textContent: "",
+
+        // Element
+        namespaceURI: null,
+        prefix: null,
+        localName: "everyone-hates-hyphenated-element-names",
+        tagName: "everyone-hates-hyphenated-element-names",
+        previousElementSibling: null,
+        nextElementSibling: null,
+        childElementCount: 0,
+    },
+    detachedTextNode: {
+        // Node
+        nodeType: Node.TEXT_NODE,
+        ownerDocument: document,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "Uvwxyzab",
+
+        // Text
+        wholeText: "Uvwxyzab",
+    },
+    foreignTextNode: {
+        // Node
+        nodeType: Node.TEXT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: foreignDoc.body,
+        parentElement: foreignDoc.body,
+        previousSibling: foreignPara2,
+        nextSibling: null,
+        nodeValue: "I admit that I harbor doubts about whether we really need so many things to test, but it's too late to stop now.",
+
+        // Text
+        wholeText: "I admit that I harbor doubts about whether we really need so many things to test, but it's too late to stop now.",
+    },
+    detachedForeignTextNode: {
+        // Node
+        nodeType: Node.TEXT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "Cdefghij",
+
+        // Text
+        wholeText: "Cdefghij",
+    },
+    xmlTextNode: {
+        // Node
+        nodeType: Node.TEXT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: xmlElement,
+        parentElement: xmlElement,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "do re mi fa so la ti",
+
+        // Text
+        wholeText: "do re mi fa so la ti",
+    },
+    detachedXmlTextNode: {
+        // Node
+        nodeType: Node.TEXT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "Klmnopqr",
+
+        // Text
+        wholeText: "Klmnopqr",
+    },
+    processingInstruction: {
+        // Node
+        nodeType: Node.PROCESSING_INSTRUCTION_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: xmlDoc,
+        parentElement: null,
+        previousSibling: xmlElement,
+        nextSibling: xmlComment,
+        nodeValue: 'Did you know that ":syn sync fromstart" is very useful when using vim to edit large amounts of JavaScript embedded in HTML?',
+
+        // ProcessingInstruction
+        target: "somePI",
+    },
+    detachedProcessingInstruction: {
+        // Node
+        nodeType: Node.PROCESSING_INSTRUCTION_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "chirp chirp chirp",
+
+        // ProcessingInstruction
+        target: "whippoorwill",
+    },
+    comment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        previousSibling: paras[4],
+        nextSibling: null,
+        nodeValue: "Alphabet soup?",
+    },
+    detachedComment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: document,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "Stuvwxyz",
+    },
+    foreignComment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: foreignDoc,
+        parentElement: null,
+        previousSibling: foreignDoc.documentElement,
+        nextSibling: null,
+        nodeValue: '"Commenter" and "commentator" mean different things.  I\'ve seen non-native speakers trip up on this.',
+    },
+    detachedForeignComment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "אריה יהודה",
+    },
+    xmlComment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: xmlDoc,
+        parentElement: null,
+        previousSibling: processingInstruction,
+        nextSibling: null,
+        nodeValue: "I maliciously created a comment that will break incautious XML serializers, but Firefox threw an exception, so all I got was this lousy T-shirt",
+    },
+    detachedXmlComment: {
+        // Node
+        nodeType: Node.COMMENT_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: null,
+        parentElement: null,
+        previousSibling: null,
+        nextSibling: null,
+        nodeValue: "בן חיים אליעזר",
+    },
+    docfrag: {
+        // Node
+        nodeType: Node.DOCUMENT_FRAGMENT_NODE,
+        ownerDocument: document,
+        "childNodes.length": 0,
+        textContent: "",
+    },
+    foreignDocfrag: {
+        // Node
+        nodeType: Node.DOCUMENT_FRAGMENT_NODE,
+        ownerDocument: foreignDoc,
+        "childNodes.length": 0,
+        textContent: "",
+    },
+    xmlDocfrag: {
+        // Node
+        nodeType: Node.DOCUMENT_FRAGMENT_NODE,
+        ownerDocument: xmlDoc,
+        "childNodes.length": 0,
+        textContent: "",
+    },
+    doctype: {
+        // Node
+        nodeType: Node.DOCUMENT_TYPE_NODE,
+        ownerDocument: document,
+        parentNode: document,
+        previousSibling: null,
+        nextSibling: document.documentElement,
+
+        // DocumentType
+        name: "html",
+        publicId: "",
+        systemId: "",
+    },
+    foreignDoctype: {
+        // Node
+        nodeType: Node.DOCUMENT_TYPE_NODE,
+        ownerDocument: foreignDoc,
+        parentNode: foreignDoc,
+        previousSibling: null,
+        nextSibling: foreignDoc.documentElement,
+
+        // DocumentType
+        name: "html",
+        publicId: "",
+        systemId: "",
+    },
+    xmlDoctype: {
+        // Node
+        nodeType: Node.DOCUMENT_TYPE_NODE,
+        ownerDocument: xmlDoc,
+        parentNode: xmlDoc,
+        previousSibling: null,
+        nextSibling: xmlElement,
+
+        // DocumentType
+        name: "qorflesnorf",
+        publicId: "abcde",
+        systemId: "x\"'y",
+    },
+    "paras[0]": {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        "childNodes.length": 1,
+        previousSibling: null,
+        nextSibling: paras[1],
+        textContent: "A\u0308b\u0308c\u0308d\u0308e\u0308f\u0308g\u0308h\u0308\n",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        id: "a",
+        previousElementSibling: null,
+        nextElementSibling: paras[1],
+        childElementCount: 0,
+    },
+    "paras[1]": {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        "childNodes.length": 1,
+        previousSibling: paras[0],
+        nextSibling: paras[2],
+        textContent: "Ijklmnop\n",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        id: "b",
+        previousElementSibling: paras[0],
+        nextElementSibling: paras[2],
+        childElementCount: 0,
+    },
+    "paras[2]": {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        "childNodes.length": 1,
+        previousSibling: paras[1],
+        nextSibling: paras[3],
+        textContent: "Qrstuvwx",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        id: "c",
+        previousElementSibling: paras[1],
+        nextElementSibling: paras[3],
+        childElementCount: 0,
+    },
+    "paras[3]": {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        "childNodes.length": 1,
+        previousSibling: paras[2],
+        nextSibling: paras[4],
+        textContent: "Yzabcdef",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        id: "d",
+        previousElementSibling: paras[2],
+        nextElementSibling: paras[4],
+        childElementCount: 0,
+    },
+    "paras[4]": {
+        // Node
+        nodeType: Node.ELEMENT_NODE,
+        ownerDocument: document,
+        parentNode: testDiv,
+        parentElement: testDiv,
+        "childNodes.length": 1,
+        previousSibling: paras[3],
+        nextSibling: comment,
+        textContent: "Ghijklmn",
+
+        // Element
+        namespaceURI: "http://www.w3.org/1999/xhtml",
+        prefix: null,
+        localName: "p",
+        tagName: "P",
+        id: "e",
+        previousElementSibling: paras[3],
+        nextElementSibling: null,
+        childElementCount: 0,
+    },
+};
+
+for (var node in expected) {
+    // Now we set various default values by node type.
+    switch (expected[node].nodeType) {
+    case Node.ELEMENT_NODE:
+        expected[node].nodeName = expected[node].tagName;
+        expected[node].nodeValue = null;
+        expected[node]["children.length"] = expected[node].childElementCount;
+
+        if (expected[node].id === undefined) {
+            expected[node].id = "";
+        }
+        if (expected[node].className === undefined) {
+            expected[node].className = "";
+        }
+
+        var len = expected[node].childElementCount;
+        if (len === 0) {
+            expected[node].firstElementChild =
+            expected[node].lastElementChild = null;
+        } else {
+            // If we have expectations for the first/last child in children,
+            // use those.  Otherwise, at least check that .firstElementChild ==
+            // .children[0] and .lastElementChild == .children[len - 1], even
+            // if we aren't sure what they should be.
+            expected[node].firstElementChild = expected[node]["children[0]"]
+                ? expected[node]["children[0]"]
+                : eval(node).children[0];
+            expected[node].lastElementChild =
+                expected[node]["children[" + (len - 1) + "]"]
+                ? expected[node]["children[" + (len - 1) + "]"]
+                : eval(node).children[len - 1];
+        }
+        break;
+
+    case Node.TEXT_NODE:
+        expected[node].nodeName = "#text";
+        expected[node]["childNodes.length"] = 0;
+        expected[node].textContent = expected[node].data =
+            expected[node].nodeValue;
+        expected[node].length = expected[node].nodeValue.length;
+        break;
+
+    case Node.PROCESSING_INSTRUCTION_NODE:
+        expected[node].nodeName = expected[node].target;
+        expected[node]["childNodes.length"] = 0;
+        expected[node].textContent = expected[node].data =
+            expected[node].nodeValue;
+        expected[node].length = expected[node].nodeValue.length;
+        break;
+
+    case Node.COMMENT_NODE:
+        expected[node].nodeName = "#comment";
+        expected[node]["childNodes.length"] = 0;
+        expected[node].textContent = expected[node].data =
+            expected[node].nodeValue;
+        expected[node].length = expected[node].nodeValue.length;
+        break;
+
+    case Node.DOCUMENT_NODE:
+        expected[node].nodeName = "#document";
+        expected[node].ownerDocument = expected[node].parentNode =
+            expected[node].parentElement = expected[node].previousSibling =
+            expected[node].nextSibling = expected[node].nodeValue =
+            expected[node].textContent = null;
+        expected[node].documentURI = expected[node].URL;
+        expected[node].charset = expected[node].inputEncoding =
+            expected[node].characterSet;
+        break;
+
+    case Node.DOCUMENT_TYPE_NODE:
+        expected[node].nodeName = expected[node].name;
+        expected[node]["childNodes.length"] = 0;
+        expected[node].parentElement = expected[node].nodeValue =
+            expected[node].textContent = null;
+        break;
+
+    case Node.DOCUMENT_FRAGMENT_NODE:
+        expected[node].nodeName = "#document-fragment";
+        expected[node].parentNode = expected[node].parentElement =
+            expected[node].previousSibling = expected[node].nextSibling =
+            expected[node].nodeValue = null;
+        break;
+    }
+
+    // Now we set some further default values that are independent of node
+    // type.
+    var len = expected[node]["childNodes.length"];
+    if (len === 0) {
+        expected[node].firstChild = expected[node].lastChild = null;
+    } else {
+        // If we have expectations for the first/last child in childNodes, use
+        // those.  Otherwise, at least check that .firstChild == .childNodes[0]
+        // and .lastChild == .childNodes[len - 1], even if we aren't sure what
+        // they should be.
+        expected[node].firstChild = expected[node]["childNodes[0]"]
+            ? expected[node]["childNodes[0]"]
+            : eval(node).childNodes[0];
+        expected[node].lastChild =
+            expected[node]["childNodes[" + (len - 1) + "]"]
+            ? expected[node]["childNodes[" + (len - 1) + "]"]
+            : eval(node).childNodes[len - 1];
+    }
+    expected[node]["hasChildNodes()"] = !!expected[node]["childNodes.length"];
+
+    // Finally, we test!
+    for (var prop in expected[node]) {
+        test(function() {
+            assert_equals(eval(node + "." + prop), expected[node][prop]);
+        }, node + "." + prop);
+    }
+}
+
+testDiv.parentNode.removeChild(testDiv);
+</script>
diff --git a/tests/wpt/dom/nodes/Node-removeChild.html b/tests/wpt/dom/nodes/Node-removeChild.html
new file mode 100644
index 00000000..61584233
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-removeChild.html
@@ -0,0 +1,58 @@
+<!DOCTYPE html>
+<title>Node.removeChild</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="creators.js"></script>
+<div id="log"></div>
+<iframe src=about:blank></iframe>
+<script>
+var documents = [
+  [function() { return document }, "the main document"],
+  [function() { return frames[0].document }, "a frame document"],
+  [function() { return document.implementation.createHTMLDocument() },
+   "a synthetic document"],
+];
+
+documents.forEach(function(d) {
+  var get = d[0], description = d[1]
+  for (var p in creators) {
+    var creator = creators[p];
+    test(function() {
+      var doc = get();
+      var s = doc[creator]("a")
+      assert_equals(s.ownerDocument, doc)
+      assert_throws_dom("NOT_FOUND_ERR", function() { document.body.removeChild(s) })
+      assert_equals(s.ownerDocument, doc)
+    }, "Passing a detached " + p + " from " + description +
+       " to removeChild should not affect it.")
+
+    test(function() {
+      var doc = get();
+      var s = doc[creator]("b")
+      doc.documentElement.appendChild(s)
+      assert_equals(s.ownerDocument, doc)
+      assert_throws_dom("NOT_FOUND_ERR", function() { document.body.removeChild(s) })
+      assert_equals(s.ownerDocument, doc)
+    }, "Passing a non-detached " + p + " from " + description +
+       " to removeChild should not affect it.")
+
+    test(function() {
+      var doc = get();
+      var s = doc[creator]("test")
+      doc.body.appendChild(s)
+      assert_equals(s.ownerDocument, doc)
+      assert_throws_dom(
+        "NOT_FOUND_ERR",
+        (doc.defaultView || self).DOMException,
+        function() { s.removeChild(doc) }
+      );
+    }, "Calling removeChild on a " + p + " from " + description +
+       " with no children should throw NOT_FOUND_ERR.")
+  }
+});
+
+test(function() {
+  assert_throws_js(TypeError, function() { document.body.removeChild(null) })
+  assert_throws_js(TypeError, function() { document.body.removeChild({'a':'b'}) })
+}, "Passing a value that is not a Node reference to removeChild should throw TypeError.")
+</script>
diff --git a/tests/wpt/dom/nodes/Node-replaceChild.html b/tests/wpt/dom/nodes/Node-replaceChild.html
new file mode 100644
index 00000000..74aac67d
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-replaceChild.html
@@ -0,0 +1,349 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node.replaceChild</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<body><a><b></b><c></c></a>
+<div id="log"></div>
+<!-- First test shared pre-insertion checks that work similarly for replaceChild
+     and insertBefore -->
+<script>
+  var insertFunc = Node.prototype.replaceChild;
+</script>
+<script src="pre-insertion-validation-notfound.js"></script>
+<script>
+// IDL.
+test(function() {
+  var a = document.createElement("div");
+  assert_throws_js(TypeError, function() {
+    a.replaceChild(null, null);
+  });
+
+  var b = document.createElement("div");
+  assert_throws_js(TypeError, function() {
+    a.replaceChild(b, null);
+  });
+  assert_throws_js(TypeError, function() {
+    a.replaceChild(null, b);
+  });
+}, "Passing null to replaceChild should throw a TypeError.")
+
+// Step 3.
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  assert_throws_dom("NotFoundError", function() {
+    a.replaceChild(b, c);
+  });
+
+  var d = document.createElement("div");
+  d.appendChild(b);
+  assert_throws_dom("NotFoundError", function() {
+    a.replaceChild(b, c);
+  });
+  assert_throws_dom("NotFoundError", function() {
+    a.replaceChild(b, a);
+  });
+}, "If child's parent is not the context node, a NotFoundError exception should be thrown");
+
+// Step 1.
+test(function() {
+  var nodes = getNonParentNodes();
+
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  nodes.forEach(function(node) {
+    assert_throws_dom("HierarchyRequestError", function() {
+      node.replaceChild(a, b);
+    });
+  });
+}, "If the context node is not a node that can contain children, a HierarchyRequestError exception should be thrown")
+
+// Step 2.
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+
+  assert_throws_dom("HierarchyRequestError", function() {
+    a.replaceChild(a, a);
+  });
+
+  a.appendChild(b);
+  assert_throws_dom("HierarchyRequestError", function() {
+    a.replaceChild(a, b);
+  });
+
+  var c = document.createElement("div");
+  c.appendChild(a);
+  assert_throws_dom("HierarchyRequestError", function() {
+    a.replaceChild(c, b);
+  });
+}, "If node is an inclusive ancestor of the context node, a HierarchyRequestError should be thrown.")
+
+// Steps 4/5.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var doc2 = document.implementation.createHTMLDocument("title2");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(doc2, doc.documentElement);
+  });
+
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(doc.createTextNode("text"), doc.documentElement);
+  });
+}, "If the context node is a document, inserting a document or text node should throw a HierarchyRequestError.")
+
+// Step 6.1.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  df.appendChild(doc.createElement("b"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, doc.documentElement);
+  });
+
+  df = doc.createDocumentFragment();
+  df.appendChild(doc.createTextNode("text"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, doc.documentElement);
+  });
+
+  df = doc.createDocumentFragment();
+  df.appendChild(doc.createComment("comment"));
+  df.appendChild(doc.createTextNode("text"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, doc.documentElement);
+  });
+}, "If the context node is a document, inserting a DocumentFragment that contains a text node or too many elements should throw a HierarchyRequestError.")
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  doc.removeChild(doc.documentElement);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  df.appendChild(doc.createElement("b"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, doc.doctype);
+  });
+}, "If the context node is a document (without element children), inserting a DocumentFragment that contains multiple elements should throw a HierarchyRequestError.")
+
+// Step 6.1.
+test(function() {
+  // The context node has an element child that is not /child/.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  assert_array_equals(doc.childNodes, [doc.doctype, doc.documentElement, comment]);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, doc.doctype);
+  });
+}, "If the context node is a document, inserting a DocumentFragment with an element if there already is an element child should throw a HierarchyRequestError.")
+test(function() {
+  // A doctype is following /child/.
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var df = doc.createDocumentFragment();
+  df.appendChild(doc.createElement("a"));
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(df, comment);
+  });
+}, "If the context node is a document, inserting a DocumentFragment with an element before the doctype should throw a HierarchyRequestError.")
+
+// Step 6.2.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  assert_array_equals(doc.childNodes, [doc.doctype, doc.documentElement, comment]);
+
+  var a = doc.createElement("a");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(a, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(a, doc.doctype);
+  });
+}, "If the context node is a document, inserting an element if there already is an element child should throw a HierarchyRequestError.")
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  doc.removeChild(doc.documentElement);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype]);
+
+  var a = doc.createElement("a");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(a, comment);
+  });
+}, "If the context node is a document, inserting an element before the doctype should throw a HierarchyRequestError.")
+
+// Step 6.3.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.insertBefore(doc.createComment("foo"), doc.firstChild);
+  assert_array_equals(doc.childNodes, [comment, doc.doctype, doc.documentElement]);
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(doctype, comment);
+  });
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(doctype, doc.documentElement);
+  });
+}, "If the context node is a document, inserting a doctype if there already is a doctype child should throw a HierarchyRequestError.")
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var comment = doc.appendChild(doc.createComment("foo"));
+  doc.removeChild(doc.doctype);
+  assert_array_equals(doc.childNodes, [doc.documentElement, comment]);
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    doc.replaceChild(doctype, comment);
+  });
+}, "If the context node is a document, inserting a doctype after the document element should throw a HierarchyRequestError.")
+
+// Steps 4/5.
+test(function() {
+  var df = document.createDocumentFragment();
+  var a = df.appendChild(document.createElement("a"));
+
+  var doc = document.implementation.createHTMLDocument("title");
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.replaceChild(doc, a);
+  });
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    df.replaceChild(doctype, a);
+  });
+}, "If the context node is a DocumentFragment, inserting a document or a doctype should throw a HierarchyRequestError.")
+test(function() {
+  var el = document.createElement("div");
+  var a = el.appendChild(document.createElement("a"));
+
+  var doc = document.implementation.createHTMLDocument("title");
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.replaceChild(doc, a);
+  });
+
+  var doctype = document.implementation.createDocumentType("html", "", "");
+  assert_throws_dom("HierarchyRequestError", function() {
+    el.replaceChild(doctype, a);
+  });
+}, "If the context node is an element, inserting a document or a doctype should throw a HierarchyRequestError.")
+
+// Step 6.
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  a.appendChild(b);
+  a.appendChild(c);
+  assert_array_equals(a.childNodes, [b, c]);
+  assert_equals(a.replaceChild(c, b), b);
+  assert_array_equals(a.childNodes, [c]);
+}, "Replacing a node with its next sibling should work (2 children)");
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  var d = document.createElement("div");
+  var e = document.createElement("div");
+  a.appendChild(b);
+  a.appendChild(c);
+  a.appendChild(d);
+  a.appendChild(e);
+  assert_array_equals(a.childNodes, [b, c, d, e]);
+  assert_equals(a.replaceChild(d, c), c);
+  assert_array_equals(a.childNodes, [b, d, e]);
+}, "Replacing a node with its next sibling should work (4 children)");
+test(function() {
+  var a = document.createElement("div");
+  var b = document.createElement("div");
+  var c = document.createElement("div");
+  a.appendChild(b);
+  a.appendChild(c);
+  assert_array_equals(a.childNodes, [b, c]);
+  assert_equals(a.replaceChild(b, b), b);
+  assert_array_equals(a.childNodes, [b, c]);
+  assert_equals(a.replaceChild(c, c), c);
+  assert_array_equals(a.childNodes, [b, c]);
+}, "Replacing a node with itself should not move the node");
+
+// Step 7.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var doctype = doc.doctype;
+  assert_array_equals(doc.childNodes, [doctype, doc.documentElement]);
+
+  var doc2 = document.implementation.createHTMLDocument("title2");
+  var doctype2 = doc2.doctype;
+  assert_array_equals(doc2.childNodes, [doctype2, doc2.documentElement]);
+
+  doc.replaceChild(doc2.doctype, doc.doctype);
+  assert_array_equals(doc.childNodes, [doctype2, doc.documentElement]);
+  assert_array_equals(doc2.childNodes, [doc2.documentElement]);
+  assert_equals(doctype.parentNode, null);
+  assert_equals(doctype.ownerDocument, doc);
+  assert_equals(doctype2.parentNode, doc);
+  assert_equals(doctype2.ownerDocument, doc);
+}, "If the context node is a document, inserting a new doctype should work.")
+
+// Bugs.
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var df = doc.createDocumentFragment();
+  var a = df.appendChild(doc.createElement("a"));
+  assert_equals(doc.documentElement, doc.replaceChild(df, doc.documentElement));
+  assert_array_equals(doc.childNodes, [doc.doctype, a]);
+}, "Replacing the document element with a DocumentFragment containing a single element should work.");
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var df = doc.createDocumentFragment();
+  var a = df.appendChild(doc.createComment("a"));
+  var b = df.appendChild(doc.createElement("b"));
+  var c = df.appendChild(doc.createComment("c"));
+  assert_equals(doc.documentElement, doc.replaceChild(df, doc.documentElement));
+  assert_array_equals(doc.childNodes, [doc.doctype, a, b, c]);
+}, "Replacing the document element with a DocumentFragment containing a single element and comments should work.");
+test(function() {
+  var doc = document.implementation.createHTMLDocument("title");
+  var a = doc.createElement("a");
+  assert_equals(doc.documentElement, doc.replaceChild(a, doc.documentElement));
+  assert_array_equals(doc.childNodes, [doc.doctype, a]);
+}, "Replacing the document element with a single element should work.");
+test(function() {
+  document.addEventListener("DOMNodeRemoved", function(e) {
+    document.body.appendChild(document.createElement("x"));
+  }, false);
+  var a = document.body.firstChild, b = a.firstChild, c = b.nextSibling;
+  assert_equals(a.replaceChild(c, b), b);
+  assert_equals(b.parentNode, null);
+  assert_equals(a.firstChild, c);
+  assert_equals(c.parentNode, a);
+}, "replaceChild should work in the presence of mutation events.")
+test(function() {
+  var TEST_ID = "findme";
+  var gBody = document.getElementsByTagName("body")[0];
+  var parent = document.createElement("div");
+  gBody.appendChild(parent);
+  var child = document.createElement("div");
+  parent.appendChild(child);
+  var df = document.createDocumentFragment();
+  var fragChild = df.appendChild(document.createElement("div"));
+  fragChild.setAttribute("id", TEST_ID);
+  parent.replaceChild(df, child);
+  assert_equals(document.getElementById(TEST_ID), fragChild, "should not be null");
+}, "Replacing an element with a DocumentFragment should allow a child of the DocumentFragment to be found by Id.")
+
+</script>
diff --git a/tests/wpt/dom/nodes/Node-textContent.html b/tests/wpt/dom/nodes/Node-textContent.html
new file mode 100644
index 00000000..cf2e0720
--- /dev/null
+++ b/tests/wpt/dom/nodes/Node-textContent.html
@@ -0,0 +1,265 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Node.textContent</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+// XXX mutation observers?
+// XXX Range gravitation?
+
+var documents, doctypes;
+setup(function() {
+  documents = [
+    [document, "parser"],
+    [document.implementation.createDocument("", "test", null), "createDocument"],
+    [document.implementation.createHTMLDocument("title"), "createHTMLDocument"],
+  ]
+  doctypes = [
+    [document.doctype, "parser"],
+    [document.implementation.createDocumentType("x", "", ""), "script"],
+  ]
+})
+
+// Getting
+// DocumentFragment, Element:
+test(function() {
+  var element = document.createElement("div")
+  assert_equals(element.textContent, "")
+}, "For an empty Element, textContent should be the empty string")
+
+test(function() {
+  assert_equals(document.createDocumentFragment().textContent, "")
+}, "For an empty DocumentFragment, textContent should be the empty string")
+
+test(function() {
+  var el = document.createElement("div")
+  el.appendChild(document.createComment(" abc "))
+  el.appendChild(document.createTextNode("\tDEF\t"))
+  el.appendChild(document.createProcessingInstruction("x", " ghi "))
+  assert_equals(el.textContent, "\tDEF\t")
+}, "Element with children")
+
+test(function() {
+  var el = document.createElement("div")
+  var child = document.createElement("div")
+  el.appendChild(child)
+  child.appendChild(document.createComment(" abc "))
+  child.appendChild(document.createTextNode("\tDEF\t"))
+  child.appendChild(document.createProcessingInstruction("x", " ghi "))
+  assert_equals(el.textContent, "\tDEF\t")
+}, "Element with descendants")
+
+test(function() {
+  var df = document.createDocumentFragment()
+  df.appendChild(document.createComment(" abc "))
+  df.appendChild(document.createTextNode("\tDEF\t"))
+  df.appendChild(document.createProcessingInstruction("x", " ghi "))
+  assert_equals(df.textContent, "\tDEF\t")
+}, "DocumentFragment with children")
+
+test(function() {
+  var df = document.createDocumentFragment()
+  var child = document.createElement("div")
+  df.appendChild(child)
+  child.appendChild(document.createComment(" abc "))
+  child.appendChild(document.createTextNode("\tDEF\t"))
+  child.appendChild(document.createProcessingInstruction("x", " ghi "))
+  assert_equals(df.textContent, "\tDEF\t")
+}, "DocumentFragment with descendants")
+
+// Text, ProcessingInstruction, Comment:
+test(function() {
+  assert_equals(document.createTextNode("").textContent, "")
+}, "For an empty Text, textContent should be the empty string")
+
+test(function() {
+  assert_equals(document.createProcessingInstruction("x", "").textContent, "")
+}, "For an empty ProcessingInstruction, textContent should be the empty string")
+
+test(function() {
+  assert_equals(document.createComment("").textContent, "")
+}, "For an empty Comment, textContent should be the empty string")
+
+test(function() {
+  assert_equals(document.createTextNode("abc").textContent, "abc")
+}, "For a Text with data, textContent should be that data")
+
+test(function() {
+  assert_equals(document.createProcessingInstruction("x", "abc").textContent,
+                "abc")
+}, "For a ProcessingInstruction with data, textContent should be that data")
+
+test(function() {
+  assert_equals(document.createComment("abc").textContent, "abc")
+}, "For a Comment with data, textContent should be that data")
+
+// Any other node:
+documents.forEach(function(argument) {
+  var doc = argument[0], creator = argument[1]
+  test(function() {
+    assert_equals(doc.textContent, null)
+  }, "For Documents created by " + creator + ", textContent should be null")
+})
+
+doctypes.forEach(function(argument) {
+  var doctype = argument[0], creator = argument[1]
+  test(function() {
+    assert_equals(doctype.textContent, null)
+  }, "For DocumentType created by " + creator + ", textContent should be null")
+})
+
+// Setting
+// DocumentFragment, Element:
+var testArgs = [
+  [null, null],
+  [undefined, null],
+  ["", null],
+  [42, "42"],
+  ["abc", "abc"],
+  ["<b>xyz<\/b>", "<b>xyz<\/b>"],
+  ["d\0e", "d\0e"]
+  // XXX unpaired surrogate?
+]
+testArgs.forEach(function(aValue) {
+  var argument = aValue[0], expectation = aValue[1]
+  var check = function(aElementOrDocumentFragment) {
+    if (expectation === null) {
+      assert_equals(aElementOrDocumentFragment.textContent, "")
+      assert_equals(aElementOrDocumentFragment.firstChild, null)
+    } else {
+      assert_equals(aElementOrDocumentFragment.textContent, expectation)
+      assert_equals(aElementOrDocumentFragment.childNodes.length, 1,
+                    "Should have one child")
+      var firstChild = aElementOrDocumentFragment.firstChild
+      assert_true(firstChild instanceof Text, "child should be a Text")
+      assert_equals(firstChild.data, expectation)
+    }
+  }
+
+  test(function() {
+    var el = document.createElement("div")
+    el.textContent = argument
+    check(el)
+  }, "Element without children set to " + format_value(argument))
+
+  test(function() {
+    var el = document.createElement("div")
+    var text = el.appendChild(document.createTextNode(""))
+    el.textContent = argument
+    check(el)
+    assert_equals(text.parentNode, null,
+                  "Preexisting Text should have been removed")
+  }, "Element with empty text node as child set to " + format_value(argument))
+
+  test(function() {
+    var el = document.createElement("div")
+    el.appendChild(document.createComment(" abc "))
+    el.appendChild(document.createTextNode("\tDEF\t"))
+    el.appendChild(document.createProcessingInstruction("x", " ghi "))
+    el.textContent = argument
+    check(el)
+  }, "Element with children set to " + format_value(argument))
+
+  test(function() {
+    var el = document.createElement("div")
+    var child = document.createElement("div")
+    el.appendChild(child)
+    child.appendChild(document.createComment(" abc "))
+    child.appendChild(document.createTextNode("\tDEF\t"))
+    child.appendChild(document.createProcessingInstruction("x", " ghi "))
+    el.textContent = argument
+    check(el)
+    assert_equals(child.childNodes.length, 3,
+                  "Should not have changed the internal structure of the removed nodes.")
+  }, "Element with descendants set to " + format_value(argument))
+
+  test(function() {
+    var df = document.createDocumentFragment()
+    df.textContent = argument
+    check(df)
+  }, "DocumentFragment without children set to " + format_value(argument))
+
+  test(function() {
+    var df = document.createDocumentFragment()
+    var text = df.appendChild(document.createTextNode(""))
+    df.textContent = argument
+    check(df)
+    assert_equals(text.parentNode, null,
+                  "Preexisting Text should have been removed")
+  }, "DocumentFragment with empty text node as child set to " + format_value(argument))
+
+  test(function() {
+    var df = document.createDocumentFragment()
+    df.appendChild(document.createComment(" abc "))
+    df.appendChild(document.createTextNode("\tDEF\t"))
+    df.appendChild(document.createProcessingInstruction("x", " ghi "))
+    df.textContent = argument
+    check(df)
+  }, "DocumentFragment with children set to " + format_value(argument))
+
+  test(function() {
+    var df = document.createDocumentFragment()
+    var child = document.createElement("div")
+    df.appendChild(child)
+    child.appendChild(document.createComment(" abc "))
+    child.appendChild(document.createTextNode("\tDEF\t"))
+    child.appendChild(document.createProcessingInstruction("x", " ghi "))
+    df.textContent = argument
+    check(df)
+    assert_equals(child.childNodes.length, 3,
+                  "Should not have changed the internal structure of the removed nodes.")
+  }, "DocumentFragment with descendants set to " + format_value(argument))
+})
+
+// Text, ProcessingInstruction, Comment:
+test(function() {
+  var text = document.createTextNode("abc")
+  text.textContent = "def"
+  assert_equals(text.textContent, "def")
+  assert_equals(text.data, "def")
+}, "For a Text, textContent should set the data")
+
+test(function() {
+  var pi = document.createProcessingInstruction("x", "abc")
+  pi.textContent = "def"
+  assert_equals(pi.textContent, "def")
+  assert_equals(pi.data, "def")
+  assert_equals(pi.target, "x")
+}, "For a ProcessingInstruction, textContent should set the data")
+
+test(function() {
+  var comment = document.createComment("abc")
+  comment.textContent = "def"
+  assert_equals(comment.textContent, "def")
+  assert_equals(comment.data, "def")
+}, "For a Comment, textContent should set the data")
+
+// Any other node:
+documents.forEach(function(argument) {
+  var doc = argument[0], creator = argument[1]
+  test(function() {
+    var root = doc.documentElement
+    doc.textContent = "a"
+    assert_equals(doc.textContent, null)
+    assert_equals(doc.documentElement, root)
+  }, "For Documents created by " + creator + ", setting textContent should do nothing")
+})
+
+doctypes.forEach(function(argument) {
+  var doctype = argument[0], creator = argument[1]
+  test(function() {
+    var props = {
+      name: doctype.name,
+      publicId: doctype.publicId,
+      systemId: doctype.systemId,
+    }
+    doctype.textContent = "b"
+    assert_equals(doctype.textContent, null)
+    assert_equals(doctype.name, props.name, "name should not change")
+    assert_equals(doctype.publicId, props.publicId, "publicId should not change")
+    assert_equals(doctype.systemId, props.systemId, "systemId should not change")
+  }, "For DocumentType created by " + creator + ", setting textContent should do nothing")
+})
+
+</script>
