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diff --git a/testing/web-platform/tests/html/semantics/forms/the-input-element/cloning-steps.html b/testing/web-platform/tests/html/semantics/forms/the-input-element/cloning-steps.html
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+++ b/testing/web-platform/tests/html/semantics/forms/the-input-element/cloning-steps.html
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+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>Cloning of input elements</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">
+<link rel="help" href="https://dom.spec.whatwg.org/#concept-node-clone-ext">
+<link rel="help" href="https://html.spec.whatwg.org/multipage/forms.html#the-input-element:concept-node-clone-ext">
+<link rel="author" title="Matthew Phillips" href="mailto:matthew@matthewphillips.info">
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+
+<script type=module>
+import inputTypes from "./input-types.js";
+
+test(function() {
+  var input = document.createElement("input");
+  input.value = "foo bar";
+
+  var copy = input.cloneNode();
+  assert_equals(copy.value, "foo bar");
+}, "input element's value should be cloned");
+
+test(function() {
+  var input = document.createElement("input");
+  input.value = "foo bar";
+
+  var copy = input.cloneNode();
+  copy.setAttribute("value", "something else");
+
+  assert_equals(copy.value, "foo bar");
+}, "input element's dirty value flag should be cloned, so setAttribute doesn't affect the cloned input's value");
+
+for (const inputType of inputTypes) {
+  test(function() {
+    var input = document.createElement("input");
+    input.setAttribute("type", inputType);
+    input.indeterminate = true;
+
+    var copy = input.cloneNode();
+    assert_equals(copy.indeterminate, true);
+  }, `input[type=${inputType}] element's indeterminateness should be cloned`);
+
+  test(function() {
+    var input = document.createElement("input");
+    input.setAttribute("type", inputType);
+    input.checked = true;
+
+    var copy = input.cloneNode();
+    assert_equals(copy.checked, true);
+  }, `input[type=${inputType}] element's checkedness should be cloned`);
+
+  test(function() {
+    var input = document.createElement("input");
+    input.setAttribute("type", inputType);
+    input.checked = false;
+
+    var copy = input.cloneNode();
+    copy.setAttribute("checked", "checked");
+
+    assert_equals(copy.checked, false);
+  }, `input[type=${inputType}] element's dirty checkedness should be cloned, so setAttribute doesn't affect the cloned input's checkedness`);
+}
+</script>