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diff --git a/testing/web-platform/tests/html/semantics/forms/the-input-element/valueMode.html b/testing/web-platform/tests/html/semantics/forms/the-input-element/valueMode.html
new file mode 100644
index 000000000..709c176dd
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/forms/the-input-element/valueMode.html
@@ -0,0 +1,72 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Input element value mode</title>
+<link rel="author" title="Denis Ah-Kang" href="mailto:denis@w3.org">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+  var types = [
+    { type: "hidden", mode: "default" },
+    { type: "text", mode: "value", sanitizedValue: "foo" },
+    { type: "search", mode: "value", sanitizedValue: "foo" },
+    { type: "tel", mode: "value", sanitizedValue: "foo" },
+    { type: "url", mode: "value", sanitizedValue: "foo" },
+    { type: "email", mode: "value", sanitizedValue: "foo" },
+    { type: "password", mode: "value", sanitizedValue: "foo" },
+    { type: "datetime-local", mode: "value", sanitizedValue: "" },
+    { type: "date", mode: "value", sanitizedValue: "" },
+    { type: "month", mode: "value", sanitizedValue: "" },
+    { type: "week", mode: "value", sanitizedValue: "" },
+    { type: "time", mode: "value", sanitizedValue: "" },
+    { type: "number", mode: "value", sanitizedValue: "" },
+    { type: "range", mode: "value", sanitizedValue: "50" },
+    { type: "color", mode: "value", sanitizedValue: "#000000" },
+    { type: "checkbox", mode: "default/on" },
+    { type: "radio", mode: "default/on" },
+    { type: "submit", mode: "default" },
+    { type: "image", mode: "default" },
+    { type: "reset", mode: "default" },
+    { type: "button", mode: "default" }
+  ];
+  for (var i = 0; i < types.length; i++) {
+    test(function() {
+      var input = document.createElement("input"),
+          expected;
+      input.type = types[i].type;
+      input.value = "foo";
+      switch(types[i].mode) {
+        case "default":
+          expected = "";
+          break;
+        case "default/on":
+          expected = "on";
+          break;
+        case "value":
+          expected = types[i].sanitizedValue;
+          break;
+      }
+      assert_equals(input.value, expected);
+    }, "value IDL attribute of input type " + types[i].type + " without value attribute");
+
+    test(function() {
+      var input = document.createElement("input"),
+          expected;
+      input.type = types[i].type;
+      input.setAttribute("value", "bar");
+      input.value = "foo";
+      switch(types[i].mode) {
+        case "default":
+          expected = "bar";
+          break;
+        case "default/on":
+          expected = "bar";
+          break;
+        case "value":
+          expected = types[i].sanitizedValue;
+          break;
+      }
+      assert_equals(input.value, expected);
+    }, "value IDL attribute of input type " + types[i].type + " with value attribute");
+  }
+</script>