diff --git a/tests/wpt/metadata/MANIFEST.json b/tests/wpt/metadata/MANIFEST.json
index 32f8cbe9300..28194a3df92 100644
--- a/tests/wpt/metadata/MANIFEST.json
+++ b/tests/wpt/metadata/MANIFEST.json
@@ -29947,7 +29947,16 @@
   },
   "local_changes": {
     "deleted": [],
-    "items": {},
+    "items": {
+      "testharness": {
+        "html/semantics/forms/form-submission-0/url-encoded.html": [
+          {
+            "path": "html/semantics/forms/form-submission-0/url-encoded.html",
+            "url": "/html/semantics/forms/form-submission-0/url-encoded.html"
+          }
+        ]
+      }
+    },
     "reftest_nodes": {}
   },
   "reftest_nodes": {
diff --git a/tests/wpt/metadata/html/semantics/forms/form-submission-0/url-encoded.html.ini b/tests/wpt/metadata/html/semantics/forms/form-submission-0/url-encoded.html.ini
new file mode 100644
index 00000000000..4f322ca7011
--- /dev/null
+++ b/tests/wpt/metadata/html/semantics/forms/form-submission-0/url-encoded.html.ini
@@ -0,0 +1,5 @@
+[url-encoded.html]
+  type: testharness
+  [textarea.simple]
+    expected: FAIL
+
diff --git a/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/url-encoded.html b/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/url-encoded.html
new file mode 100644
index 00000000000..5965b66330b
--- /dev/null
+++ b/tests/wpt/web-platform-tests/html/semantics/forms/form-submission-0/url-encoded.html
@@ -0,0 +1,46 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<iframe id=testframe src="/common/blank.html"></iframe>
+<script>
+var simple_tests = [
+  {
+    name: "text.simple",
+    input: "<input name=foo value=bara>",
+    output: "foo=bara"
+  },
+  {
+    name: "textarea.simple",
+    input: "<textarea name=foo>bar</textarea>",
+    output: "foo=bar"
+  },
+];
+simple_tests.forEach(function(test_obj) {
+  test_obj.test = async_test(test_obj.name);
+});
+function run_simple_test() {
+  if (simple_tests.length == 0) {
+    return;
+  }
+  test_obj = simple_tests.pop();
+  var t = test_obj.test;
+  var testframe = document.getElementById("testframe");
+  var testdocument = testframe.contentWindow.document;
+  testdocument.body.innerHTML =
+    "<form id=testform action=\"/common/blank.html\">" +
+    test_obj.input +
+    "</form>";
+  testframe.onload = function() {
+    t.step(function (){
+      var get_url = testframe.contentWindow.location.toString();
+      var encoded = get_url.substr(get_url.indexOf("?") + 1);
+      assert_equals(encoded, test_obj.output);
+    });
+    t.done();
+    run_simple_test();
+  };
+  testdocument.getElementById("testform").submit();
+}
+document.getElementById("testframe").onload = run_simple_test;
+</script>
