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diff --git a/testing/web-platform/tests/html/semantics/forms/the-input-element/week.html b/testing/web-platform/tests/html/semantics/forms/the-input-element/week.html
new file mode 100644
index 0000000000..925acfdaf8
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+++ b/testing/web-platform/tests/html/semantics/forms/the-input-element/week.html
@@ -0,0 +1,41 @@
+<!DOCTYPE html>
+<meta charset=utf-8>
+<title>Form input type=week</title>
+<link rel="author" title="Denis Ah-Kang" href="mailto:denis@w3.org">
+<link rel=help href="https://html.spec.whatwg.org/multipage/#weeks">
+<link rel=help href="https://html.spec.whatwg.org/multipage/#week-state-(type=week)">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<div id="log"></div>
+<script>
+  var weeks = [
+    {value: "", expected: "", testname: "empty value"},
+    {value: "2014-W52", expected: "2014-W52", testname: "Valid value: Value should be 2014-W52"},
+    {value: "2014-W53", expected: "", testname: "2014 has 52 weeks: Value should be empty"},
+    {value: "2015-W53", expected: "2015-W53", testname: "2015 has 53 weeks: Value should be 2015-W53"},
+    {value: "2014", expected: "", testname: "Invalid value: year only"},
+    {value: "2014W", expected: "", testname: "Invalid value: no week number"},
+    {value: "2014W52", expected: "", testname: "Invalid value: no '-' (U+002D)"},
+    {value: "-W52", expected: "", testname: "Invalid value: yearless week"},
+    {value: "2017-w52", expected: "", testname: "Invalid value: should be capital letter 'W'"},
+    {value: "2017-W52-", expected: "", testname: "Invalid value: incorrect with '-' at the end"},
+    {value: "2017-W52-12", expected: "", testname: "Invalid value: value should be two parts"},
+    {value: "W52", expected: "", testname: "Invalid value: yearless week and no '-' (U+002D)"},
+    {value: "2014-W03", attributes: { min: "2014-W02" }, expected: "2014-W03", testname: "Value >= min attribute"},
+    {value: "2014-W01", attributes: { min: "2014-W02" }, expected: "2014-W01", testname: "Value < min attribute"},
+    {value: "2014-W10", attributes: { max: "2014-W11" }, expected: "2014-W10", testname: "Value <= max attribute"},
+    {value: "2014-W12", attributes: { max: "2014-W11" }, expected: "2014-W12", testname: "Value > max attribute"}
+  ];
+  for (var i = 0; i < weeks.length; i++) {
+    var w = weeks[i];
+    test(function() {
+      var input = document.createElement("input");
+      input.type = "week";
+      input.value = w.value;
+      for(var attr in w.attributes) {
+        input[attr] = w.attributes[attr];
+      }
+      assert_equals(input.value, w.expected);
+    }, w.testname);
+  }
+</script>