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diff --git a/testing/web-platform/tests/fetch/api/headers/headers-normalize.html b/testing/web-platform/tests/fetch/api/headers/headers-normalize.html
new file mode 100644
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--- /dev/null
+++ b/testing/web-platform/tests/fetch/api/headers/headers-normalize.html
@@ -0,0 +1,47 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>Headers normalize values</title>
+    <meta name="help" href="https://fetch.spec.whatwg.org/#concept-header-value-normalize">
+    <meta name="author" title="Canon Research France" href="https://www.crf.canon.fr">
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <script>
+      var headerDictWS = {"name1": " space ",
+                          "name2": "\ttab\t",
+                          "name3": " spaceAndTab\t",
+                          "name4": "\r\n newLine", //obs-fold cases
+                          "name5": "newLine\r\n ",
+                          "name6": "\r\n\tnewLine",
+                         };
+
+      test(function() {
+        var headers = new Headers(headerDictWS);
+        for (name in headerDictWS)
+          assert_equals(headers.get(name), headerDictWS[name].trim(),
+            "name: " + name + " has normalized value: " + headerDictWS[name].trim());
+      }, "Create headers with not normalized values");
+
+      test(function() {
+        var headers = new Headers();
+        for (name in headerDictWS) {
+          headers.append(name, headerDictWS[name]);
+          assert_equals(headers.get(name), headerDictWS[name].trim(),
+            "name: " + name + " has value: " + headerDictWS[name].trim());
+        }
+      }, "Check append method with not normalized values");
+
+      test(function() {
+        var headers = new Headers();
+        for (name in headerDictWS) {
+          headers.set(name, headerDictWS[name]);
+          assert_equals(headers.get(name), headerDictWS[name].trim(),
+            "name: " + name + " has value: " + headerDictWS[name].trim());
+        }
+      }, "Check set method with not normalized values");
+    </script>
+  </body>
+</html>