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diff --git a/testing/web-platform/tests/html/semantics/embedded-content/media-elements/networkState_during_progress.html b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/networkState_during_progress.html
new file mode 100644
index 0000000000..db9df23cb6
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+++ b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/networkState_during_progress.html
@@ -0,0 +1,42 @@
+<!doctype html>
+<html>
+ <head>
+  <title>{audio,video}.networkState - NETWORK_LOADING</title>
+  <script src="/resources/testharness.js"></script>
+  <script src="/resources/testharnessreport.js"></script>
+  <script src="/common/media.js"></script>
+ </head>
+ <body>
+  <p><a href="https://html.spec.whatwg.org/multipage/#dom-media-networkstate">spec reference</a></p>
+  <audio id="a" autoplay controls>
+  </audio>
+  <video id="v" autoplay controls>
+  </video>
+  <div id="log"></div>
+  <script>
+test(function() {
+  var ta = async_test("audioElement.networkState should be NETWORK_LOADING during progress event");
+  var a = document.getElementById("a");
+  a.addEventListener("error", ta.unreached_func());
+  a.addEventListener("progress", ta.step_func(function() {
+    assert_equals(a.networkState, a.NETWORK_LOADING);
+    ta.done();
+    a.pause();
+  }), false);
+  a.src = getAudioURI("/media/sound_5") + "?" + new Date() + Math.random();
+}, "audio events - networkState during progress");
+
+test(function() {
+  var tv = async_test("videoElement.networkState should be NETWORK_LOADING during progress event");
+  var v = document.getElementById("v");
+  v.addEventListener("error", tv.unreached_func());
+  v.addEventListener("progress", tv.step_func(function() {
+    assert_equals(v.networkState, v.NETWORK_LOADING);
+    tv.done();
+    v.pause();
+  }), false);
+  v.src = getVideoURI("/media/movie_5") + "?" + new Date() + Math.random();
+}, "video events - networkState during progress");
+  </script>
+ </body>
+</html>