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diff --git a/test/wpt/tests/xhr/firing-events-http-no-content-length.html b/test/wpt/tests/xhr/firing-events-http-no-content-length.html
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index 0000000..ddf7dd8
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+++ b/test/wpt/tests/xhr/firing-events-http-no-content-length.html
@@ -0,0 +1,35 @@
+<!doctype html>
+<html>
+  <head>
+    <title>ProgressEvent: firing events for HTTP with no Content-Length</title>
+    <script src="/resources/testharness.js"></script>
+    <script src="/resources/testharnessreport.js"></script>
+  </head>
+  <body>
+    <div id="log"></div>
+    <script>
+      async_test(t => {
+        const xhr = new XMLHttpRequest();
+        let progressHappened = false;
+
+        xhr.onprogress = t.step_func(pe => {
+          assert_equals(pe.type, "progress");
+          assert_greater_than_equal(pe.loaded, 0, "loaded");
+          assert_false(pe.lengthComputable, "lengthComputable");
+          assert_equals(pe.total, 0, "total");
+          progressHappened = true;
+        });
+
+        // "loadstart", "error", "abort", "load" tests are out of scope.
+        // They SHOULD be tested in each spec that implement ProgressEvent.
+
+        xhr.onloadend = t.step_func_done(() => {
+          assert_true(progressHappened);
+        });
+
+        xhr.open("GET", "resources/trickle.py?ms=0&count=100", true);
+        xhr.send(null);
+      });
+    </script>
+  </body>
+</html>