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diff --git a/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/MutationEvent.relatedNode.html b/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/MutationEvent.relatedNode.html
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+++ b/testing/web-platform/tests/uievents/legacy-domevents-tests/submissions/Microsoft/MutationEvent.relatedNode.html
@@ -0,0 +1,76 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title id='desc'> MutationEvent.relatedNode for DOMNodeInserted and DOMNodeRemoved </title>
+        <script type="text/javascript">
+            var PassTest = function()
+            {
+                document.getElementById("testresult").firstChild.data = "PASS";
+            }
+
+            var FailTest = function()
+            {
+                document.getElementById("testresult").firstChild.data = "FAIL";
+            }
+
+            var EVENT1 = "DOMNodeInserted";
+            var EVENT2 = "DOMNodeRemoved";
+            var TARGET;
+            var PARENT;
+            var NODE;
+            var ActualResult = [];
+            var ExpectResult = [];
+
+            window.onload = function()
+            {
+                try
+                {
+                    TARGET = document.getElementById("target");
+                    PARENT = document.getElementById("parent");
+                    TARGET.addEventListener(EVENT1, TestEvent, true);
+                    TARGET.addEventListener(EVENT2, TestEvent, true);
+
+                    ExpectResult = [TARGET, PARENT];
+
+                    NODE = document.createElement("INPUT");
+                    TARGET.appendChild(NODE);
+                    PARENT.removeChild(TARGET);
+                }
+                catch(ex)
+                {
+                    FailTest();
+                }
+            }
+
+            function TestEvent(evt)
+            {
+                ActualResult.push(evt.relatedNode);
+
+                if (ExpectResult.toString() == ActualResult.toString())
+                {
+                    PassTest();
+                }
+
+                if (2 < ActualResult.length)
+                {
+                    FailTest();
+                }
+            }
+        </script>
+    </head>
+    <body>
+        <h3>DOM Events</h3>
+        <h4>
+            Test Description: MutationEvent.relatedNode is the parent node of the node being removed for DOMNodeRemoved event;
+            and, it is the parent node of the node that has been inserted for DOMNodeInserted event
+        </h4>
+
+        <span id="parent">
+            <div id="target" style="border:solid 1px green; width:200px; height:50px">
+            </div>
+        </span>
+        <p>Test passes if the word "PASS" appears below.</p>
+        <div>Test result: </div>
+        <div id='testresult'>FAIL</div>
+    </body>
+</html>
+\ No newline at end of file