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diff --git a/testing/web-platform/tests/IndexedDB/idbobjectstore_put3.htm b/testing/web-platform/tests/IndexedDB/idbobjectstore_put3.htm
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index 0000000000..b7792bdaf1
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+++ b/testing/web-platform/tests/IndexedDB/idbobjectstore_put3.htm
@@ -0,0 +1,48 @@
+<!DOCTYPE html>
+<meta charset="utf-8">
+<title>IDBObjectStore.put() - record with same key already exists </title>
+<link rel="author" title="Microsoft" href="http://www.microsoft.com">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/support.js"></script>
+
+<script>
+    var db, success_event,
+      t = async_test(),
+      record = { key: 1, property: "data" },
+      record_put = { key: 1, property: "changed", more: ["stuff", 2] };
+
+    var open_rq = createdb(t);
+    open_rq.onupgradeneeded = function(e) {
+        db = e.target.result;
+        var objStore = db.createObjectStore("store", { keyPath: "key" });
+        objStore.put(record);
+
+        var rq = objStore.put(record_put);
+        rq.onerror = fail(t, "error on put");
+
+        rq.onsuccess = t.step_func(function(e) {
+            success_event = true;
+        });
+    };
+
+    open_rq.onsuccess = function(e) {
+        assert_true(success_event);
+
+        var rq = db.transaction("store", "readonly", {durability: 'relaxed'})
+                   .objectStore("store")
+                   .get(1);
+
+        rq.onsuccess = t.step_func(function(e) {
+            var rec = e.target.result;
+
+            assert_equals(rec.key, record_put.key);
+            assert_equals(rec.property, record_put.property);
+            assert_array_equals(rec.more, record_put.more);
+
+            t.done();
+        });
+    };
+</script>
+
+<div id="log"></div>