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diff --git a/testing/web-platform/tests/IndexedDB/idbindex-request-source.html b/testing/web-platform/tests/IndexedDB/idbindex-request-source.html
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--- /dev/null
+++ b/testing/web-platform/tests/IndexedDB/idbindex-request-source.html
@@ -0,0 +1,34 @@
+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: The source of requests made against indexes</title>
+<meta name="help" href="https://w3c.github.io/IndexedDB/#dom-idbrequest-source">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/support.js"></script>
+<script>
+
+[
+  index => index.get(0),
+  index => index.getKey(0),
+  index => index.getAll(),
+  index => index.getAllKeys(),
+  index => index.count(),
+
+  index => index.openCursor(),
+  index => index.openKeyCursor()
+].forEach(func => indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('store', {autoIncrement: true});
+    store.createIndex('index', 'kp');
+  },
+  (t, db) => {
+    const tx = db.transaction('store', 'readwrite', {durability: 'relaxed'});
+    const index = tx.objectStore('store').index('index');
+    assert_equals(func(index).source, index,
+                  `${func}.source should be the index itself`);
+    t.done();
+  },
+  `The source of the request from ${func} is the index itself`
+));
+
+</script>