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diff --git a/testing/web-platform/tests/IndexedDB/idbdatabase-deleteObjectStore-exception-order.htm b/testing/web-platform/tests/IndexedDB/idbdatabase-deleteObjectStore-exception-order.htm
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+++ b/testing/web-platform/tests/IndexedDB/idbdatabase-deleteObjectStore-exception-order.htm
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+<!DOCTYPE html>
+<title>IndexedDB: IDBDatabase deleteObjectStore() Exception Ordering</title>
+<meta charset=utf-8>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#dom-idbdatabase-deleteobjectstore">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db, txn) => {
+    db.createObjectStore('s');
+    txn.onabort = () => {
+      setTimeout(t.step_func(() => {
+        assert_throws_dom(
+          'InvalidStateError', () => { db.deleteObjectStore('s'); },
+          '"running an upgrade transaction" check (InvalidStateError) ' +
+          'should precede "not active" check (TransactionInactiveError)');
+        t.done();
+      }), 0);
+    };
+    txn.abort();
+  },
+  (t, db) => { t.assert_unreached('open should fail'); },
+  'IDBDatabase.deleteObjectStore exception order: ' +
+  'InvalidStateError vs. TransactionInactiveError',
+  { upgrade_will_abort: true }
+);
+
+indexeddb_test(
+  (t, db, txn) => {
+    txn.abort();
+    assert_throws_dom(
+      'TransactionInactiveError', () => { db.deleteObjectStore('nope'); },
+      '"not active" check (TransactionInactiveError) should precede ' +
+      '"name in database" check (NotFoundError)');
+    t.done();
+  },
+  (t, db) => { t.assert_unreached('open should fail'); },
+  'IDBDatabase.deleteObjectStore exception order: ' +
+  'TransactionInactiveError vs. NotFoundError',
+  { upgrade_will_abort: true }
+);
+
+</script>