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diff --git a/testing/web-platform/tests/IndexedDB/idbobjectstore-delete-exception-order.html b/testing/web-platform/tests/IndexedDB/idbobjectstore-delete-exception-order.html
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+++ b/testing/web-platform/tests/IndexedDB/idbobjectstore-delete-exception-order.html
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+<!doctype html>
+<meta charset=utf-8>
+<title>IndexedDB: IDBObjectStore delete() Exception Ordering</title>
+<link rel="help" href="https://w3c.github.io/IndexedDB/#dom-idbobjectstore-delete">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="resources/support.js"></script>
+<script>
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+    const store2 = db.createObjectStore('s2');
+
+    db.deleteObjectStore('s2');
+
+    setTimeout(t.step_func(() => {
+      assert_throws_dom(
+        'InvalidStateError', () => { store2.delete('key'); },
+        '"has been deleted" check (InvalidStateError) should precede ' +
+        '"not active" check (TransactionInactiveError)');
+      t.done();
+    }), 0);
+  },
+  (t, db) => {},
+  'IDBObjectStore.delete exception order: ' +
+  'InvalidStateError vs. TransactionInactiveError'
+);
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+  },
+  (t, db) => {
+    const tx = db.transaction('s', 'readonly', {durability: 'relaxed'});
+    const store = tx.objectStore('s');
+
+    setTimeout(t.step_func(() => {
+      assert_throws_dom(
+        'TransactionInactiveError', () => { store.delete('key'); },
+        '"not active" check (TransactionInactiveError) should precede ' +
+        '"read only" check (ReadOnlyError)');
+      t.done();
+    }), 0);
+  },
+  'IDBObjectStore.delete exception order: ' +
+  'TransactionInactiveError vs. ReadOnlyError'
+);
+
+indexeddb_test(
+  (t, db) => {
+    const store = db.createObjectStore('s');
+  },
+  (t, db) => {
+    const tx = db.transaction('s', 'readonly', {durability: 'relaxed'});
+    const store = tx.objectStore('s');
+
+    assert_throws_dom(
+      'ReadOnlyError', () => { store.delete({}); },
+      '"read only" check (ReadOnlyError) should precede ' +
+      'key/data check (DataError)');
+
+    t.done();
+  },
+  'IDBObjectStore.delete exception order: ' +
+  'ReadOnlyError vs. DataError'
+);
+
+</script>