When a versionchange transaction is aborted, the version and newly created object stores should be reset On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". indexedDB = self.indexedDB || self.webkitIndexedDB || self.mozIndexedDB || self.msIndexedDB || self.OIndexedDB; indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) objectStore = db.createObjectStore('foo'); PASS db.objectStoreNames.length is 1 index = objectStore.createIndex('bar', 'baz'); PASS objectStore.indexNames.length is 1 event.target.transaction.abort(); PASS db.version is 0 PASS db.objectStoreNames.length is 0 PASS successfullyParsed is true TEST COMPLETE