Test IndexedDB's IDBObjectStore.deleteObjectStore(). 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; dbname = "objectstore-removeobjectstore.html" indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) store = db.createObjectStore('storeName', null) store.createIndex('indexName', '') PASS store.indexNames.contains('indexName') is true store.add('value', 'key') db.transaction(['storeName']) store = transaction.objectStore('storeName') store.get('key') PASS event.target.result is "value" db.close() indexedDB.open(dbname, 2) db.deleteObjectStore('storeName') db.createObjectStore('storeName', null) db.transaction(['storeName']) store = transaction.objectStore('storeName') store.get('key') PASS event.target.result is undefined PASS event.target.source.indexNames.contains('indexName') is false PASS successfullyParsed is true TEST COMPLETE