Test IndexedDB deleteObjectStore required argument 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 = "deleteObjectStore-name-argument-required.html" indexedDB.deleteDatabase(dbname) indexedDB.open(dbname) PASS db.deleteObjectStore(); threw exception TypeError: Not enough arguments. PASS successfullyParsed is true TEST COMPLETE