Test IndexedDB's event interfaces. 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; PASS 'IDBVersionChangeEvent' in self is true FAIL 'oldVersion' in document.createEvent('IDBVersionChangeEvent') should be true. Threw exception NotSupportedError (DOM Exception 9): The operation is not supported. FAIL 'newVersion' in document.createEvent('IDBVersionChangeEvent') should be true. Threw exception NotSupportedError (DOM Exception 9): The operation is not supported. PASS successfullyParsed is true Some tests failed. TEST COMPLETE