async def METHOD_NAME(self):
    ui = utilities.make_ui()
    envelope = Envelope()
    envelope['From'] = 'test@example.com'
    envelope['To'] = 'ambig@example.com'
    gpg_key = crypto.get_key(FPR)
    account = _Account(encrypt_to_self=True, gpg_key=gpg_key)
    envelope.account = account
    await utils.update_keys(ui, envelope)
    self.assertTrue(envelope.encrypt)
    self.assertIn(FPR, envelope.encrypt_keys)
    self.assertEqual(gpg_key, envelope.encrypt_keys[FPR])