old_contents: from __future__ import print_function
  
  import sys
  import unittest
  
  import keyring.backends.Windows
  from ..test_backend import BackendBasicTests
  
  
  @unittest.skipUnless(keyring.backends.Windows.WinVaultKeyring.viable,
      "Needs Windows")
  class WinVaultKeyringTestCase(BackendBasicTests, unittest.TestCase):
      def tearDown(self):
          # clean up any credentials created
          for cred in self.credentials_created:
              try:
                  self.keyring.delete_password(*cred)
              except Exception as e:
                  print(e, file=sys.stderr)
  
      def init_keyring(self):
          return keyring.backends.Windows.WinVaultKeyring()
  
new_contents: from __future__ import print_function
  
  import sys
  import unittest
  
  import pytest
  
  import keyring.backends.Windows
  from ..test_backend import BackendBasicTests
  
  
  @unittest.skipUnless(keyring.backends.Windows.WinVaultKeyring.viable,
      "Needs Windows")
  class WinVaultKeyringTestCase(BackendBasicTests, unittest.TestCase):
      def tearDown(self):
          # clean up any credentials created
          for cred in self.credentials_created:
              try:
                  self.keyring.delete_password(*cred)
              except Exception as e:
                  print(e, file=sys.stderr)
  
      def init_keyring(self):
          return keyring.backends.Windows.WinVaultKeyring()
  
  
  @pytest.mark.skipif('sys.platform != "win32"')
  def test_winvault_always_viable():
      """
      The WinVault backend should always be viable on Windows.
      """
      assert keyring.backends.Windows.WinVaultKeyring.viable
  
subject: Add a test to ensure winvault is always viable on Windows. Ref #278.