old_contents: import base64
  
  import unittest2
  from boto.kms.exceptions import InvalidCiphertextException
  from cfn_sphere.aws.kms import KMS
  from mock import patch
  from cfn_sphere.exceptions import InvalidEncryptedValueException
  
  
  class KMSTests(unittest2.TestCase):
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_decrypt_value(self, kms_mock):
          kms_mock.return_value.decrypt.return_value = {'Plaintext': 'decryptedValue'}
  
          self.assertEqual('decryptedValue', KMS().decrypt("ZW5jcnlwdGVkVmFsdWU="))
          kms_mock.return_value.decrypt.assert_called_once_with(base64.b64decode("ZW5jcnlwdGVkVmFsdWU="))
  
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_invalid_base64(self, kms_mock):
          with self.assertRaises(InvalidEncryptedValueException):
              KMS().decrypt("asdqwda")
  
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_invalid_kms_key(self, kms_mock):
          kms_mock.return_value.decrypt.side_effect = InvalidCiphertextException("400", "Bad Request")
  
          with self.assertRaises(InvalidEncryptedValueException):
              KMS().decrypt("ZW5jcnlwdGVkVmFsdWU=")
  
new_contents: import base64
  
  import unittest2
  from boto.kms.exceptions import InvalidCiphertextException
  from cfn_sphere.aws.kms import KMS
  from mock import patch
  from cfn_sphere.exceptions import InvalidEncryptedValueException
  
  
  class KMSTests(unittest2.TestCase):
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_decrypt_value(self, kms_mock):
          kms_mock.return_value.decrypt.return_value = {'Plaintext': 'decryptedValue'}
  
          self.assertEqual('decryptedValue', KMS().decrypt("ZW5jcnlwdGVkVmFsdWU="))
          kms_mock.return_value.decrypt.assert_called_once_with(base64.b64decode("ZW5jcnlwdGVkVmFsdWU=".encode()))
  
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_invalid_base64(self, kms_mock):
          with self.assertRaises(InvalidEncryptedValueException):
              KMS().decrypt("asdqwda")
  
      @patch('cfn_sphere.aws.kms.kms.connect_to_region')
      def test_invalid_kms_key(self, kms_mock):
          kms_mock.return_value.decrypt.side_effect = InvalidCiphertextException("400", "Bad Request")
  
          with self.assertRaises(InvalidEncryptedValueException):
              KMS().decrypt("ZW5jcnlwdGVkVmFsdWU=")
  
subject: fix pypy3 base64 encoding test