message: Use `typing.Tuple` instead of `tuple` in type hints.
diff: # limitations under the License.
  """Cross-language tests for the KMS Envelope AEAD primitive with AWS and GCP."""
  -from typing import Dict, Iterable
  +from typing import Dict, Iterable, Tuple
  from absl.testing import absltest
  from absl.testing import parameterized
  @@ -29,7 +29,7 @@ _GCP_KEY_URI = ('gcp-kms://projects/tink-test-infrastructure/locations/global/'
  'keyRings/unit-and-integration-testing/cryptoKeys/aead-key')
  -def _templates() -> Dict[str, tuple[tink_pb2.KeyTemplate, str]]:
  +def _templates() -> Dict[str, Tuple[tink_pb2.KeyTemplate, str]]:
  """For each KMS envelope AEAD template name maps the key template and DEK AEAD key type."""
  kms_key_templates = {}
  for aead_key_type in supported_key_types.AEAD_KEY_TYPES:
  @@ -72,7 +72,7 @@ def _test_cases() -> Iterable[str]:
  def _get_plaintext_and_aad(key_template_name: str,
  - lang: str) -> tuple[bytes, bytes]:
  + lang: str) -> Tuple[bytes, bytes]:
  """Creates test plaintext and associated data from a key template and lang."""
  plaintext = (
  b'This is some plaintext message to be encrypted using key_template '
  