def METHOD_NAME(
    self, mock_boto3_session: MagicMock, mock_sso_botocore_session: MagicMock
) -> None:
    """Test get_session with region."""
    ctx = BaseContext(deploy_environment=self.env)
    assert ctx.get_session(region="us-east-2") == mock_boto3_session.return_value
    mock_boto3_session.assert_called_once_with(
        aws_access_key_id=self.env.vars["AWS_ACCESS_KEY_ID"],
        aws_secret_access_key=self.env.vars["AWS_SECRET_ACCESS_KEY"],
        aws_session_token=self.env.vars["AWS_SESSION_TOKEN"],
        botocore_session=mock_sso_botocore_session.return_value,
        region_name="us-east-2",
        profile_name=None,
    )