def METHOD_NAME():
    client = boto3.client("dms", region_name="us-east-1")
    with pytest.raises(ClientError) as ex:
        client.start_replication_task(
            ReplicationTaskArn="does-not-exist",
            StartReplicationTaskType="start-replication",
        )
    assert ex.value.operation_name == "StartReplicationTask"
    assert ex.value.response["Error"]["Code"] == "ResourceNotFoundFault"
    assert (
        ex.value.response["Error"]["Message"] == "Replication task could not be found."
    )