)
  }

  #[test]
  fn excess_additional_postage_is_stripped() {
    let utxos = vec![
      (outpoint(1), Amount::from_sat(5_000)),
      (outpoint(2), Amount::from_sat(25_000)),
    ];

    pretty_assert_eq!(
      TransactionBuilder::new(
        satpoint(1, 4_950),
        BTreeMap::new(),
        utxos.into_iter().collect(),
        BTreeSet::new(),
        recipient(),
        [change(0), change(1)],
        FeeRate::try_from(1.0).unwrap(),
        Target::Postage,
      )
      .build_transaction(),
      Ok(Transaction {
        version: 1,
        lock_time: LockTime::ZERO,
        input: vec![tx_in(outpoint(1)), tx_in(outpoint(2))],
        output: vec![
          tx_out(4_950, change(1)),
          tx_out(TransactionBuilder::TARGET_POSTAGE.to_sat(), recipient()),
          tx_out(14_831, change(0)),
        ],
      })
    )
  }

  #[test]
  #[should_panic(expected = "invariant: outgoing sat is contained in utxos")]
  fn invariant_satpoint_outpoint_is_contained_in_utxos() {
    TransactionBuilder::new(