Keep the `LargestFirst` coin selection for the tests, to make them more
predictable.
/// Default coin selection algorithm used by [`TxBuilder`](super::tx_builder::TxBuilder) if not
/// overridden
-pub type DefaultCoinSelectionAlgorithm = LargestFirstCoinSelection;
+#[cfg(not(test))]
+pub type DefaultCoinSelectionAlgorithm = BranchAndBoundCoinSelection;
+#[cfg(test)]
+pub type DefaultCoinSelectionAlgorithm = LargestFirstCoinSelection; // make the tests more predictable
/// Result of a successful coin selection
#[derive(Debug)]