@Before
public void setup() {
BriefLogFormatter.init();
Utils.setMockClock();
group = new KeyChainGroup(params);
group.setLookaheadSize(LOOKAHEAD_SIZE); // Don't want slow tests.
group.getActiveKeyChain(); // Force create a chain.
watchingAccountKey = DeterministicKey.deserializeB58(null, XPUB);
}