tests: Make updatecoins_simulation_test deterministic

src/test/coins_tests.cpp

@@ -279,6 +279,8 @@ UtxoData::iterator FindRandomFrom(const std::set<COutPoint> &utxoSet) {
 // has the expected effect (the other duplicate is overwritten at all cache levels)
 BOOST_AUTO_TEST_CASE(updatecoins_simulation_test)
 {
+    SeedInsecureRand(/* deterministic */ true);
+
     bool spent_a_duplicate_coinbase = false;
     // A simple map to track what we expect the cache stack to represent.
     std::map<COutPoint, Coin> result;