diff --git a/src/test/key_tests.cpp b/src/test/key_tests.cpp
index d864ca8be..5f72b25a7 100644
--- a/src/test/key_tests.cpp
+++ b/src/test/key_tests.cpp
@@ -223,11 +223,13 @@ BOOST_AUTO_TEST_CASE(zc_address_test)
 
 BOOST_AUTO_TEST_CASE(zs_address_test)
 {
+    SelectParams(CBaseChainParams::REGTEST);
+
     for (size_t i = 0; i < 1000; i++) {
         auto sk = SaplingSpendingKey::random();
         {
             std::string sk_string = EncodeSpendingKey(sk);
-            BOOST_CHECK(sk_string.compare(0, 24, Params().Bech32HRP(CChainParams::SAPLING_SPENDING_KEY)) == 0);
+            BOOST_CHECK(sk_string.compare(0, 27, Params().Bech32HRP(CChainParams::SAPLING_SPENDING_KEY)) == 0);
 
             auto spendingkey2 = DecodeSpendingKey(sk_string);
             BOOST_CHECK(IsValidSpendingKey(spendingkey2));
@@ -240,7 +242,7 @@ BOOST_AUTO_TEST_CASE(zs_address_test)
             auto addr = sk.default_address();
 
             std::string addr_string = EncodePaymentAddress(addr);
-            BOOST_CHECK(addr_string.compare(0, 2, Params().Bech32HRP(CChainParams::SAPLING_PAYMENT_ADDRESS)) == 0);
+            BOOST_CHECK(addr_string.compare(0, 15, Params().Bech32HRP(CChainParams::SAPLING_PAYMENT_ADDRESS)) == 0);
 
             auto paymentaddr2 = DecodePaymentAddress(addr_string);
             BOOST_CHECK(IsValidPaymentAddress(paymentaddr2));