diff --git a/unittests/abi_tests.cpp b/unittests/abi_tests.cpp
index 5cabcfc2ac..8c24d92bed 100644
--- a/unittests/abi_tests.cpp
+++ b/unittests/abi_tests.cpp
@@ -2055,7 +2055,8 @@ BOOST_AUTO_TEST_CASE(abi_account_name_in_eosio_abi)
    )=====";
 
    auto abi = eosio_contract_abi(fc::json::from_string(repeat_abi).as<abi_def>());
-   auto is_type_exception = [](fc::assert_exception const & e) -> bool { return e.to_detail_string().find("abi.types.size") != std::string::npos; };
+   auto is_type_exception = [](fc::assert_exception const & e) -> bool { return e.to_detail_string().find("type already exists") != std::string::npos; };
+   BOOST_CHECK_EXCEPTION( abi_serializer abis(abi, abi_serializer::create_yield_function(max_serialization_time )), duplicate_abi_type_def_exception, is_type_exception );
 
 } FC_LOG_AND_RETHROW() }
 
diff --git a/unittests/auth_tests.cpp b/unittests/auth_tests.cpp
index f6fa7658a4..d6572f3094 100644
--- a/unittests/auth_tests.cpp
+++ b/unittests/auth_tests.cpp
@@ -341,7 +341,6 @@ BOOST_AUTO_TEST_CASE( any_auth ) { try {
 
    const auto spending_priv_key = chain.get_private_key(name("alice"), "spending");
    const auto spending_pub_key = spending_priv_key.get_public_key();
-   const auto bob_spending_priv_key = chain.get_private_key(name("bob"), "spending");
    const auto bob_spending_pub_key = spending_priv_key.get_public_key();
 
    chain.set_authority(name("alice"), name("spending"), spending_pub_key, name("active"));
diff --git a/unittests/bootseq_tests.cpp b/unittests/bootseq_tests.cpp
index 3ae069c030..efc1487c23 100644
--- a/unittests/bootseq_tests.cpp
+++ b/unittests/bootseq_tests.cpp
@@ -325,7 +325,6 @@ BOOST_FIXTURE_TEST_CASE( bootseq_test, bootseq_tester ) {
         claim_rewards("runnerup1"_n);
         BOOST_TEST(get_balance("runnerup1"_n).get_amount() > 0);
 
-        const auto first_june_2018 = fc::seconds(1527811200); // 2018-06-01
         const auto first_june_2028 = fc::seconds(1843430400); // 2028-06-01
         // Ensure that now is yet 10 years after 2018-06-01 yet
         BOOST_REQUIRE(control->head_block_time().time_since_epoch() < first_june_2028);
diff --git a/unittests/whitelist_blacklist_tests.cpp b/unittests/whitelist_blacklist_tests.cpp
index f50c23ab5c..af93826299 100644
--- a/unittests/whitelist_blacklist_tests.cpp
+++ b/unittests/whitelist_blacklist_tests.cpp
@@ -754,7 +754,7 @@ BOOST_AUTO_TEST_CASE( greylist_limit_tests ) { try {
       ("cpu_weight", 249'999'999)
    );
 
-   const uint64_t reqauth_net_charge = 104;
+   const int64_t reqauth_net_charge = 104;
    auto push_reqauth = [&]( name acnt, name perm, uint32_t billed_cpu_time_us ) {
       signed_transaction trx;
       trx.actions.emplace_back( c.get_action( config::system_account_name, "reqauth"_n,