diff --git a/src/test/prevector_tests.cpp b/src/test/prevector_tests.cpp
index db9162c0d..01c3a6ced 100644
--- a/src/test/prevector_tests.cpp
+++ b/src/test/prevector_tests.cpp
@@ -206,7 +206,7 @@ BOOST_AUTO_TEST_CASE(PrevectorTestInt)
                 test.erase(InsecureRandRange(test.size()));
             }
             if (InsecureRandBits(3) == 2) {
-                int new_size = std::max<int>(0, std::min<int>(30, test.size() + (InsecureRandRange(5)) - 2));
+                int new_size = std::max(0, std::min(30, (int)test.size() + (int)InsecureRandRange(5) - 2));
                 test.resize(new_size);
             }
             if (InsecureRandBits(3) == 3) {
diff --git a/src/test/scheduler_tests.cpp b/src/test/scheduler_tests.cpp
index 760f933ab..179df7dd3 100644
--- a/src/test/scheduler_tests.cpp
+++ b/src/test/scheduler_tests.cpp
@@ -56,8 +56,8 @@ BOOST_AUTO_TEST_CASE(manythreads)
     int counter[10] = { 0 };
     FastRandomContext rng(42);
     auto zeroToNine = [](FastRandomContext& rc) -> int { return rc.randrange(10); }; // [0, 9]
-    auto randomMsec = [](FastRandomContext& rc) -> int { return -11 + rc.randrange(1012); }; // [-11, 1000]
-    auto randomDelta = [](FastRandomContext& rc) -> int { return -1000 + rc.randrange(2001); }; // [-1000, 1000]
+    auto randomMsec = [](FastRandomContext& rc) -> int { return -11 + (int)rc.randrange(1012); }; // [-11, 1000]
+    auto randomDelta = [](FastRandomContext& rc) -> int { return -1000 + (int)rc.randrange(2001); }; // [-1000, 1000]
 
     boost::chrono::system_clock::time_point start = boost::chrono::system_clock::now();
     boost::chrono::system_clock::time_point now = start;
diff --git a/src/wallet/test/accounting_tests.cpp b/src/wallet/test/accounting_tests.cpp
index cafd69d07..e6510cc21 100644
--- a/src/wallet/test/accounting_tests.cpp
+++ b/src/wallet/test/accounting_tests.cpp
@@ -82,7 +82,7 @@ BOOST_AUTO_TEST_CASE(acc_orderupgrade)
     wtx.mapValue["comment"] = "y";
     {
         CMutableTransaction tx(*wtx.tx);
-        --tx.nLockTime;  // Just to change the hash :)
+        ++tx.nLockTime;  // Just to change the hash :)
         wtx.SetTx(MakeTransactionRef(std::move(tx)));
     }
     pwalletMain->AddToWallet(wtx);
@@ -92,7 +92,7 @@ BOOST_AUTO_TEST_CASE(acc_orderupgrade)
     wtx.mapValue["comment"] = "x";
     {
         CMutableTransaction tx(*wtx.tx);
-        --tx.nLockTime;  // Just to change the hash :)
+        ++tx.nLockTime;  // Just to change the hash :)
         wtx.SetTx(MakeTransactionRef(std::move(tx)));
     }
     pwalletMain->AddToWallet(wtx);