diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -228,10 +228,14 @@
 	-Wunreachable-code-loop-increment
 	-Wsign-compare
 	-Wconditional-uninitialized
+	-Wduplicated-branches
+	-Wduplicated-cond
+	-Wlogical-op
 )
 add_compiler_flag_group(-Wformat -Wformat-security)
 add_cxx_compiler_flags(
 	-Wredundant-move
+	-Woverloaded-virtual
 )
 
 if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
diff --git a/src/secp256k1/CMakeLists.txt b/src/secp256k1/CMakeLists.txt
--- a/src/secp256k1/CMakeLists.txt
+++ b/src/secp256k1/CMakeLists.txt
@@ -52,6 +52,7 @@
 	-Wnested-externs
 	-Wstrict-prototypes
 	-Wno-long-long
+	-Wno-duplicated-branches
 )
 
 # Default visibility is hidden on all targets.
diff --git a/src/test/rpc_server_tests.cpp b/src/test/rpc_server_tests.cpp
--- a/src/test/rpc_server_tests.cpp
+++ b/src/test/rpc_server_tests.cpp
@@ -24,6 +24,9 @@
     explicit ArgsTestRPCCommand(const std::string &nameIn)
         : RPCCommandWithArgsContext(nameIn) {}
 
+    // Suppress a [-Werror=overloaded-virtual] warning
+    using RPCCommandWithArgsContext::Execute;
+
     UniValue Execute(const UniValue &args) const override {
         BOOST_CHECK_EQUAL(args["arg1"].get_str(), "value1");
         return UniValue("testing1");