diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7b88987caf1..ed5b657a89b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -130,7 +130,7 @@ if(WITH_USDT)
   find_package(USDT MODULE REQUIRED)
 endif()
 
-cmake_dependent_option(ENABLE_EXTERNAL_SIGNER "Enable external signer support." ON "NOT WIN32" OFF)
+option(ENABLE_EXTERNAL_SIGNER "Enable external signer support." ON)
 
 cmake_dependent_option(WITH_QRENCODE "Enable QR code support." ON "BUILD_GUI" OFF)
 if(WITH_QRENCODE)
diff --git a/ci/test/03_test_script.sh b/ci/test/03_test_script.sh
index a71565ba98e..3394c50b8bd 100755
--- a/ci/test/03_test_script.sh
+++ b/ci/test/03_test_script.sh
@@ -118,7 +118,7 @@ BASE_BUILD_DIR=${BASE_BUILD_DIR:-$BASE_SCRATCH_DIR/build-$HOST}
 mkdir -p "${BASE_BUILD_DIR}"
 cd "${BASE_BUILD_DIR}"
 
-BITCOIN_CONFIG_ALL="$BITCOIN_CONFIG_ALL -DENABLE_EXTERNAL_SIGNER=ON -DCMAKE_INSTALL_PREFIX=$BASE_OUTDIR"
+BITCOIN_CONFIG_ALL="$BITCOIN_CONFIG_ALL -DCMAKE_INSTALL_PREFIX=$BASE_OUTDIR"
 
 if [[ "${RUN_TIDY}" == "true" ]]; then
   BITCOIN_CONFIG_ALL="$BITCOIN_CONFIG_ALL -DCMAKE_EXPORT_COMPILE_COMMANDS=ON"
diff --git a/src/test/system_tests.cpp b/src/test/system_tests.cpp
index a5d9be07d52..dec4d418290 100644
--- a/src/test/system_tests.cpp
+++ b/src/test/system_tests.cpp
@@ -25,7 +25,11 @@ BOOST_AUTO_TEST_CASE(run_command)
         BOOST_CHECK(result.isNull());
     }
     {
+#ifdef WIN32
+        const UniValue result = RunCommandParseJSON("cmd.exe /c echo {\"success\": true}");
+#else
         const UniValue result = RunCommandParseJSON("echo {\"success\": true}");
+#endif
         BOOST_CHECK(result.isObject());
         const UniValue& success = result.find_value("success");
         BOOST_CHECK(!success.isNull());
@@ -33,12 +37,20 @@ BOOST_AUTO_TEST_CASE(run_command)
     }
     {
         // An invalid command is handled by cpp-subprocess
+#ifdef WIN32
+        const std::string expected{"CreateProcess failed: "};
+#else
         const std::string expected{"execve failed: "};
+#endif
         BOOST_CHECK_EXCEPTION(RunCommandParseJSON("invalid_command"), subprocess::CalledProcessError, HasReason(expected));
     }
     {
         // Return non-zero exit code, no output to stderr
+#ifdef WIN32
+        const std::string command{"cmd.exe /c exit 1"};
+#else
         const std::string command{"false"};
+#endif
         BOOST_CHECK_EXCEPTION(RunCommandParseJSON(command), std::runtime_error, [&](const std::runtime_error& e) {
             const std::string what{e.what()};
             BOOST_CHECK(what.find(strprintf("RunCommandParseJSON error: process(%s) returned 1: \n", command)) != std::string::npos);
@@ -47,7 +59,11 @@ BOOST_AUTO_TEST_CASE(run_command)
     }
     {
         // Return non-zero exit code, with error message for stderr
+#ifdef WIN32
+        const std::string command{"cmd.exe /c \"echo err 1>&2 && exit 1\""};
+#else
         const std::string command{"sh -c 'echo err 1>&2 && false'"};
+#endif
         const std::string expected{"err"};
         BOOST_CHECK_EXCEPTION(RunCommandParseJSON(command), std::runtime_error, [&](const std::runtime_error& e) {
             const std::string what(e.what());
@@ -58,17 +74,23 @@ BOOST_AUTO_TEST_CASE(run_command)
     }
     {
         // Unable to parse JSON
+#ifdef WIN32
+        const std::string command{"cmd.exe /c echo {"};
+#else
         const std::string command{"echo {"};
+#endif
         BOOST_CHECK_EXCEPTION(RunCommandParseJSON(command), std::runtime_error, HasReason("Unable to parse JSON: {"));
     }
-    // Test std::in
+#ifndef WIN32
     {
+        // Test stdin
         const UniValue result = RunCommandParseJSON("cat", "{\"success\": true}");
         BOOST_CHECK(result.isObject());
         const UniValue& success = result.find_value("success");
         BOOST_CHECK(!success.isNull());
         BOOST_CHECK_EQUAL(success.get_bool(), true);
     }
+#endif
 }
 #endif // ENABLE_EXTERNAL_SIGNER