diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 8f10faf62f..a9f823af8e 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -436,7 +436,7 @@ jobs:
             env: 'x86_64'
             ver: '9.5.0'
             url: 'https://github.com/brechtsanders/winlibs_mingw/releases/download/9.5.0-10.0.0-msvcrt-r1/winlibs-x86_64-posix-seh-gcc-9.5.0-mingw-w64msvcrt-10.0.0-r1.7z'
-            config: '-DENABLE_DEBUG=ON -DBUILD_SHARED_LIBS=OFF -DCURL_USE_SCHANNEL=ON -DENABLE_UNICODE=OFF'
+            config: '-DENABLE_DEBUG=ON -DBUILD_SHARED_LIBS=OFF -DCURL_USE_SCHANNEL=ON -DENABLE_UNICODE=OFF -DCURL_DISABLE_VERBOSE_STRINGS=ON'
             type: 'Release'
             tflags: 'skiprun'
           - name: 'schannel mbedtls U'  # mingw-w64 6.0
diff --git a/appveyor.sh b/appveyor.sh
index a5af2ef308..732d803d35 100644
--- a/appveyor.sh
+++ b/appveyor.sh
@@ -89,6 +89,7 @@ if [ "${BUILD_SYSTEM}" = 'CMake' ]; then
       -DCURL_USE_SCHANNEL="${SCHANNEL}" \
       -DCURL_USE_OPENSSL="${OPENSSL}" \
       -DCURL_USE_LIBPSL=OFF \
+      ${CMAKE_OPTIONS:-} \
       ${options} \
       || { cat "${root}"/_bld/CMakeFiles/CMake* 2>/dev/null; false; }
     [ "${APPVEYOR_BUILD_WORKER_IMAGE}" = 'Visual Studio 2013' ] && cd ..
diff --git a/appveyor.yml b/appveyor.yml
index a0e21b2e1e..79eb9094b8 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -41,6 +41,7 @@ environment:
   HTTP_ONLY: 'OFF'
   TFLAGS: 'skiprun'
   EXAMPLES: 'OFF'
+  CMAKE_OPTIONS: ''
 
   matrix:
 
@@ -53,7 +54,7 @@ environment:
       PRJ_CFG: Release
       OPENSSL: 'ON'
       SHARED: 'ON'
-    - job_name: 'CM VS2022, Release, arm64, Schannel, Static, no-DEBUGBUILD, Build-tests'
+    - job_name: 'CM VS2022, Release, arm64, Schannel, Static, !DEBUGBUILD, Build-tests'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
       PRJ_GEN: 'Visual Studio 17 2022'
       TARGET: '-A ARM64'
@@ -101,7 +102,7 @@ environment:
       SCHANNEL: 'ON'
       SHARED: 'ON'
       TFLAGS: 'skipall'
-    - job_name: 'CM VS2019, Debug, x64, OpenSSL 3.0 + Schannel, Shared, Build-tests'
+    - job_name: 'CM VS2019, Debug, x64, OpenSSL 3.0 + Schannel, Shared, !verbose, Build-tests'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2019'
       PRJ_GEN: 'Visual Studio 16 2019'
       TARGET: '-A x64'
@@ -109,6 +110,7 @@ environment:
       OPENSSL: 'ON'
       SCHANNEL: 'ON'
       SHARED: 'ON'
+      CMAKE_OPTIONS: '-DCURL_DISABLE_VERBOSE_STRINGS=ON'
     - job_name: 'CM VS2022, Debug, x64, OpenSSL 3.5 + Schannel, Static, Unicode, Build-tests & examples, clang-cl'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
       PRJ_GEN: 'Visual Studio 17 2022'
@@ -119,7 +121,7 @@ environment:
       ENABLE_UNICODE: 'ON'
       EXAMPLES: 'ON'
       TOOLSET: 'ClangCl'
-    - job_name: 'CM VS2022, Release, x64, Schannel, Shared, Unicode, no-DEBUGBUILD, Build-tests'
+    - job_name: 'CM VS2022, Release, x64, Schannel, Shared, Unicode, !DEBUGBUILD, Build-tests'
       APPVEYOR_BUILD_WORKER_IMAGE: 'Visual Studio 2022'
       PRJ_GEN: 'Visual Studio 17 2022'
       TARGET: '-A x64'
diff --git a/lib/mqtt.c b/lib/mqtt.c
index f5c8353a9f..cabafa3383 100644
--- a/lib/mqtt.c
+++ b/lib/mqtt.c
@@ -614,7 +614,7 @@ static int mqtt_decode_len(size_t *lenp, unsigned char *buf, size_t buflen)
   return 0;
 }
 
-#ifdef DEBUGBUILD
+#if defined(DEBUGBUILD) && defined(CURLVERBOSE)
 static const char *statenames[] = {
   "MQTT_FIRST",
   "MQTT_REMAINING_LENGTH",
diff --git a/lib/multi.c b/lib/multi.c
index 84956e182d..b847f81a7a 100644
--- a/lib/multi.c
+++ b/lib/multi.c
@@ -160,6 +160,7 @@ static void mstate(struct Curl_easy *data, CURLMstate state
     return;
 
 #ifdef DEBUGBUILD
+  NOVERBOSE((void)lineno);
   CURL_TRC_M(data, "-> [%s] (line %d)", CURL_MSTATE_NAME(state), lineno);
 #else
   CURL_TRC_M(data, "-> [%s]", CURL_MSTATE_NAME(state));
diff --git a/lib/vtls/schannel.c b/lib/vtls/schannel.c
index 027d28e045..fd268c92a3 100644
--- a/lib/vtls/schannel.c
+++ b/lib/vtls/schannel.c
@@ -2259,7 +2259,7 @@ static CURLcode schannel_recv(struct Curl_cfilter *cf, struct Curl_easy *data,
       goto cleanup;
     }
     else {
-      VERBOSE(char buffer[STRERROR_LEN]);
+      char buffer[STRERROR_LEN];
       failf(data, "schannel: failed to read data from server: %s",
             Curl_sspi_strerror(sspi_status, buffer, sizeof(buffer)));
       result = CURLE_RECV_ERROR;