diff --git a/src/testlib/qtestcrashhandler_p.h b/src/testlib/qtestcrashhandler_p.h
index 29e80203288..d11ea964b58 100644
--- a/src/testlib/qtestcrashhandler_p.h
+++ b/src/testlib/qtestcrashhandler_p.h
@@ -30,7 +30,6 @@
 
 #ifdef Q_OS_WIN
 #include <iostream>
-#include <qt_windows.h> // for Sleep
 #endif
 
 QT_BEGIN_NAMESPACE
@@ -88,9 +87,6 @@ namespace CrashHandler {
     {
     public:
         WindowsFaultHandler();
-
-    private:
-        static LONG WINAPI windowsFaultHandler(struct _EXCEPTION_POINTERS *exInfo);
     };
     using FatalSignalHandler = WindowsFaultHandler;
 #elif defined(Q_OS_UNIX) && !defined(Q_OS_WASM)
diff --git a/src/testlib/qtestcrashhandler_win.cpp b/src/testlib/qtestcrashhandler_win.cpp
index 8afb45e7b02..f814a6bc68e 100644
--- a/src/testlib/qtestcrashhandler_win.cpp
+++ b/src/testlib/qtestcrashhandler_win.cpp
@@ -16,6 +16,7 @@
 #if !defined(Q_CC_MINGW) || (defined(Q_CC_MINGW) && defined(__MINGW64_VERSION_MAJOR))
 #  include <crtdbg.h>
 #endif
+#include <qt_windows.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -168,6 +169,8 @@ DebugSymbolResolver::Symbol DebugSymbolResolver::resolveSymbol(DWORD64 address)
 }
 } // unnamed namespace
 
+static LONG WINAPI windowsFaultHandler(struct _EXCEPTION_POINTERS *exInfo);
+
 WindowsFaultHandler::WindowsFaultHandler()
 {
 #  if !defined(Q_CC_MINGW)
@@ -177,7 +180,7 @@ WindowsFaultHandler::WindowsFaultHandler()
     SetUnhandledExceptionFilter(windowsFaultHandler);
 }
 
-LONG WINAPI WindowsFaultHandler::windowsFaultHandler(struct _EXCEPTION_POINTERS *exInfo)
+static LONG WINAPI windowsFaultHandler(struct _EXCEPTION_POINTERS *exInfo)
 {
     enum { maxStackFrames = 100 };
     char appName[MAX_PATH];