diff --git a/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp b/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
index 1d78178977..dc82d8b833 100644
--- a/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
+++ b/tests/auto/gui/kernel/qwindow/tst_foreignwindow.cpp
@@ -7,114 +7,7 @@
 #include <private/qguiapplication_p.h>
 #include <qpa/qplatformintegration.h>
 
-#if defined(Q_OS_MACOS)
-#  include <AppKit/AppKit.h>
-#elif defined(Q_OS_WIN)
-#  include <winuser.h>
-#endif
-
-Q_LOGGING_CATEGORY(lcTests, "qt.gui.tests")
-
-class NativeWindow
-{
-    Q_DISABLE_COPY(NativeWindow)
-public:
-    NativeWindow();
-    ~NativeWindow();
-
-    operator WId() const { return reinterpret_cast<WId>(m_handle); }
-
-    void setGeometry(const QRect &rect);
-    QRect geometry() const;
-
-private:
-#if defined(Q_OS_MACOS)
-    NSView *m_handle = nullptr;
-#elif defined(Q_OS_WIN)
-    HWND m_handle = nullptr;
-#endif
-};
-
-#if defined(Q_OS_MACOS)
-
-@interface View : NSView
-@end
-
-@implementation View
-- (instancetype)init
-{
-    if ((self = [super init])) {
-        qCDebug(lcTests) << "Initialized" << self;
-    }
-    return self;
-}
-
-- (void)dealloc
-{
-    qCDebug(lcTests) << "Deallocating" << self;
-    [super dealloc];
-}
-@end
-
-NativeWindow::NativeWindow()
-    : m_handle([View new])
-{
-}
-
-NativeWindow::~NativeWindow()
-{
-    [m_handle release];
-}
-
-void NativeWindow::setGeometry(const QRect &rect)
-{
-    m_handle.frame = QRectF(rect).toCGRect();
-}
-
-QRect NativeWindow::geometry() const
-{
-    return QRectF::fromCGRect(m_handle.frame).toRect();
-}
-
-#elif defined(Q_OS_WIN)
-
-NativeWindow::NativeWindow()
-{
-    static const LPCWSTR className = []{
-        WNDCLASS wc = {};
-        wc.lpfnWndProc = DefWindowProc;
-        wc.hInstance = GetModuleHandle(nullptr);
-        wc.lpszClassName = L"Native Window";
-        RegisterClass(&wc);
-        return wc.lpszClassName;
-    }();
-    m_handle = CreateWindowEx(0, className, nullptr, WS_POPUP,
-                CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
-                nullptr, nullptr, GetModuleHandle(nullptr), nullptr);
-}
-
-NativeWindow::~NativeWindow()
-{
-    DestroyWindow(m_handle);
-}
-
-void NativeWindow::setGeometry(const QRect &rect)
-{
-    MoveWindow(m_handle, rect.x(), rect.y(), rect.width(), rect.height(), false);
-}
-
-QRect NativeWindow::geometry() const
-{
-    WINDOWPLACEMENT wp;
-    wp.length = sizeof(WINDOWPLACEMENT);
-    if (GetWindowPlacement(m_handle, &wp)) {
-        RECT r = wp.rcNormalPosition;
-        return QRect(r.left, r.top, r.right - r.left, r.bottom - r.top);
-    }
-    return {};
-}
-
-#endif
+#include "../../../../shared/nativewindow.h"
 
 class tst_ForeignWindow: public QObject
 {
diff --git a/tests/shared/nativewindow.h b/tests/shared/nativewindow.h
new file mode 100644
index 0000000000..6b3ffe0897
--- /dev/null
+++ b/tests/shared/nativewindow.h
@@ -0,0 +1,112 @@
+// Copyright (C) 2023 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
+
+#ifndef NATIVEWINDOW_H
+#define NATIVEWINDOW_H
+
+#if defined(Q_OS_MACOS)
+#  include <AppKit/AppKit.h>
+#elif defined(Q_OS_WIN)
+#  include <winuser.h>
+#endif
+
+class NativeWindow
+{
+    Q_DISABLE_COPY(NativeWindow)
+public:
+    NativeWindow();
+    ~NativeWindow();
+
+    operator WId() const { return reinterpret_cast<WId>(m_handle); }
+
+    void setGeometry(const QRect &rect);
+    QRect geometry() const;
+
+private:
+#if defined(Q_OS_MACOS)
+    NSView *m_handle = nullptr;
+#elif defined(Q_OS_WIN)
+    HWND m_handle = nullptr;
+#endif
+};
+
+#if defined(Q_OS_MACOS)
+
+@interface View : NSView
+@end
+
+@implementation View
+- (instancetype)init
+{
+    if ((self = [super init])) {
+    }
+    return self;
+}
+
+- (void)dealloc
+{
+    [super dealloc];
+}
+@end
+
+NativeWindow::NativeWindow()
+    : m_handle([View new])
+{
+}
+
+NativeWindow::~NativeWindow()
+{
+    [m_handle release];
+}
+
+void NativeWindow::setGeometry(const QRect &rect)
+{
+    m_handle.frame = QRectF(rect).toCGRect();
+}
+
+QRect NativeWindow::geometry() const
+{
+    return QRectF::fromCGRect(m_handle.frame).toRect();
+}
+
+#elif defined(Q_OS_WIN)
+
+NativeWindow::NativeWindow()
+{
+    static const LPCWSTR className = []{
+        WNDCLASS wc = {};
+        wc.lpfnWndProc = DefWindowProc;
+        wc.hInstance = GetModuleHandle(nullptr);
+        wc.lpszClassName = L"Native Window";
+        RegisterClass(&wc);
+        return wc.lpszClassName;
+    }();
+    m_handle = CreateWindowEx(0, className, nullptr, WS_POPUP,
+                CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
+                nullptr, nullptr, GetModuleHandle(nullptr), nullptr);
+}
+
+NativeWindow::~NativeWindow()
+{
+    DestroyWindow(m_handle);
+}
+
+void NativeWindow::setGeometry(const QRect &rect)
+{
+    MoveWindow(m_handle, rect.x(), rect.y(), rect.width(), rect.height(), false);
+}
+
+QRect NativeWindow::geometry() const
+{
+    WINDOWPLACEMENT wp;
+    wp.length = sizeof(WINDOWPLACEMENT);
+    if (GetWindowPlacement(m_handle, &wp)) {
+        RECT r = wp.rcNormalPosition;
+        return QRect(r.left, r.top, r.right - r.left, r.bottom - r.top);
+    }
+    return {};
+}
+
+#endif
+
+#endif // NATIVEWINDOW_H