diff --git a/src/corelib/global/qtversionchecks.h b/src/corelib/global/qtversionchecks.h
index 7b5d99af869..14df2780d85 100644
--- a/src/corelib/global/qtversionchecks.h
+++ b/src/corelib/global/qtversionchecks.h
@@ -72,4 +72,43 @@
 # define QT6_CALL_NEW_OVERLOAD_TAIL QT6_ONLY(, QT6_CALL_NEW_OVERLOAD)
 #endif
 
+/*
+    Macro to tag Tech Preview APIs.
+    It expands to nothing, because we want to use it in places where
+    nothing is generally allowed (not even an attribute); for instance:
+    to tag other macros, Q_PROPERTY declarations, and so on.
+
+    Still: use it as if it were an C++ attribute.
+
+    To mark a class as TP:
+        class QT_TECH_PREVIEW_API Q_CORE_EXPORT QClass { ... };
+
+    To mark a function:
+        QT_TECH_PREVIEW_API void qFunction();
+
+    To mark an enumeration or enumerator:
+        enum class QT_TECH_PREVIEW_API QEnum {
+            Enum1,
+            Enum2 QT_TECH_PREVIEW_API,
+        };
+
+    To mark parts of a class:
+        class QClass : public QObject
+        {
+            Q_OBJECT
+
+            QT_TECH_PREVIEW_API
+            Q_PROPERTY(int countNG ...)   // this is TP
+
+            Q_PROPERTY(int count ...)     // this is stable API
+
+        public:
+            QT_TECH_PREVIEW_API
+            void f();     // TP
+
+            void g();     // stable
+        };
+*/
+#define QT_TECH_PREVIEW_API
+
 #endif /* QTVERSIONCHECKS_H */
diff --git a/tests/auto/tools/moc/tech-preview.h b/tests/auto/tools/moc/tech-preview.h
new file mode 100644
index 00000000000..8f285048e4e
--- /dev/null
+++ b/tests/auto/tools/moc/tech-preview.h
@@ -0,0 +1,43 @@
+// Copyright (C) 2024 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com>
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#ifndef TECH_PREVIEW_H
+#define TECH_PREVIEW_H
+
+#include <QObject>
+
+class QT_TECH_PREVIEW_API MyTechPreviewObject : public QObject
+{
+    QT_TECH_PREVIEW_API
+    Q_OBJECT
+
+    QT_TECH_PREVIEW_API
+    Q_PROPERTY(int status MEMBER m_status)
+
+    int m_status = 0;
+
+public:
+    void myMethod() {}
+    QT_TECH_PREVIEW_API void myTPMethod() {}
+
+    Q_INVOKABLE QT_TECH_PREVIEW_API void myTPInvokable1() {}
+    QT_TECH_PREVIEW_API Q_INVOKABLE void myTPInvokable2() {}
+
+    enum class QT_TECH_PREVIEW_API MyTechPreviewEnum
+    {
+        A, B, C,
+        TP QT_TECH_PREVIEW_API,
+        X, Y, Z
+    };
+
+signals:
+    void mySignal();
+    QT_TECH_PREVIEW_API void myTPSignal();
+
+public Q_SLOTS:
+    void mySlot() {}
+    QT_TECH_PREVIEW_API void myTPSlot() {}
+};
+
+
+#endif // TECH_PREVIEW_H
diff --git a/tests/auto/tools/moc/tst_moc.cpp b/tests/auto/tools/moc/tst_moc.cpp
index 3fe170a9a70..a671d92dade 100644
--- a/tests/auto/tools/moc/tst_moc.cpp
+++ b/tests/auto/tools/moc/tst_moc.cpp
@@ -62,6 +62,8 @@
 
 #include "qmlmacro.h"
 
+#include "tech-preview.h"
+
 using namespace Qt::StringLiterals;
 
 #ifdef Q_MOC_RUN