diff --git a/src/widgets/widgets/qdockwidget.cpp b/src/widgets/widgets/qdockwidget.cpp
index c952c8d4fdc..5b9704228b5 100644
--- a/src/widgets/widgets/qdockwidget.cpp
+++ b/src/widgets/widgets/qdockwidget.cpp
@@ -1186,10 +1186,10 @@ void QDockWidgetPrivate::setWindowState(bool floating, bool unplug, const QRect
             return; // this dockwidget can't be redocked
     }
 
-    bool wasFloating = q->isFloating();
+    const bool wasFloating = q->isFloating();
     if (wasFloating) // Prevent repetitive unplugging from nested invocations (QTBUG-42818)
         unplug = false;
-    bool hidden = q->isHidden();
+    const bool hidden = q->isHidden();
 
     if (q->isVisible())
         q->hide();
@@ -1497,8 +1497,14 @@ void QDockWidget::changeEvent(QEvent *event)
     QDockWidgetLayout *layout = qobject_cast<QDockWidgetLayout*>(this->layout());
 
     switch (event->type()) {
-    case QEvent::ModifiedChange:
     case QEvent::WindowTitleChange:
+        if (isFloating() && windowHandle() && d->topData()) {
+            // From QWidget::setWindowTitle(): Propagate window title without signal emission
+            d->topData()->caption = windowHandle()->title();
+            d->setWindowTitle_helper(windowHandle()->title());
+        }
+        Q_FALLTHROUGH();
+    case QEvent::ModifiedChange:
         update(layout->titleArea());
 #ifndef QT_NO_ACTION
         d->fixedWindowTitle = qt_setWindowTitle_helperHelper(windowTitle(), this);
diff --git a/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp b/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
index 35a05f768a8..97878e08876 100644
--- a/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
+++ b/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
@@ -65,7 +65,7 @@ private slots:
     // Dock area permissions for DockWidgets and DockWidgetGroupWindows
     void dockPermissions();
 
-    // test floating tabs and item_tree consistency
+    // test floating tabs, item_tree and window title consistency
     void floatingTabs();
 
     // test hide & show
@@ -1375,7 +1375,10 @@ void tst_QDockWidget::floatingTabs()
 
     /*
      * replug both dock widgets into their initial position
-     * expected behavior: both docks are plugged and no longer floating
+     * expected behavior:
+       - both docks are plugged
+       - both docks are no longer floating
+       - title changes have been propagated
      */
 
 
@@ -1396,6 +1399,12 @@ void tst_QDockWidget::floatingTabs()
     QTRY_VERIFY(d1->isFloating());
     QTRY_VERIFY(!d2->isFloating());
 
+    // Change titles
+    static constexpr QLatin1StringView newD1("New D1");
+    static constexpr QLatin1StringView newD2("New D2");
+    d1->setWindowTitle(newD1);
+    d2->setWindowTitle(newD2);
+
     // Plug back into dock areas
     qCDebug(lcTestDockWidget) << "*** test plugging back to dock areas ***";
     qCDebug(lcTestDockWidget) << "Move d1 to left dock";
@@ -1415,6 +1424,10 @@ void tst_QDockWidget::floatingTabs()
     QTRY_VERIFY(!mainWindow->findChild<QDockWidgetGroupWindow*>());
     QTRY_VERIFY(ftabs.isNull());
 
+    // check window titles
+    QCOMPARE(d1->windowTitle(), newD1);
+    QCOMPARE(d2->windowTitle(), newD2);
+
     // Check if paths are consistent
     qCDebug(lcTestDockWidget) << "Checking path consistency" << layout->layoutState.indexOf(d1) << layout->layoutState.indexOf(d2);