diff --git a/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp b/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
index d689260076e..0456573b961 100644
--- a/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
+++ b/tests/auto/widgets/widgets/qdockwidget/tst_qdockwidget.cpp
@@ -1140,13 +1140,17 @@ void tst_QDockWidget::createTestWidgets(QMainWindow* &mainWindow, QPointer<QWidg
     mainWindow->setDockOptions(QMainWindow::AllowTabbedDocks | QMainWindow::GroupedDragging);
     mainWindow->move(m_topLeft);
 
+    const int minWidth = QApplication::style()->pixelMetric(QStyle::PM_TitleBarHeight);
+    const QSize minSize(minWidth, 2 * minWidth);
     d1 = new QDockWidget(mainWindow);
+    d1->setMinimumSize(minSize);
     d1->setWindowTitle("I am D1");
     d1->setObjectName("D1");
     d1->setFeatures(QDockWidget::DockWidgetFeatureMask);
     d1->setAllowedAreas(Qt::DockWidgetArea::AllDockWidgetAreas);
 
     d2 = new QDockWidget(mainWindow);
+    d2->setMinimumSize(minSize);
     d2->setWindowTitle("I am D2");
     d2->setObjectName("D2");
     d2->setFeatures(QDockWidget::DockWidgetFeatureMask);