diff --git a/tests/auto/widgets/widgets/qsizegrip/tst_qsizegrip.cpp b/tests/auto/widgets/widgets/qsizegrip/tst_qsizegrip.cpp
index a543efe44e1..755e39e7dcc 100644
--- a/tests/auto/widgets/widgets/qsizegrip/tst_qsizegrip.cpp
+++ b/tests/auto/widgets/widgets/qsizegrip/tst_qsizegrip.cpp
@@ -85,6 +85,7 @@ void tst_QSizeGrip::hideAndShowOnWindowStateChange()
     else
         widget->show();
     QTRY_VERIFY(sizeGrip->isVisible());
+    QVERIFY(QTest::qWaitForWindowExposed(widget.data()));
 
     widget->showFullScreen();
     QTRY_VERIFY(!sizeGrip->isVisible());