diff --git a/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp b/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
index 836419659b..5eab76898b 100644
--- a/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
+++ b/tests/auto/gui/kernel/qguiapplication/tst_qguiapplication.cpp
@@ -1146,6 +1146,8 @@ void tst_QGuiApplication::genericPluginsAndWindowSystemEvents()
     QVERIFY(QGuiApplication::primaryScreen());
     QCOMPARE(QGuiApplication::primaryScreen()->orientation(), testOrientationToSend);
 
+    if (QGuiApplication::platformName().startsWith(QLatin1String("wayland"), Qt::CaseInsensitive))
+        QEXPECT_FAIL("", "Wayland: This fails. See QTBUG-100891.", Abort);
     QCOMPARE(testReceiver.customEvents, 0);
     QCoreApplication::sendPostedEvents(&testReceiver);
     QCOMPARE(testReceiver.customEvents, 1);