diff --git a/autotests/testkwaylandbackend.cpp b/autotests/testkwaylandbackend.cpp
--- a/autotests/testkwaylandbackend.cpp
+++ b/autotests/testkwaylandbackend.cpp
@@ -189,7 +189,8 @@
     GetConfigOperation *op = new GetConfigOperation();
     op->exec();
     m_config = op->config();
-    auto output = m_config->output(1);
+    auto output = m_config->output(3);
+    QVERIFY(output);
     auto n_mode = QStringLiteral("800x600@60");
     auto o_mode = output->currentModeId();
     output->setCurrentModeId(n_mode);