diff --git a/autotests/wayland/lockscreen.cpp b/autotests/wayland/lockscreen.cpp
index 0aeaa7941a..170c27f673 100644
--- a/autotests/wayland/lockscreen.cpp
+++ b/autotests/wayland/lockscreen.cpp
@@ -206,6 +206,7 @@ void LockScreenTest::initTestCase()
     QCOMPARE(screens()->geometry(0), QRect(0, 0, 1280, 1024));
     QCOMPARE(screens()->geometry(1), QRect(1280, 0, 1280, 1024));
     setenv("QT_QPA_PLATFORM", "wayland", true);
+    setenv("QMLSCENE_DEVICE", "softwarecontext", true);
     waylandServer()->initWorkspace();
 }