diff --git a/tests/auto/wayland/shared/mockcompositor.h b/tests/auto/wayland/shared/mockcompositor.h
index deef1f909e6..485816178f9 100644
--- a/tests/auto/wayland/shared/mockcompositor.h
+++ b/tests/auto/wayland/shared/mockcompositor.h
@@ -91,6 +91,7 @@ int main(int argc, char **argv) \
     setenv("QT_QPA_PLATFORM", "wayland", 1); \
     test tc; \
     QGuiApplication app(argc, argv); \
+    QTEST_SET_MAIN_SOURCE_PATH \
     return QTest::qExec(&tc, argc, argv); \
 } \