diff --git a/tests/benchmarks/widgets/kernel/qwidget/tst_qwidget.cpp b/tests/benchmarks/widgets/kernel/qwidget/tst_qwidget.cpp
index 7e24d23c96e..0e2aa4fde2d 100644
--- a/tests/benchmarks/widgets/kernel/qwidget/tst_qwidget.cpp
+++ b/tests/benchmarks/widgets/kernel/qwidget/tst_qwidget.cpp
@@ -49,7 +49,7 @@ public:
     void setOpaqueChildren(bool enable)
     {
         if (opaqueChildren != enable) {
-            foreach (QWidget *w, children)
+            for (QWidget *w : std::as_const(children))
                 w->setAttribute(Qt::WA_OpaquePaintEvent, enable);
             opaqueChildren = enable;
             processEvents();