diff --git a/autotests/mock_effectshandler.h b/autotests/mock_effectshandler.h
index d3fcab03b9..55ff4ae4f9 100644
--- a/autotests/mock_effectshandler.h
+++ b/autotests/mock_effectshandler.h
@@ -135,9 +135,11 @@ public:
         return nullptr;
     }
     KWin::EffectWindow *findWindow(QWindow *w) const override {
+        Q_UNUSED(w)
         return nullptr;
     }
     KWin::EffectWindow *findWindow(const QUuid &id) const override {
+        Q_UNUSED(id)
         return nullptr;
     }
     void *getProxy(QString) override {