diff --git a/include/app_task.h b/include/app_task.h
index 564c878..53e4eb8 100644
--- a/include/app_task.h
+++ b/include/app_task.h
@@ -30,4 +30,5 @@ private:
     bool last_switch_state[NUM_PADS];
     
     void process_switch_event(uint8_t switch_id, bool pressed);
+    void run_layout_test();
 };