diff --git a/services/surfaceflinger/LayerBE.h b/services/surfaceflinger/LayerBE.h
index f5150a7..bc482fc 100644
--- a/services/surfaceflinger/LayerBE.h
+++ b/services/surfaceflinger/LayerBE.h
@@ -87,6 +87,9 @@
     friend class ColorLayer;
     friend class SurfaceFlinger;
 
+    // For unit tests
+    friend class TestableSurfaceFlinger;
+
     LayerBE(Layer* layer, std::string layerName);
     explicit LayerBE(const LayerBE& layer);