diff --git a/coverage/fuel3.html b/coverage/fuel3.html
index 9e6009f..97f18ab 100644
--- a/coverage/fuel3.html
+++ b/coverage/fuel3.html
@@ -100,9 +100,11 @@
         title: "OpenStreetMap",
         visible: true
     });
+    /*
     grayOsmLayer.on('postcompose', function(event) {
         grayscale(event.context);
     });
+    */
 
     const fuel0 = new ol.layer.VectorTile({
         source: new ol.source.VectorTile({