diff --git a/Makefile b/Makefile
index 375c3612..8327ae58 100644
--- a/Makefile
+++ b/Makefile
@@ -36,6 +36,7 @@ minify:
 
 test:
 	@echo to be implemented
+	@echo Open test/index.html instead
 
 documentation:
 	@jsdoc src -r -d doc