diff --git a/Makefile b/Makefile
index efe203b784e7ea0d83af951dad81a29212d2018f..3888fe55efeb6ee3941cb57c904dbd9bf717d913 100644
--- a/Makefile
+++ b/Makefile
@@ -40,7 +40,10 @@ ifeq ($(RELEASE),yes)
 DUNE_BUILD_OPTS+=--release
 endif
 
-DUNE_DISPLAY?=progress # Dune default, see '--display' dune option
+# DUNE_DISPLAY: chose Dune build verbosity (see '--display' dune option)
+# Default: progress (same as dune default)
+# Recommend for tests: short
+DUNE_DISPLAY?=progress
 DUNE_BUILD_OPTS+=--display $(DUNE_DISPLAY)
 
 ###################