diff --git a/SRC/test-echoping-idn b/SRC/test-echoping-idn
index 9d1db28..f40c3fb 100644
--- a/SRC/test-echoping-idn
+++ b/SRC/test-echoping-idn
@@ -12,3 +12,4 @@ echo "possible values."
 
 ./echoping -h / -v café.gennic.net
 ./echoping -h / -v www.trườngđạihọcbáchkhoahànội.edu.vn
+./echoping -h / -v www.müller.ch