diff --git a/data/hooks/conf_regen/34-mysql b/data/hooks/conf_regen/34-mysql
index 6c9694796..fd09d5188 100755
--- a/data/hooks/conf_regen/34-mysql
+++ b/data/hooks/conf_regen/34-mysql
@@ -37,7 +37,7 @@ do_post_regen() {
       # This is a trick to check if we're able to use mysql without password
       # Expect instances installed in stretch to already have unix_socket
       #configured, but not old instances from the jessie/wheezy era
-      if ! echo "" | mysql
+      if ! echo "" | mysql 2>/dev/null
       then
           password="$(cat /etc/yunohost/mysql)"
           # Enable plugin unix_socket for root on localhost
@@ -45,7 +45,7 @@ do_post_regen() {
       fi
 
       # If now we're able to login without password, drop the mysql password
-      if echo "" | mysql
+      if echo "" | mysql 2>/dev/null
       then
           rm /etc/yunohost/mysql
       else