Currently it fails with:

tests-1             | + /usr/share/tuleap/src/tuleap-cfg/tuleap-cfg.php setup:mysql-init --skip-sanity-check --host=proxysql-mysql80 --admin-user=root --admin-password=welcome0 --db-name=tuleap --app-user=tuleapadm --app-password=welcome0 --tuleap-fqdn=localhost.localdomain --site-admin-password=welcome0
proxysql-mysql80-1  | 2026-03-27 07:50:55 mysql_connection.cpp:1260:handler(): [ERROR] Failed to mysql_real_connect() on 0:mysql84:3306 , FD (Conn:0 , MyDS:0) , 2005: Unknown server host 'mysql84' (-3).
proxysql-mysql80-1  | 2026-03-27 07:50:57 mysql_connection.cpp:1260:handler(): [ERROR] Failed to mysql_real_connect() on 0:mysql84:3306 , FD (Conn:0 , MyDS:0) , 2005: Unknown server host 'mysql84' (-3).
proxysql-mysql80-1  | 2026-03-27 07:50:59 mysql_connection.cpp:1260:handler(): [ERROR] Failed to mysql_real_connect() on 0:mysql84:3306 , FD (Conn:0 , MyDS:0) , 2005: Unknown server host 'mysql84' (-3).
proxysql-mysql80-1  | 2026-03-27 07:51:01 mysql_connection.cpp:1260:handler(): [ERROR] Failed to mysql_real_connect() on 0:mysql84:3306 , FD (Conn:0 , MyDS:0) , 2005: Unknown server host 'mysql84' (-3).
proxysql-mysql80-1  | 2026-03-27 07:51:03 mysql_connection.cpp:1260:handler(): [ERROR] Failed to mysql_real_connect() on 0:mysql84:3306 , FD (Conn:0 , MyDS:0) , 2005: Unknown server host 'mysql84' (-3).
proxysql-mysql80-1  | 2026-03-27 07:51:03 MySQL_Session.cpp:2884:handler_again___status_CONNECTING_SERVER(): [ERROR] Max connect timeout reached while reaching hostgroup 0 after 10554ms . HG status: [{"Bytes_recv":"0","Bytes_sent":"0","ConnERR":"10","ConnFree":"0","ConnOK":"0","ConnUsed":"0","Latency_us":"0","MaxConnUsed":"1","Queries":"0","Queries_GTID_sync":"0","hostgroup":"0","srv_host":"mysql84","srv_port":"3306","status":"ONLINE"}]