diff --git a/tests/test_ca-certs.sh b/tests/test_ca-certs.sh
index d064d21..b5849cd 100644
--- a/tests/test_ca-certs.sh
+++ b/tests/test_ca-certs.sh
@@ -48,7 +48,9 @@ for host in \
   mail.cwo.com					\
   mail.protonmail.ch				\
   spool.mail.gandi.net				\
-  fb.mail.gandi.net
+  fb.mail.gandi.net				\
+  mx-tnl.mail.saunalahti.fi			\
+  mx-stp.mail.saunalahti.fi
 do
   echo "[*] Testing SMTP STARTTLS for \`${host}'"
   openssl s_client -connect "${host}":25 -starttls smtp -verify_return_error -CAfile "${ca_file}" -showcerts 0</dev/null || exit 1