diff --git a/testsite/group_vars/mail.yml b/testsite/group_vars/mail.yml
index e4e48d6cdd642aabd6f51fe26337db4cc01f3595..6f1dacffbcbb1e0e9cd45bfc82ee6cc1e61f1dde 100644
--- a/testsite/group_vars/mail.yml
+++ b/testsite/group_vars/mail.yml
@@ -22,9 +22,9 @@ mail_user_uid: 5000
 mail_user_gid: 5000
 
 imap_tls_certificate: /etc/ssl/certs/mail.example.com_imap.pem
-imap_tls_key: /etc/ssl/private/mail.example.com_imap.key
+imap_tls_key: /etc/ssl/private/mail.example.com_imap.pem
 smtp_tls_certificate: /etc/ssl/certs/mail.example.com_smtp.pem
-smtp_tls_key: /etc/ssl/private/mail.example.com_smtp.key
+smtp_tls_key: /etc/ssl/private/mail.example.com_smtp.pem
 imap_folder_separator: /
 smtp_rbl:
   - bl.spamcop.net