diff --git a/testsite/group_vars/mail.yml b/testsite/group_vars/mail.yml
index 6fcc6c66736286eba7dfe84ebcd9f4d7a97ce909..864bedb44a7553f9d62d1dd37c0ed350f49bf136 100644
--- a/testsite/group_vars/mail.yml
+++ b/testsite/group_vars/mail.yml
@@ -10,10 +10,10 @@ mail_user: vmail
 mail_user_uid: 5000
 mail_user_gid: 5000
 
-imap_tls_certificate: "{{ inventory_dir }}/tls/mail.{{ testsite_domain }}_imap.pem"
-imap_tls_key: "{{ inventory_dir }}/tls/mail.{{ testsite_domain }}_imap.key"
-smtp_tls_certificate: "{{ inventory_dir }}/tls/mail.{{ testsite_domain }}_smtp.pem"
-smtp_tls_key: "{{ inventory_dir }}/tls/mail.{{ testsite_domain }}_smtp.key"
+imap_tls_certificate: "{{ lookup('file', inventory_dir + '/tls/mail.' + testsite_domain + '_imap.pem') }}"
+imap_tls_key: "{{ lookup('file', inventory_dir + '/tls/mail.' + testsite_domain + '_imap.key') }}"
+smtp_tls_certificate: "{{ lookup('file', inventory_dir + '/tls/mail.' + testsite_domain + '_smtp.pem') }}"
+smtp_tls_key: "{{ lookup('file', inventory_dir + '/tls/mail.' + testsite_domain + '_smtp.key') }}"
 imap_folder_separator: /
 smtp_rbl:
   - bl.spamcop.net