diff --git a/roles/mail_server/molecule/default/group_vars/parameters-mandatory.yml b/roles/mail_server/molecule/default/group_vars/parameters-mandatory.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b30c3385ee206b75a0ff6a07178a589a2d799273
--- /dev/null
+++ b/roles/mail_server/molecule/default/group_vars/parameters-mandatory.yml
@@ -0,0 +1,14 @@
+---
+
+mail_ldap_base_dn: dc=local
+mail_ldap_url: ldap://ldap-server/
+mail_ldap_postfix_password: postfixpassword
+mail_ldap_dovecot_password: dovecotpassword
+
+# Common parameters (general, not role).
+tls_certificate_dir: tests/data/x509/
+tls_private_key_dir: tests/data/x509/
+
+# common
+ca_certificates:
+  testca: "{{ lookup('file', 'tests/data/x509/ca.cert.pem') }}"