diff --git a/roles/wsgi_website/molecule/default/playbook.yml b/roles/wsgi_website/molecule/default/playbook.yml
index a4643d6c3efe3352b527bb414402abcc37a6a9f6..f7ca47a388e6789c177af87fb7196ee60a8c7295 100644
--- a/roles/wsgi_website/molecule/default/playbook.yml
+++ b/roles/wsgi_website/molecule/default/playbook.yml
@@ -11,17 +11,17 @@
     default_https_tls_certificate: "{{ lookup('file', 'tests/data/x509/wsgi-website_https.cert.pem') }}"
     default_https_tls_key: "{{ lookup('file', 'tests/data/x509/wsgi-website_https.key.pem') }}"
 
-    # Common parameters (general, not role).
-    tls_certificate_dir: tests/data/x509/
-    tls_private_key_dir: tests/data/x509/
-
   roles:
     - role: wsgi_website
       fqdn: parameters-mandatory
+      https_tls_certificate: "{{ lookup('file', 'tests/data/x509/parameters-mandatory_https.cert.pem') }}"
+      https_tls_key: "{{ lookup('file', 'tests/data/x509/parameters-mandatory_https.key.pem') }}"
       wsgi_application: testapp:application
 
     - role: wsgi_website
       fqdn: parameters-optional.local
+      https_tls_certificate: "{{ lookup('file', 'tests/data/x509/parameters-optional.local_https.cert.pem') }}"
+      https_tls_key: "{{ lookup('file', 'tests/data/x509/parameters-optional.local_https.key.pem') }}"
       additional_nginx_config:
         - comment: Custom missing page.
           value: error_page 404 /my/own/error/page;
@@ -35,8 +35,6 @@
         MY_ENV_VAR: "My environment variable"
       futures_version: 3.1.0
       gunicorn_version: 19.7.0
-      https_tls_certificate: "{{ lookup('file', 'tests/data/x509/parameters-optional.local_https.cert.pem') }}"
-      https_tls_key: "{{ lookup('file', 'tests/data/x509/parameters-optional.local_https.key.pem') }}"
       packages:
         - "libmariadbclient-dev-compat"
         - global