diff --git a/testsite/group_vars/all.yml b/testsite/group_vars/all.yml
index f07efee641c1354efe591ee4bd668a64624b831a..874b64cc4cc013cb950fe776d58bfa35e3f162f5 100644
--- a/testsite/group_vars/all.yml
+++ b/testsite/group_vars/all.yml
@@ -41,7 +41,7 @@ common_packages:
   - unzip
 
 ca_certificates:
-  "ca.pem": "{{ lookup('file', inventory_dir + '/tls/ca.pem') }}"
+  "ca": "{{ lookup('file', inventory_dir + '/tls/ca.pem') }}"
 
 incoming_connection_limit: 2/second