diff --git a/testsite/group_vars/all.yml b/testsite/group_vars/all.yml
index ac10537adf2b5a48cee78d12ab5b7caa804350bc..eeaa0843a3754d56fd1ee72a2f47bab4e5b909c3 100644
--- a/testsite/group_vars/all.yml
+++ b/testsite/group_vars/all.yml
@@ -63,7 +63,7 @@ ldap_client_config:
     value: demand
 
 # Enable and configure backups
-enable_backup: yes
+enable_backup: true
 
 backup_additional_encryption_keys:
   - "{{ lookup('pipe', 'gpg2 --homedir \"' + inventory_dir + '/backup_keyring' + '\" --armor --export backup.' + testsite_domain ) }}"