diff --git a/tasks/configure_package_repositories.yml b/tasks/configure_package_repositories.yml
index b35dc16e58652150394bd911390c219c69c82a56..1bf3f990bb54f65b7afe1a8ed6a430a9df7b3754 100644
--- a/tasks/configure_package_repositories.yml
+++ b/tasks/configure_package_repositories.yml
@@ -43,7 +43,7 @@
             name: "slub"
             pdiffs: true
             signed_by: "{{ vault_debrepo_url }}deb-repository/pub.gpg.key"
-            suites: "{{ ( ansible_distribution == 'Ubuntu' ) | ternary( releasenames[ansible_lsb.codename], ansible_lsb.codename ) }}"
+            suites: "{{ (ansible_distribution == 'Ubuntu') | ternary(releasenames[ansible_lsb.codename], ansible_lsb.codename) }}"
             uris: "{{ vault_debrepo_url }}deb-repository"
           notify: update package cache
         - name: >