diff --git a/roles/taskotron/buildslave/tasks/main.yml b/roles/taskotron/buildslave/tasks/main.yml
index e9742ac294..d5f1cf23fa 100644
--- a/roles/taskotron/buildslave/tasks/main.yml
+++ b/roles/taskotron/buildslave/tasks/main.yml
@@ -40,7 +40,7 @@
   group: name={{ item }}
   when: deployment_type == 'stg' or deployment_type in ['dev', 'prod']
   with_items:
-    - {{ slaves_group }}
+    - "{{ slaves_group }}"
     - testcloud
     - taskotron