diff --git a/roles/taskotron/buildslave/tasks/main.yml b/roles/taskotron/buildslave/tasks/main.yml
index f836326a01..db54a45da2 100644
--- a/roles/taskotron/buildslave/tasks/main.yml
+++ b/roles/taskotron/buildslave/tasks/main.yml
@@ -29,7 +29,7 @@
   when: deployment_type in ['qa-stg'] and ansible_distribution_major_version|int > 21 and ansible_cmdline.ostree is not defined
 
 - name: add the buildslave user
-  user: name=buildslave
+  user: name=buildslave groups=mock
   when: deployment_type in ['prod', 'stg', 'local', 'qa-stg']
 
 - name: add buildslaves group