diff --git a/ansible/roles/blazar/tasks/bootstrap.yml b/ansible/roles/blazar/tasks/bootstrap.yml
index b6fef2aac0..89e32de338 100644
--- a/ansible/roles/blazar/tasks/bootstrap.yml
+++ b/ansible/roles/blazar/tasks/bootstrap.yml
@@ -46,7 +46,7 @@
   changed_when: blazar_host_aggregate | success
   failed_when:
     - blazar_host_aggregate.rc != 0
-    - "{{ 'already' not in blazar_host_aggregate.stderr }}"
+    - blazar_host_aggregate.stderr.find('already') == -1
   run_once: True
   delegate_to: "{{ groups['blazar-api'][0] }}"