diff --git a/roles/copr/backend/tasks/mount_fs.yml b/roles/copr/backend/tasks/mount_fs.yml
index 5a890cb90a..e8560425df 100644
--- a/roles/copr/backend/tasks/mount_fs.yml
+++ b/roles/copr/backend/tasks/mount_fs.yml
@@ -23,9 +23,7 @@
       stat:
         path: "/dev/disk/by-id/{{ item }}"
       register: stat_raid
-      loop:
-        - "{{ copr_backend_data_raid10_volumes }}"
-        - "{{ copr_backend_data_2_raid1_volumes }}"
+      loop: "{{ copr_backend_data_raid10_volumes + copr_backend_data_2_raid1_volumes }}"
 
     - name: fail if raid volumes do not exist
       debug: msg=checked