diff --git a/concourse/tasks/test_diskquota.yml b/concourse/tasks/test_diskquota.yml
index 0dadd31e..aa622bac 100644
--- a/concourse/tasks/test_diskquota.yml
+++ b/concourse/tasks/test_diskquota.yml
@@ -10,3 +10,4 @@ inputs:
 run:
   path: diskquota_src/concourse/scripts/test_diskquota.sh
 params:
+  DISKQUOTA_OS: