diff --git a/purge-cluster.yml b/purge-cluster.yml
index ab2b8ec13..d5e001013 100644
--- a/purge-cluster.yml
+++ b/purge-cluster.yml
@@ -261,7 +261,7 @@
       rbdmirror_group_name in group_names
 
   - name: check for anything running ceph
-    shell: "ps awux | grep -v grep | grep -q -- ceph-"
+    shell: "ps awux | grep -- [c]eph-"
     register: check_for_running_ceph
     failed_when: check_for_running_ceph.rc == 0