diff --git a/tasks/set_vars.yml b/tasks/set_vars.yml
index 46c1032..3e18494 100644
--- a/tasks/set_vars.yml
+++ b/tasks/set_vars.yml
@@ -25,6 +25,7 @@
       command: systemctl is-system-running
       register: __is_system_running
       changed_when: false
+      check_mode: false
       failed_when: false
 
     - name: Require installed systemd
diff --git a/tests/tasks/check_header.yml b/tests/tasks/check_header.yml
index 607320f..efcac83 100644
--- a/tests/tasks/check_header.yml
+++ b/tests/tasks/check_header.yml
@@ -9,8 +9,8 @@
 - name: Check for presence of ansible managed header, fingerprint
   assert:
     that:
-      - ansible_managed in content
+      - __ansible_managed in content
       - __fingerprint in content
   vars:
     content: "{{ (__file_content | d(__content)).content | b64decode }}"
-    ansible_managed: "{{ lookup('template', 'get_ansible_managed.j2') }}"
+    __ansible_managed: "{{ lookup('template', 'get_ansible_managed.j2') }}"