diff --git a/tasks/list-configured-runners-unix.yml b/tasks/list-configured-runners-unix.yml
index 6b746dc..48b72ed 100644
--- a/tasks/list-configured-runners-unix.yml
+++ b/tasks/list-configured-runners-unix.yml
@@ -6,6 +6,10 @@
   check_mode: false
   become: "{{ gitlab_runner_system_mode }}"
 
+- name: Filter valid JSON lines
+  ansible.builtin.set_fact:
+    valid_json_lines: "{{ registered_runners_json_result.stderr_lines | select('search', '^\\{.*\\}$') | list }}"
+
 - name: Initialze runner list
   ansible.builtin.set_fact:
     registered_gitlab_runner_names: []
@@ -15,8 +19,8 @@
     registered_gitlab_runner_names: "{{ registered_gitlab_runner_names + [json_item['msg']] }}"
   vars:
     json_item: "{{ item | from_json }}"
-  loop: "{{ registered_runners_json_result.stderr_lines }}"
-  when: "'Executor' in json_item"
+  loop: "{{ valid_json_lines }}"
+  when: json_item.get('Executor') is defined
   no_log: "{{ gitlab_runner_no_log_secrets | default(omit) }}"
 
 - name: Print registered runners