diff --git a/roles/lmn_misc/tasks/main.yml b/roles/lmn_misc/tasks/main.yml
index 22134c5..7c15ede 100644
--- a/roles/lmn_misc/tasks/main.yml
+++ b/roles/lmn_misc/tasks/main.yml
@@ -98,7 +98,7 @@
       export superusers
       password_pbkdf2 root {{ grub_pwd }}
   notify: Run update-grub
-  when: grub_pwd|default(false)
+  when: grub_pwd | bool | default(false)
 
 - name: Allow booting grub menu entries
   ansible.builtin.lineinfile:
diff --git a/roles/lmn_network/tasks/main.yml b/roles/lmn_network/tasks/main.yml
index 7a39349..571c107 100644
--- a/roles/lmn_network/tasks/main.yml
+++ b/roles/lmn_network/tasks/main.yml
@@ -5,14 +5,14 @@
     mode: '0644'
     content: >
       {{ apt_conf }}
-  when: apt_conf|default(false)
+  when: apt_conf | bool | default(false)
 
 - name: Set NTP server
   ansible.builtin.lineinfile:
     path: /etc/systemd/timesyncd.conf
     insertafter: '^#NTP='
     line: NTP={{ ntp_serv }}
-  when: ntp_serv|default(false)
+  when: ntp_serv | bool | default(false)
 
 - name: Add proposed-updates repository
   ansible.builtin.apt_repository:
diff --git a/roles/lmn_printer/tasks/main.yml b/roles/lmn_printer/tasks/main.yml
index 960b1fa..996cb2e 100644
--- a/roles/lmn_printer/tasks/main.yml
+++ b/roles/lmn_printer/tasks/main.yml
@@ -37,7 +37,7 @@
     line: "SystemGroup root lpadmin {{ printer_admin_group }}"
     regexp: '^SystemGroup'
     state: present
-  when: printer_admin_group | length
+  when: printer_admin_group | length > 0
 
 - name: Disable cups-browsed
   ansible.builtin.systemd: