diff --git a/tasks/main.yml b/tasks/main.yml
index d5abcd4..77ae886 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -5,25 +5,41 @@
   with_dict: "{{ unix_groups }}"
   loop_control:
     loop_var: unix_group
-  when: unix_group.value.state is defined and unix_group.value.state == 'absent'
+  when: unix_groups is defined and
+        unix_groups | length > 0 and
+        unix_group.value.state is defined and
+        unix_group.value.state == 'absent'
 
 - name: Remove unix user
   include_tasks: remove_unix_user.yml
   with_dict: "{{ unix_users }}"
   loop_control:
     loop_var: unix_user
-  when: unix_user.value.state is defined and unix_user.value.state == 'absent'
+  when: unix_groups is defined and
+        unix_groups | length > 0 and
+        unix_user.value.state is defined and
+        unix_user.value.state == 'absent'
 
 - name: Create unix groups
   include_tasks: create_unix_group.yml
   with_dict: "{{ unix_groups }}"
   loop_control:
     loop_var: unix_group
-  when: unix_group.value.state is defined and unix_group.value.state == 'present' or unix_group.value.state is not defined
+  when: unix_groups is defined and
+        unix_groups | length > 0 and
+        (
+          (unix_group.value.state is defined and unix_group.value.state == 'present') or
+          unix_group.value.state is not defined
+        )
 
 - name: Create unix users
   include_tasks: create_unix_user.yml
   with_dict: "{{ unix_users }}"
   loop_control:
     loop_var: unix_user
-  when: unix_user.value.state is defined and unix_user.value.state == 'present' or unix_user.value.state is not defined
+  when: unix_groups is defined and
+        unix_groups | length > 0 and
+        (
+          (unix_user.value.state is defined and unix_user.value.state == 'present') or
+          unix_user.value.state is not defined
+        )