diff --git a/lib/ansible/modules/system/cron.py b/lib/ansible/modules/system/cron.py
index 36213092f99..5d9532064f4 100644
--- a/lib/ansible/modules/system/cron.py
+++ b/lib/ansible/modules/system/cron.py
@@ -771,5 +771,5 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 
-main()
-
+if __name__ == '__main__':
+    main()
diff --git a/lib/ansible/modules/system/group.py b/lib/ansible/modules/system/group.py
index ceffd75369b..a642a3ee3e2 100755
--- a/lib/ansible/modules/system/group.py
+++ b/lib/ansible/modules/system/group.py
@@ -466,4 +466,6 @@ def main():
 
 # import module snippets
 from ansible.module_utils.basic import *
-main()
+
+if __name__ == '__main__':
+    main()
diff --git a/lib/ansible/modules/system/seboolean.py b/lib/ansible/modules/system/seboolean.py
index 973b5b2d20b..6d3b312d588 100644
--- a/lib/ansible/modules/system/seboolean.py
+++ b/lib/ansible/modules/system/seboolean.py
@@ -219,4 +219,6 @@ def main():
 # import module snippets
 from ansible.module_utils.basic import *
 from ansible.module_utils._text import to_bytes
-main()
+
+if __name__ == '__main__':
+    main()
diff --git a/lib/ansible/modules/system/service.py b/lib/ansible/modules/system/service.py
index af97e7df5a4..4b22f2654f7 100644
--- a/lib/ansible/modules/system/service.py
+++ b/lib/ansible/modules/system/service.py
@@ -1568,4 +1568,5 @@ def main():
 
 from ansible.module_utils.basic import *
 
-main()
+if __name__ == '__main__':
+    main()