Hide Backend Issues

I have enabled hide backend feature but it only seems to be worked on wp-admin (for example, http://test.com/wp-admin) but not wp-login (for example http://test.com/wp-login).

In short, when a visitors visited “http://test.com/wp-admin”, it will redirect to 404 error but when a visitors can login through “http://test.com/wp-login”.

According to iTheme Security Hide Backend Features, “Hides the login page (wp-login.php, wp-admin, admin and login) making it harder to find by automated attacks and making it easier for users unfamiliar with the WordPress platform.”

My blog does not allow any user registration, therefore, I don’t want wp-admin and wp-login exposed to the public. So, is there anyway to fix it?

Thank you

https://wordpress.org/plugins/better-wp-security/