diff --git a/library/multi_users.py b/library/multi_users.py
index 96c669b..71f7b46 100644
--- a/library/multi_users.py
+++ b/library/multi_users.py
@@ -73,6 +73,7 @@ def __init__(self, user, module):
         self.state = user.get("state")
         self.system = user.get("system", False)
         self.uid = user.get("uid", None)
+        self.non_unique = user.get("non_unique", None)
         self.umask = user.get("umask", None)
         self.update_password = user.get("update_password", 'always')
         self.username = user.get("username")
@@ -300,7 +301,7 @@ def create_user(self):
 
         if self.uid is not None:
             args.append('-u')
-            args.append(self.uid)
+            args.append(str(self.uid))
 
             if self.non_unique:
                 args.append('-o')
diff --git a/molecule/configured/group_vars/all/vars.yml b/molecule/configured/group_vars/all/vars.yml
index 0efc67b..939eaad 100644
--- a/molecule/configured/group_vars/all/vars.yml
+++ b/molecule/configured/group_vars/all/vars.yml
@@ -1,6 +1,7 @@
 ---
 users:
   - username: foo-bar
+    uid: 2000
     update_password: always
     comment: Foo Bar
     # password: foo-barbar