diff --git a/tcp_tests/managers/openstack_manager.py b/tcp_tests/managers/openstack_manager.py
index 55af1e2..b3b7a7e 100644
--- a/tcp_tests/managers/openstack_manager.py
+++ b/tcp_tests/managers/openstack_manager.py
@@ -18,14 +18,15 @@
 class OpenstackManager(ExecuteCommandsMixin):
     """docstring for OpenstackManager"""
 
-    _config = None
-    _underlay = None
+    __config = None
+    __underlay = None
 
     def __init__(self, config, underlay, salt):
-        self._config = config
-        self._underlay = underlay
+        self.__config = config
+        self.__underlay = underlay
         self._salt = salt
-        super(OpenstackManager, self).__init__()
+        super(OpenstackManager, self).__init__(
+            config=config, underlay=underlay)
 
     def install(self, commands):
         self.execute_commands(commands,