diff --git a/test/vpp_mpls_tunnel_interface.py b/test/vpp_mpls_tunnel_interface.py
index 5989361..6c8941a 100644
--- a/test/vpp_mpls_tunnel_interface.py
+++ b/test/vpp_mpls_tunnel_interface.py
@@ -1,4 +1,3 @@
-
 from vpp_interface import VppInterface
 
 
@@ -8,7 +7,7 @@
     """
 
     def __init__(self, test, paths, is_multicast=0, is_l2=0):
-        """ Create MPLS Tunnel interface """
+        """Create MPLS Tunnel interface"""
         super(VppMPLSTunnelInterface, self).__init__(test)
         self.t_paths = paths
         self.is_multicast = is_multicast
@@ -19,28 +18,29 @@
 
     def add_vpp_config(self):
         reply = self.test.vapi.mpls_tunnel_add_del(
-            0xffffffff,
+            0xFFFFFFFF,
             self.encoded_paths,
             is_multicast=self.is_multicast,
-            l2_only=self.is_l2)
+            l2_only=self.is_l2,
+        )
         self.set_sw_if_index(reply.sw_if_index)
         self.tunnel_index = reply.tunnel_index
         self._test.registry.register(self, self._test.logger)
 
     def remove_vpp_config(self):
         reply = self.test.vapi.mpls_tunnel_add_del(
-            self.sw_if_index,
-            self.encoded_paths,
-            is_add=0)
+            self.sw_if_index, self.encoded_paths, is_add=0
+        )
 
     def query_vpp_config(self):
         dump = self._test.vapi.mpls_tunnel_dump()
         for t in dump:
-            if self.sw_if_index == t.mt_tunnel.mt_sw_if_index and \
-               self.tunnel_index == t.mt_tunnel.mt_tunnel_index:
+            if (
+                self.sw_if_index == t.mt_tunnel.mt_sw_if_index
+                and self.tunnel_index == t.mt_tunnel.mt_tunnel_index
+            ):
                 return True
         return False
 
     def object_id(self):
-        return ("mpls-tunnel%d-%d" % (self.tunnel_index,
-                                      self.sw_if_index))
+        return "mpls-tunnel%d-%d" % (self.tunnel_index, self.sw_if_index)