diff --git a/test/test_tcp.py b/test/test_tcp.py
index 3b36bdf..4a5c9bc 100644
--- a/test/test_tcp.py
+++ b/test/test_tcp.py
@@ -16,7 +16,7 @@
     def setUp(self):
         super(TestTCP, self).setUp()
         self.vapi.session_enable_disable(is_enabled=1)
-        self.create_loopback_interfaces(range(2))
+        self.create_loopback_interfaces(2)
 
         table_id = 0