diff --git a/neutron/tests/functional/test_server.py b/neutron/tests/functional/test_server.py
index 04234283f47..7eb66d4663f 100644
--- a/neutron/tests/functional/test_server.py
+++ b/neutron/tests/functional/test_server.py
@@ -110,7 +110,10 @@ class TestNeutronServer(base.BaseTestCase):
 
         def safe_ppid(proc):
             try:
-                return proc.ppid
+                if psutil.version_info[0] == 1:
+                    return proc.ppid
+                else:
+                    return proc.ppid()
             except psutil.NoSuchProcess:
                 return None