diff --git a/openerp/osv/fields.py b/openerp/osv/fields.py
index 871fc32f884..ff02a8c89f9 100644
--- a/openerp/osv/fields.py
+++ b/openerp/osv/fields.py
@@ -35,14 +35,11 @@
 import base64
 import datetime as DT
 import re
-import string
-import sys
 import warnings
 import xmlrpclib
 from psycopg2 import Binary
 
 import openerp
-import openerp.netsvc as netsvc
 import openerp.tools as tools
 from openerp.tools.translate import _
 from openerp.tools import float_round, float_repr
diff --git a/openerp/tests/common.py b/openerp/tests/common.py
index 44696384ce7..93e5f6d5bc2 100644
--- a/openerp/tests/common.py
+++ b/openerp/tests/common.py
@@ -1,5 +1,4 @@
 # -*- coding: utf-8 -*-
-import os
 import time
 import xmlrpclib
 
diff --git a/openerp/tests/test_orm.py b/openerp/tests/test_orm.py
index c11d4cd19d2..cf880933fe5 100644
--- a/openerp/tests/test_orm.py
+++ b/openerp/tests/test_orm.py
@@ -1,4 +1,3 @@
-import os
 import unittest2
 
 import openerp
diff --git a/openerp/tiny_socket.py b/openerp/tiny_socket.py
index b4bed83a4c0..f86797f0f67 100644
--- a/openerp/tiny_socket.py
+++ b/openerp/tiny_socket.py
@@ -22,7 +22,6 @@
 import socket
 import cPickle
 import cStringIO
-import marshal
 
 import netsvc