diff --git a/ryu/tests/test_lib.py b/ryu/tests/test_lib.py
index 180b236b..13bc2af5 100755
--- a/ryu/tests/test_lib.py
+++ b/ryu/tests/test_lib.py
@@ -9,7 +9,6 @@ import logging
 from nose import result
 from nose import core
 from nose import config
-from nose.plugins.skip import SkipTest
 
 
 class _AnsiColorizer(object):
diff --git a/ryu/tests/unit/lib/test_ip.py b/ryu/tests/unit/lib/test_ip.py
index 0de3ad6f..0b7b75f9 100644
--- a/ryu/tests/unit/lib/test_ip.py
+++ b/ryu/tests/unit/lib/test_ip.py
@@ -4,7 +4,6 @@ import struct
 import netaddr
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 
 from ryu.lib import ip
 
diff --git a/ryu/tests/unit/lib/test_mac.py b/ryu/tests/unit/lib/test_mac.py
index 8b5e62b1..a0125d35 100644
--- a/ryu/tests/unit/lib/test_mac.py
+++ b/ryu/tests/unit/lib/test_mac.py
@@ -21,7 +21,6 @@ import struct
 import netaddr
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 
 from ryu.lib import mac
 
diff --git a/ryu/tests/unit/ofproto/test_parser_v12.py b/ryu/tests/unit/ofproto/test_parser_v12.py
index 1ea9b272..bfa2d597 100644
--- a/ryu/tests/unit/ofproto/test_parser_v12.py
+++ b/ryu/tests/unit/ofproto/test_parser_v12.py
@@ -20,7 +20,6 @@ import logging
 import socket
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto.ofproto_v1_2_parser import *
 from ryu.ofproto import ofproto_v1_2_parser
 from ryu.ofproto import ofproto_v1_2
diff --git a/ryu/tests/unit/ofproto/test_parser_v13.py b/ryu/tests/unit/ofproto/test_parser_v13.py
index 63fe40ce..f3f119a3 100644
--- a/ryu/tests/unit/ofproto/test_parser_v13.py
+++ b/ryu/tests/unit/ofproto/test_parser_v13.py
@@ -20,7 +20,6 @@ import logging
 import socket
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto.ofproto_v1_3_parser import *
 from ryu.ofproto import ofproto_v1_3_parser
 from ryu.ofproto import ofproto_v1_3
diff --git a/ryu/tests/unit/packet/test_arp.py b/ryu/tests/unit/packet/test_arp.py
index af6e977b..40e28131 100644
--- a/ryu/tests/unit/packet/test_arp.py
+++ b/ryu/tests/unit/packet/test_arp.py
@@ -20,7 +20,6 @@ import logging
 import struct
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether
 from ryu.lib.packet.ethernet import ethernet
 from ryu.lib.packet.packet import Packet
diff --git a/ryu/tests/unit/packet/test_cfm.py b/ryu/tests/unit/packet/test_cfm.py
index 49207e92..706e0be0 100644
--- a/ryu/tests/unit/packet/test_cfm.py
+++ b/ryu/tests/unit/packet/test_cfm.py
@@ -20,7 +20,6 @@ import inspect
 import struct
 
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.lib import addrconv
 from ryu.lib.packet import cfm
 
diff --git a/ryu/tests/unit/packet/test_ethernet.py b/ryu/tests/unit/packet/test_ethernet.py
index ded526e4..2555404f 100644
--- a/ryu/tests/unit/packet/test_ethernet.py
+++ b/ryu/tests/unit/packet/test_ethernet.py
@@ -21,7 +21,6 @@ import struct
 import netaddr
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet.ethernet import ethernet
 from ryu.lib.packet.packet import Packet
diff --git a/ryu/tests/unit/packet/test_icmpv6.py b/ryu/tests/unit/packet/test_icmpv6.py
index 745dacd0..d0523be9 100644
--- a/ryu/tests/unit/packet/test_icmpv6.py
+++ b/ryu/tests/unit/packet/test_icmpv6.py
@@ -21,7 +21,6 @@ import struct
 import inspect
 
 from nose.tools import ok_, eq_, nottest, raises
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet.ethernet import ethernet
 from ryu.lib.packet.packet import Packet
diff --git a/ryu/tests/unit/packet/test_ipv4.py b/ryu/tests/unit/packet/test_ipv4.py
index 752dae73..55bc6b14 100644
--- a/ryu/tests/unit/packet/test_ipv4.py
+++ b/ryu/tests/unit/packet/test_ipv4.py
@@ -20,7 +20,6 @@ import logging
 import struct
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet import packet_utils
 from ryu.lib.packet.ethernet import ethernet
diff --git a/ryu/tests/unit/packet/test_ipv6.py b/ryu/tests/unit/packet/test_ipv6.py
index 6615f9dd..805c3dcf 100644
--- a/ryu/tests/unit/packet/test_ipv6.py
+++ b/ryu/tests/unit/packet/test_ipv6.py
@@ -20,7 +20,6 @@ import inspect
 import struct
 
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.lib import addrconv
 from ryu.lib import ip
 from ryu.lib.packet import ipv6
diff --git a/ryu/tests/unit/packet/test_mpls.py b/ryu/tests/unit/packet/test_mpls.py
index 18a62522..bce393c6 100644
--- a/ryu/tests/unit/packet/test_mpls.py
+++ b/ryu/tests/unit/packet/test_mpls.py
@@ -19,7 +19,6 @@ import logging
 import inspect
 
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.lib.packet import mpls
 
 
diff --git a/ryu/tests/unit/packet/test_packet.py b/ryu/tests/unit/packet/test_packet.py
index 16a5c9db..152c9f4f 100644
--- a/ryu/tests/unit/packet/test_packet.py
+++ b/ryu/tests/unit/packet/test_packet.py
@@ -21,7 +21,6 @@ import struct
 import array
 import inspect
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet import *
 from ryu.lib import addrconv
diff --git a/ryu/tests/unit/packet/test_tcp.py b/ryu/tests/unit/packet/test_tcp.py
index 3cc5777b..94154c8b 100644
--- a/ryu/tests/unit/packet/test_tcp.py
+++ b/ryu/tests/unit/packet/test_tcp.py
@@ -20,7 +20,6 @@ import logging
 import struct
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet.packet import Packet
 from ryu.lib.packet.tcp import tcp
diff --git a/ryu/tests/unit/packet/test_udp.py b/ryu/tests/unit/packet/test_udp.py
index c8b3e482..0d7d0aa9 100644
--- a/ryu/tests/unit/packet/test_udp.py
+++ b/ryu/tests/unit/packet/test_udp.py
@@ -20,7 +20,6 @@ import logging
 import struct
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet.packet import Packet
 from ryu.lib.packet.udp import udp
diff --git a/ryu/tests/unit/packet/test_vlan.py b/ryu/tests/unit/packet/test_vlan.py
index fff25c82..df54db7e 100644
--- a/ryu/tests/unit/packet/test_vlan.py
+++ b/ryu/tests/unit/packet/test_vlan.py
@@ -20,7 +20,6 @@ import logging
 import struct
 from struct import *
 from nose.tools import *
-from nose.plugins.skip import Skip, SkipTest
 from ryu.ofproto import ether, inet
 from ryu.lib.packet.ethernet import ethernet
 from ryu.lib.packet.packet import Packet