diff --git a/ryu/tests/unit/lib/ovs/test_vsctl.py b/ryu/tests/unit/lib/ovs/test_vsctl.py
index 84698eec..92e00f62 100644
--- a/ryu/tests/unit/lib/ovs/test_vsctl.py
+++ b/ryu/tests/unit/lib/ovs/test_vsctl.py
@@ -35,7 +35,7 @@ LOG = logging.getLogger(__name__)
 DOCKER_IMAGE_MININET = 'osrg/ryu-book'
 
 OVSDB_MANAGER_ADDR = 'ptcp:6640'
-OVSDB_SWITCH_ADDR = 'tcp:%s:6640'
+OVSDB_SWITCH_ADDR = 'tcp:0.0.0.0:6640'
 
 
 def setUpModule():
@@ -93,7 +93,7 @@ class TestVSCtl(unittest.TestCase):
 
     @classmethod
     def _docker_run(cls, image):
-        return _run('docker run --privileged -t -d %s' % image)[0]
+        return _run('docker run --privileged -t -d -p 6640:6640 %s' % image)[0]
 
     @classmethod
     def _docker_stop(cls, container):
@@ -124,7 +124,7 @@ class TestVSCtl(unittest.TestCase):
 
     @classmethod
     def _set_up_vsctl(cls):
-        cls.vsctl = vsctl.VSCtl(OVSDB_SWITCH_ADDR % cls.container_mn_ip)
+        cls.vsctl = vsctl.VSCtl(OVSDB_SWITCH_ADDR)
 
     @classmethod
     def setUpClass(cls):
diff --git a/tools/install_venv.py b/tools/install_venv.py
index 29639801..13a5bc17 100644
--- a/tools/install_venv.py
+++ b/tools/install_venv.py
@@ -70,29 +70,29 @@ def check_dependencies():
     if not HAS_VIRTUALENV:
         raise Exception('Virtualenv not found. ' + \
                          'Try installing python-virtualenv')
-    print 'done.'
+    print('done.')  # pylint: disable=print-statement
 
 
 def create_virtualenv(venv=VENV, install_pip=False):
     """Creates the virtual environment and installs PIP only into the
     virtual environment
     """
-    print 'Creating venv...',
+    print('Creating venv...')  # pylint: disable=print-statement
 
     install = ['virtualenv', '-q', venv]
     run_command(install)
 
-    print 'done.'
-    print 'Installing pip in virtualenv...',
+    print('done.')  # pylint: disable=print-statement
+    print('Installing pip in virtualenv...')  # pylint: disable=print-statement
     if install_pip and \
             not run_command(['tools/with_venv.sh', 'easy_install',
                              'pip>1.0']):
         die("Failed to install pip.")
-    print 'done.'
+    print('done.')  # pylint: disable=print-statement
 
 
 def install_dependencies(venv=VENV):
-    print 'Installing dependencies with pip (this can take a while)...'
+    print('Installing dependencies with pip (this can take a while)...')  # pylint: disable=print-statement
     run_command(['tools/with_venv.sh', 'pip', 'install', '-r',
                  PIP_REQUIRES], redirect_output=False)
     run_command(['tools/with_venv.sh', 'pip', 'install', '-r',
@@ -126,7 +126,7 @@ def print_help():
 
  Also, make test will automatically use the virtualenv.
     """
-    print help
+    print(help)  # pylint: disable=print-statement
 
 
 def main(argv):