diff --git a/tests/test_vxi11.py b/tests/test_vxi11.py
index 84f1dcc..7a338d1 100644
--- a/tests/test_vxi11.py
+++ b/tests/test_vxi11.py
@@ -1,48 +1,46 @@
 #!/usr/bin/env python
 
-import nose
-from nose.tools import eq_
 from vxi11.vxi11 import parse_visa_resource_string
 
+
 def test_parse_visa_resource_string():
     f = parse_visa_resource_string
 
     res = f('TCPIP::10.0.0.1::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['suffix'], 'INSTR')
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['suffix'] == 'INSTR'
 
     res = f('TCPIP0::10.0.0.1::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP0')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['suffix'], 'INSTR')
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP0'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['suffix'] == 'INSTR'
 
     res = f('TCPIP::10.0.0.1::gpib,5::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['suffix'], 'INSTR')
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['suffix'] == 'INSTR'
 
     res = f('TCPIP0::10.0.0.1::gpib,5::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP0')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['arg2'], 'gpib,5')
-    eq_(res['suffix'], 'INSTR')
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP0'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['arg2'] == 'gpib,5'
+    assert res['suffix'] == 'INSTR'
 
     res = f('TCPIP0::10.0.0.1::usb0::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP0')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['arg2'], 'usb0')
-    eq_(res['suffix'], 'INSTR')
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP0'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['arg2'] == 'usb0'
+    assert res['suffix'] == 'INSTR'
 
     res = f('TCPIP0::10.0.0.1::usb0[1234::5678::MYSERIAL::0]::INSTR')
-    eq_(res['type'], 'TCPIP')
-    eq_(res['prefix'], 'TCPIP0')
-    eq_(res['arg1'], '10.0.0.1')
-    eq_(res['arg2'], 'usb0[1234::5678::MYSERIAL::0]')
-    eq_(res['suffix'], 'INSTR')
-
+    assert res['type'] == 'TCPIP'
+    assert res['prefix'] == 'TCPIP0'
+    assert res['arg1'] == '10.0.0.1'
+    assert res['arg2'] == 'usb0[1234::5678::MYSERIAL::0]'
+    assert res['suffix'] == 'INSTR'
diff --git a/vxi11/version.py b/vxi11/version.py
index e46aee1..8969d49 100644
--- a/vxi11/version.py
+++ b/vxi11/version.py
@@ -1 +1 @@
-__version__ = '0.9'
+__version__ = '0.9.1'
diff --git a/vxi11/vxi11.py b/vxi11/vxi11.py
index 231582d..c7f4221 100644
--- a/vxi11/vxi11.py
+++ b/vxi11/vxi11.py
@@ -131,8 +131,8 @@ def parse_visa_resource_string(resource_string):
     # TCPIP0::10.0.0.1::gpib,5::INSTR
     # TCPIP0::10.0.0.1::usb0::INSTR
     # TCPIP0::10.0.0.1::usb0[1234::5678::MYSERIAL::0]::INSTR
-    m = re.match('^(?P<prefix>(?P<type>TCPIP)\d*)(::(?P<arg1>[^\s:]+))'
-            '(::(?P<arg2>[^\s:]+(\[.+\])?))?(::(?P<suffix>INSTR))$',
+    m = re.match(r'^(?P<prefix>(?P<type>TCPIP)\d*)(::(?P<arg1>[^\s:]+))'
+            r'(::(?P<arg2>[^\s:]+(\[.+\])?))?(::(?P<suffix>INSTR))$',
             resource_string, re.I)
 
     if m is not None: