diff --git a/netlib/certutils.py b/netlib/certutils.py
index e1407936e..b3ba1dcfc 100644
--- a/netlib/certutils.py
+++ b/netlib/certutils.py
@@ -1,4 +1,4 @@
-import os, ssl, hashlib, socket, time, datetime, tempfile, shutil
+import os, ssl, time, datetime, tempfile, shutil
 from pyasn1.type import univ, constraint, char, namedtype, tag
 from pyasn1.codec.der.decoder import decode
 from pyasn1.error import PyAsn1Error
diff --git a/netlib/http.py b/netlib/http.py
index 076baf873..29bcf43db 100644
--- a/netlib/http.py
+++ b/netlib/http.py
@@ -279,7 +279,7 @@ def read_response(rfile, method, body_size_limit):
     if line == "\r\n" or line == "\n": # Possible leftover from previous message
         line = rfile.readline()
     if not line:
-        raise HttpError(502, "Blank server response.")
+        raise HttpError(502, "Server disconnect.")
     parts = line.strip().split(" ", 2)
     if len(parts) == 2: # handle missing message gracefully
         parts.append("")
diff --git a/netlib/tcp.py b/netlib/tcp.py
index 556f97ac0..0a15d2ac8 100644
--- a/netlib/tcp.py
+++ b/netlib/tcp.py
@@ -139,7 +139,7 @@ class Reader(_FileLike):
                 raise NetLibTimeout
             except socket.error:
                 raise NetLibDisconnect
-            except SSL.SysCallError, v:
+            except SSL.SysCallError:
                 raise NetLibDisconnect
             self.first_byte_timestamp = self.first_byte_timestamp or time.time()
             if not data:
@@ -322,7 +322,7 @@ class BaseHandler:
                 self.connection.shutdown()
             else:
                 self.connection.shutdown(socket.SHUT_RDWR)
-        except (socket.error, SSL.Error), v:
+        except (socket.error, SSL.Error):
             # Socket probably already closed
             pass
         self.connection.close()
diff --git a/netlib/wsgi.py b/netlib/wsgi.py
index 4fa2c5372..dffc2ace7 100644
--- a/netlib/wsgi.py
+++ b/netlib/wsgi.py
@@ -1,4 +1,4 @@
-import cStringIO, urllib, time, sys, traceback
+import cStringIO, urllib, time, traceback
 import odict
 
 
@@ -128,13 +128,13 @@ class WSGIAdaptor:
                 write(i)
             if not state["headers_sent"]:
                 write("")
-        except Exception, v:
+        except Exception:
             try:
                 s = traceback.format_exc()
                 errs.write(s)
                 self.error_page(soc, state["headers_sent"], s)
-            except Exception, v:    # pragma: no cover
-                pass                # pragma: no cover
+            except Exception:    # pragma: no cover
+                pass
         return errs.getvalue()
 
 
diff --git a/test/test_http.py b/test/test_http.py
index ed16fb4ae..666dfdbb0 100644
--- a/test/test_http.py
+++ b/test/test_http.py
@@ -222,7 +222,7 @@ def test_read_response():
         r = cStringIO.StringIO(data)
         return  http.read_response(r, method, limit)
 
-    tutils.raises("blank server response", tst, "", "GET", None)
+    tutils.raises("server disconnect", tst, "", "GET", None)
     tutils.raises("invalid server response", tst, "foo", "GET", None)
     data = """
         HTTP/1.1 200 OK
diff --git a/test/test_tcp.py b/test/test_tcp.py
index f12a131b6..5b616969d 100644
--- a/test/test_tcp.py
+++ b/test/test_tcp.py
@@ -1,4 +1,4 @@
-import cStringIO, threading, Queue, time, socket
+import cStringIO, Queue, time, socket
 from netlib import tcp, certutils, test
 import mock
 import tutils