Remove duplication.
diff --git a/Lib/test/test_urllib2.py b/Lib/test/test_urllib2.py
index 03cd927..83bb0a9 100644
--- a/Lib/test/test_urllib2.py
+++ b/Lib/test/test_urllib2.py
@@ -878,7 +878,7 @@
     def test_http_doubleslash(self):
         # Checks the presence of any unnecessary double slash in url does not
         # break anything. Previously, a double slash directly after the host
-        # could could cause incorrect parsing.
+        # could cause incorrect parsing.
         h = urllib.request.AbstractHTTPHandler()
         o = h.parent = MockOpener()
 
diff --git a/Lib/test/test_urlparse.py b/Lib/test/test_urlparse.py
index 4de190b..a6e7ee8 100644
--- a/Lib/test/test_urlparse.py
+++ b/Lib/test/test_urlparse.py
@@ -9,7 +9,7 @@
 RFC3986_BASE = 'http://a/b/c/d;p?q'
 SIMPLE_BASE  = 'http://a/b/c/d'
 
-# A list of test cases.  Each test case is a a two-tuple that contains
+# A list of test cases.  Each test case is a two-tuple that contains
 # a string with the query and a dictionary with the expected result.
 
 parse_qsl_test_cases = [
diff --git a/Lib/test/test_xmlrpc.py b/Lib/test/test_xmlrpc.py
index 04e762a..4ccc6ff 100644
--- a/Lib/test/test_xmlrpc.py
+++ b/Lib/test/test_xmlrpc.py
@@ -295,7 +295,7 @@
         global ADDR, PORT, URL
         ADDR, PORT = serv.socket.getsockname()
         #connect to IP address directly.  This avoids socket.create_connection()
-        #trying to connect to to "localhost" using all address families, which
+        #trying to connect to "localhost" using all address families, which
         #causes slowdown e.g. on vista which supports AF_INET6.  The server listens
         #on AF_INET only.
         URL = "http://%s:%d"%(ADDR, PORT)
@@ -354,7 +354,7 @@
         global ADDR, PORT, URL
         ADDR, PORT = serv.socket.getsockname()
         #connect to IP address directly.  This avoids socket.create_connection()
-        #trying to connect to to "localhost" using all address families, which
+        #trying to connect to "localhost" using all address families, which
         #causes slowdown e.g. on vista which supports AF_INET6.  The server listens
         #on AF_INET only.
         URL = "http://%s:%d"%(ADDR, PORT)