diff --git a/keystoneclient/openstack/common/jsonutils.py b/keystoneclient/openstack/common/jsonutils.py
index d30171370..88088a134 100644
--- a/keystoneclient/openstack/common/jsonutils.py
+++ b/keystoneclient/openstack/common/jsonutils.py
@@ -41,6 +41,7 @@ import json
 import types
 import xmlrpclib
 
+import netaddr
 import six
 
 from keystoneclient.openstack.common import timeutils
@@ -137,6 +138,8 @@ def to_primitive(value, convert_instances=False, convert_datetime=True,
             # Likely an instance of something. Watch for cycles.
             # Ignore class member vars.
             return recursive(value.__dict__, level=level + 1)
+        elif isinstance(value, netaddr.IPAddress):
+            return six.text_type(value)
         else:
             if any(test(value) for test in _nasty_type_tests):
                 return six.text_type(value)
diff --git a/keystoneclient/openstack/common/timeutils.py b/keystoneclient/openstack/common/timeutils.py
index 31ea57467..bd60489e5 100644
--- a/keystoneclient/openstack/common/timeutils.py
+++ b/keystoneclient/openstack/common/timeutils.py
@@ -23,6 +23,7 @@ import calendar
 import datetime
 
 import iso8601
+import six
 
 
 # ISO 8601 extended time format with microseconds
@@ -75,14 +76,14 @@ def normalize_time(timestamp):
 
 def is_older_than(before, seconds):
     """Return True if before is older than seconds."""
-    if isinstance(before, basestring):
+    if isinstance(before, six.string_types):
         before = parse_strtime(before).replace(tzinfo=None)
     return utcnow() - before > datetime.timedelta(seconds=seconds)
 
 
 def is_newer_than(after, seconds):
     """Return True if after is newer than seconds."""
-    if isinstance(after, basestring):
+    if isinstance(after, six.string_types):
         after = parse_strtime(after).replace(tzinfo=None)
     return after - utcnow() > datetime.timedelta(seconds=seconds)
 
@@ -111,9 +112,9 @@ utcnow.override_time = None
 
 
 def set_time_override(override_time=datetime.datetime.utcnow()):
-    """
-    Override utils.utcnow to return a constant time or a list thereof,
-    one at a time.
+    """Overrides utils.utcnow.
+
+    Make it return a constant time or a list thereof, one at a time.
     """
     utcnow.override_time = override_time
 
@@ -141,7 +142,7 @@ def clear_time_override():
 def marshall_now(now=None):
     """Make an rpc-safe datetime with microseconds.
 
-       Note: tzinfo is stripped, but not required for relative times.
+    Note: tzinfo is stripped, but not required for relative times.
     """
     if not now:
         now = utcnow()
@@ -162,7 +163,8 @@ def unmarshall_time(tyme):
 
 
 def delta_seconds(before, after):
-    """
+    """Return the difference between two timing objects.
+
     Compute the difference in seconds between two date, time, or
     datetime objects (as a float, to microsecond resolution).
     """
@@ -175,8 +177,7 @@ def delta_seconds(before, after):
 
 
 def is_soon(dt, window):
-    """
-    Determines if time is going to happen in the next window seconds.
+    """Determines if time is going to happen in the next window seconds.
 
     :params dt: the time
     :params window: minimum seconds to remain to consider the time not soon
diff --git a/requirements.txt b/requirements.txt
index 62c0d2021..629e59c13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,3 +7,4 @@ requests>=0.8.8
 simplejson
 six
 oslo.config>=1.1.0
+netaddr
diff --git a/test-requirements.txt b/test-requirements.txt
index 8e62d5f23..d48e83328 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,7 +3,6 @@ pep8==1.4.5
 pyflakes==0.7.2
 flake8==2.0
 hacking>=0.5.3,<0.6
-
 coverage
 discover
 fixtures