diff --git a/swift/cli/ringbuilder.py b/swift/cli/ringbuilder.py
index d87c73a6aa..fd4461b91f 100644
--- a/swift/cli/ringbuilder.py
+++ b/swift/cli/ringbuilder.py
@@ -1067,7 +1067,7 @@ swift-ring-builder <builder_file> dispersion <search_filter> [options]
             print('Worst tier is %.06f (%s)' % (report['max_dispersion'],
                                                 report['worst_tier']))
         if report['graph']:
-            replica_range = range(int(math.ceil(builder.replicas + 1)))
+            replica_range = list(range(int(math.ceil(builder.replicas + 1))))
             part_count_width = '%%%ds' % max(len(str(builder.parts)), 5)
             replica_counts_tmpl = ' '.join(part_count_width for i in
                                            replica_range)
diff --git a/swift/common/daemon.py b/swift/common/daemon.py
index e8e398797f..32e6b696b7 100644
--- a/swift/common/daemon.py
+++ b/swift/common/daemon.py
@@ -173,7 +173,7 @@ class DaemonStrategy(object):
             yield per_worker_options
 
     def spawned_pids(self):
-        return self.options_by_pid.keys()
+        return list(self.options_by_pid.keys())
 
     def register_worker_start(self, pid, per_worker_options):
         self.logger.debug('Spawned worker %s with %r', pid, per_worker_options)
diff --git a/swift/common/linkat.py b/swift/common/linkat.py
index b81ab63058..d36411a0d6 100644
--- a/swift/common/linkat.py
+++ b/swift/common/linkat.py
@@ -17,6 +17,8 @@ import os
 import ctypes
 from ctypes.util import find_library
 
+import six
+
 __all__ = ['linkat']
 
 
@@ -70,6 +72,11 @@ class Linkat(object):
         if not isinstance(olddirfd, int) or not isinstance(newdirfd, int):
             raise TypeError("fd must be an integer.")
 
+        if isinstance(oldpath, six.text_type):
+            oldpath = oldpath.encode('utf8')
+        if isinstance(newpath, six.text_type):
+            newpath = newpath.encode('utf8')
+
         return self._c_linkat(olddirfd, oldpath, newdirfd, newpath, flags)
 
 linkat = Linkat()
diff --git a/swift/common/ring/builder.py b/swift/common/ring/builder.py
index dfb3f01150..37183f390c 100644
--- a/swift/common/ring/builder.py
+++ b/swift/common/ring/builder.py
@@ -696,7 +696,7 @@ class RingBuilder(object):
                     (dev['id'], dev['port']))
 
         int_replicas = int(math.ceil(self.replicas))
-        rep2part_len = map(len, self._replica2part2dev)
+        rep2part_len = list(map(len, self._replica2part2dev))
         # check the assignments of each part's replicas
         for part in range(self.parts):
             devs_for_part = []
@@ -932,7 +932,7 @@ class RingBuilder(object):
         more recently than min_part_hours.
         """
         self._part_moved_bitmap = bytearray(max(2 ** (self.part_power - 3), 1))
-        elapsed_hours = int(time() - self._last_part_moves_epoch) / 3600
+        elapsed_hours = int(time() - self._last_part_moves_epoch) // 3600
         if elapsed_hours <= 0:
             return
         for part in range(self.parts):
@@ -1182,7 +1182,7 @@ class RingBuilder(object):
         """
         # pick a random starting point on the other side of the ring
         quarter_turn = (self.parts // 4)
-        random_half = random.randint(0, self.parts / 2)
+        random_half = random.randint(0, self.parts // 2)
         start = (self._last_part_gather_start + quarter_turn +
                  random_half) % self.parts
         self.logger.debug('Gather start is %(start)s '
diff --git a/swift/common/ring/composite_builder.py b/swift/common/ring/composite_builder.py
index 6cdb9e0c62..4842917624 100644
--- a/swift/common/ring/composite_builder.py
+++ b/swift/common/ring/composite_builder.py
@@ -455,7 +455,7 @@ class CompositeRingBuilder(object):
                             metadata
         """
         try:
-            with open(path_to_file, 'rb') as fp:
+            with open(path_to_file, 'rt') as fp:
                 metadata = json.load(fp)
             builder_files = [metadata['component_builder_files'][comp['id']]
                              for comp in metadata['components']]
@@ -494,7 +494,7 @@ class CompositeRingBuilder(object):
         if not self.components or not self._builder_files:
             raise ValueError("No composed ring to save.")
         # persist relative paths to builder files
-        with open(path_to_file, 'wb') as fp:
+        with open(path_to_file, 'wt') as fp:
             metadata = self.to_dict()
             # future-proofing:
             # - saving abs path to component builder files and this file should
@@ -640,7 +640,7 @@ class CompositeRingBuilder(object):
         """
         self._load_components()
         self.update_last_part_moves()
-        component_builders = zip(self._builder_files, self._builders)
+        component_builders = list(zip(self._builder_files, self._builders))
         # don't let the same builder go first each time
         shuffle(component_builders)
         results = {}
diff --git a/swift/common/ring/ring.py b/swift/common/ring/ring.py
index 08f47c7ae9..fc63f041ee 100644
--- a/swift/common/ring/ring.py
+++ b/swift/common/ring/ring.py
@@ -78,7 +78,7 @@ class RingData(object):
         """
 
         json_len, = struct.unpack('!I', gz_file.read(4))
-        ring_dict = json.loads(gz_file.read(json_len))
+        ring_dict = json.loads(gz_file.read(json_len).decode('ascii'))
         ring_dict['replica2part2dev_id'] = []
 
         if metadata_only:
@@ -111,7 +111,7 @@ class RingData(object):
 
         # See if the file is in the new format
         magic = gz_file.read(4)
-        if magic == 'R1NG':
+        if magic == b'R1NG':
             format_version, = struct.unpack('!H', gz_file.read(2))
             if format_version == 1:
                 ring_data = cls.deserialize_v1(
@@ -132,7 +132,7 @@ class RingData(object):
 
     def serialize_v1(self, file_obj):
         # Write out new-style serialization magic and version:
-        file_obj.write(struct.pack('!4sH', 'R1NG', 1))
+        file_obj.write(struct.pack('!4sH', b'R1NG', 1))
         ring = self.to_dict()
 
         # Only include next_part_power if it is set in the
@@ -145,8 +145,8 @@ class RingData(object):
         if next_part_power is not None:
             _text['next_part_power'] = next_part_power
 
-        json_encoder = json.JSONEncoder(sort_keys=True)
-        json_text = json_encoder.encode(_text)
+        json_text = json.dumps(_text, sort_keys=True,
+                               ensure_ascii=True).encode('ascii')
         json_len = len(json_text)
         file_obj.write(struct.pack('!I', json_len))
         file_obj.write(json_text)
@@ -418,8 +418,8 @@ class Ring(object):
             (d['region'], d['zone'], d['ip']) for d in primary_nodes)
 
         parts = len(self._replica2part2dev_id[0])
-        start = struct.unpack_from(
-            '>I', md5(str(part)).digest())[0] >> self._part_shift
+        part_hash = md5(str(part).encode('ascii')).digest()
+        start = struct.unpack_from('>I', part_hash)[0] >> self._part_shift
         inc = int(parts / 65536) or 1
         # Multiple loops for execution speed; the checks and bookkeeping get
         # simpler as you go along
diff --git a/swift/common/swob.py b/swift/common/swob.py
index 08726a28db..db27836ac6 100644
--- a/swift/common/swob.py
+++ b/swift/common/swob.py
@@ -843,11 +843,13 @@ class Request(object):
                            'https': 443}.get(parsed_path.scheme, 80)
         if parsed_path.scheme and parsed_path.scheme not in ['http', 'https']:
             raise TypeError('Invalid scheme: %s' % parsed_path.scheme)
+        path_info = urllib.parse.unquote(
+            parsed_path.path.decode('utf8') if six.PY3 else parsed_path.path)
         env = {
             'REQUEST_METHOD': 'GET',
             'SCRIPT_NAME': '',
             'QUERY_STRING': parsed_path.query,
-            'PATH_INFO': urllib.parse.unquote(parsed_path.path),
+            'PATH_INFO': path_info,
             'SERVER_NAME': server_name,
             'SERVER_PORT': str(server_port),
             'HTTP_HOST': '%s:%d' % (server_name, server_port),
diff --git a/swift/common/utils.py b/swift/common/utils.py
index 31498e3963..8209e71898 100644
--- a/swift/common/utils.py
+++ b/swift/common/utils.py
@@ -65,6 +65,9 @@ import codecs
 utf8_decoder = codecs.getdecoder('utf-8')
 utf8_encoder = codecs.getencoder('utf-8')
 import six
+if not six.PY2:
+    utf16_decoder = codecs.getdecoder('utf-16')
+    utf16_encoder = codecs.getencoder('utf-16')
 from six.moves import cPickle as pickle
 from six.moves.configparser import (ConfigParser, NoSectionError,
                                     NoOptionError, RawConfigParser)
@@ -161,8 +164,8 @@ def IOPRIO_PRIO_VALUE(class_, data):
 # Used by hash_path to offer a bit more security when generating hashes for
 # paths. It simply appends this value to all paths; guessing the hash a path
 # will end up with would also require knowing this suffix.
-HASH_PATH_SUFFIX = ''
-HASH_PATH_PREFIX = ''
+HASH_PATH_SUFFIX = b''
+HASH_PATH_PREFIX = b''
 
 SWIFT_CONF_FILE = '/etc/swift/swift.conf'
 
@@ -215,17 +218,29 @@ def validate_hash_conf():
     global HASH_PATH_PREFIX
     if not HASH_PATH_SUFFIX and not HASH_PATH_PREFIX:
         hash_conf = ConfigParser()
-        if hash_conf.read(SWIFT_CONF_FILE):
+
+        if six.PY3:
+            # Use Latin1 to accept arbitrary bytes in the hash prefix/suffix
+            confs_read = hash_conf.read(SWIFT_CONF_FILE, encoding='latin1')
+        else:
+            confs_read = hash_conf.read(SWIFT_CONF_FILE)
+
+        if confs_read:
             try:
                 HASH_PATH_SUFFIX = hash_conf.get('swift-hash',
                                                  'swift_hash_path_suffix')
+                if six.PY3:
+                    HASH_PATH_SUFFIX = HASH_PATH_SUFFIX.encode('latin1')
             except (NoSectionError, NoOptionError):
                 pass
             try:
                 HASH_PATH_PREFIX = hash_conf.get('swift-hash',
                                                  'swift_hash_path_prefix')
+                if six.PY3:
+                    HASH_PATH_PREFIX = HASH_PATH_PREFIX.encode('latin1')
             except (NoSectionError, NoOptionError):
                 pass
+
         if not HASH_PATH_SUFFIX and not HASH_PATH_PREFIX:
             raise InvalidHashPathConfigError()
 
@@ -253,9 +268,13 @@ def get_hmac(request_method, path, expires, key, digest=sha1):
     :returns: hexdigest str of the HMAC for the request using the specified
               digest algorithm.
     """
+    parts = (request_method, str(expires), path)
+    if not isinstance(key, six.binary_type):
+        key = key.encode('utf8')
     return hmac.new(
-        key,
-        '%s\n%s\n%s' % (request_method, expires, path),
+        key, b'\n'.join(
+            x if isinstance(x, six.binary_type) else x.encode('utf8')
+            for x in parts),
         digest).hexdigest()
 
 
@@ -381,13 +400,13 @@ def config_positive_int_value(value):
     integer > 0. (not including zero) Raises ValueError otherwise.
     """
     try:
-        value = int(value)
-        if value < 1:
+        result = int(value)
+        if result < 1:
             raise ValueError()
     except (TypeError, ValueError):
         raise ValueError(
             'Config option must be an positive int number, not "%s".' % value)
-    return value
+    return result
 
 
 def config_auto_int_value(value, default):
@@ -530,7 +549,7 @@ def load_libc_function(func_name, log_error=True,
 
 def generate_trans_id(trans_id_suffix):
     return 'tx%s-%010x%s' % (
-        uuid.uuid4().hex[:21], time.time(), quote(trans_id_suffix))
+        uuid.uuid4().hex[:21], int(time.time()), quote(trans_id_suffix))
 
 
 def get_policy_index(req_headers, res_headers):
@@ -545,6 +564,8 @@ def get_policy_index(req_headers, res_headers):
     """
     header = 'X-Backend-Storage-Policy-Index'
     policy_index = res_headers.get(header, req_headers.get(header))
+    if isinstance(policy_index, six.binary_type) and not six.PY2:
+        policy_index = policy_index.decode('ascii')
     return str(policy_index) if policy_index is not None else None
 
 
@@ -752,7 +773,7 @@ class FallocateWrapper(object):
                 if float(free) <= float(FALLOCATE_RESERVE):
                     raise OSError(
                         errno.ENOSPC,
-                        'FALLOCATE_RESERVE fail %s <= %s' %
+                        'FALLOCATE_RESERVE fail %g <= %g' %
                         (free, FALLOCATE_RESERVE))
         args = {
             'fallocate': (fd, mode, offset, length),
@@ -2274,16 +2295,19 @@ def hash_path(account, container=None, object=None, raw_digest=False):
     """
     if object and not container:
         raise ValueError('container is required if object is provided')
-    paths = [account]
+    paths = [account if isinstance(account, six.binary_type)
+             else account.encode('utf8')]
     if container:
-        paths.append(container)
+        paths.append(container if isinstance(container, six.binary_type)
+                     else container.encode('utf8'))
     if object:
-        paths.append(object)
+        paths.append(object if isinstance(object, six.binary_type)
+                     else object.encode('utf8'))
     if raw_digest:
-        return md5(HASH_PATH_PREFIX + '/' + '/'.join(paths)
+        return md5(HASH_PATH_PREFIX + b'/' + b'/'.join(paths)
                    + HASH_PATH_SUFFIX).digest()
     else:
-        return md5(HASH_PATH_PREFIX + '/' + '/'.join(paths)
+        return md5(HASH_PATH_PREFIX + b'/' + b'/'.join(paths)
                    + HASH_PATH_SUFFIX).hexdigest()
 
 
@@ -2391,9 +2415,9 @@ def lock_file(filename, timeout=10, append=False, unlink=True):
     flags = os.O_CREAT | os.O_RDWR
     if append:
         flags |= os.O_APPEND
-        mode = 'a+'
+        mode = 'a+b'
     else:
-        mode = 'r+'
+        mode = 'r+b'
     while True:
         fd = os.open(filename, flags)
         file_obj = os.fdopen(fd, mode)
@@ -3214,7 +3238,7 @@ def dump_recon_cache(cache_dict, cache_file, logger, lock_timeout=2,
             try:
                 existing_entry = cf.readline()
                 if existing_entry:
-                    cache_entry = json.loads(existing_entry)
+                    cache_entry = json.loads(existing_entry.decode('utf8'))
             except ValueError:
                 # file doesn't have a valid entry, we'll recreate it
                 pass
@@ -3224,7 +3248,9 @@ def dump_recon_cache(cache_dict, cache_file, logger, lock_timeout=2,
             try:
                 with NamedTemporaryFile(dir=os.path.dirname(cache_file),
                                         delete=False) as tf:
-                    tf.write(json.dumps(cache_entry, sort_keys=True) + '\n')
+                    cache_data = json.dumps(cache_entry, ensure_ascii=True,
+                                            sort_keys=True)
+                    tf.write(cache_data.encode('ascii') + b'\n')
                 if set_owner:
                     os.chown(tf.name, pwd.getpwnam(set_owner).pw_uid, -1)
                 renamer(tf.name, cache_file, fsync=False)
@@ -3372,10 +3398,22 @@ def get_valid_utf8_str(str_or_unicode):
 
     :param str_or_unicode: a string or an unicode which can be invalid utf-8
     """
-    if isinstance(str_or_unicode, six.text_type):
-        (str_or_unicode, _len) = utf8_encoder(str_or_unicode, 'replace')
-    (valid_utf8_str, _len) = utf8_decoder(str_or_unicode, 'replace')
-    return valid_utf8_str.encode('utf-8')
+    if six.PY2:
+        if isinstance(str_or_unicode, six.text_type):
+            (str_or_unicode, _len) = utf8_encoder(str_or_unicode, 'replace')
+        (valid_unicode_str, _len) = utf8_decoder(str_or_unicode, 'replace')
+    else:
+        # Apparently under py3 we need to go to utf-16 to collapse surrogates?
+        if isinstance(str_or_unicode, six.binary_type):
+            try:
+                (str_or_unicode, _len) = utf8_decoder(str_or_unicode,
+                                                      'surrogatepass')
+            except UnicodeDecodeError:
+                (str_or_unicode, _len) = utf8_decoder(str_or_unicode,
+                                                      'replace')
+        (str_or_unicode, _len) = utf16_encoder(str_or_unicode, 'surrogatepass')
+        (valid_unicode_str, _len) = utf16_decoder(str_or_unicode, 'replace')
+    return valid_unicode_str.encode('utf-8')
 
 
 def list_from_csv(comma_separated_str):
@@ -3832,7 +3870,10 @@ def quote(value, safe='/'):
     """
     Patched version of urllib.quote that encodes utf-8 strings before quoting
     """
-    return _quote(get_valid_utf8_str(value), safe)
+    quoted = _quote(get_valid_utf8_str(value), safe)
+    if isinstance(value, six.binary_type):
+        quoted = quoted.encode('utf-8')
+    return quoted
 
 
 def get_expirer_container(x_delete_at, expirer_divisor, acc, cont, obj):
@@ -3937,11 +3978,11 @@ def iter_multipart_mime_documents(wsgi_input, boundary, read_chunk_size=4096):
     :returns: A generator of file-like objects for each part.
     :raises MimeInvalid: if the document is malformed
     """
-    boundary = '--' + boundary
+    boundary = b'--' + boundary
     blen = len(boundary) + 2  # \r\n
     try:
         got = wsgi_input.readline(blen)
-        while got == '\r\n':
+        while got == b'\r\n':
             got = wsgi_input.readline(blen)
     except (IOError, ValueError) as e:
         raise swift.common.exceptions.ChunkReadError(str(e))
@@ -3949,8 +3990,8 @@ def iter_multipart_mime_documents(wsgi_input, boundary, read_chunk_size=4096):
     if got.strip() != boundary:
         raise swift.common.exceptions.MimeInvalid(
             'invalid starting boundary: wanted %r, got %r', (boundary, got))
-    boundary = '\r\n' + boundary
-    input_buffer = ''
+    boundary = b'\r\n' + boundary
+    input_buffer = b''
     done = False
     while not done:
         it = _MultipartMimeFileLikeObject(wsgi_input, boundary, input_buffer,
@@ -4361,7 +4402,12 @@ def strict_b64decode(value, allow_line_breaks=False):
     :raises ValueError: if ``value`` is not a string, contains invalid
                         characters, or has insufficient padding
     '''
-    if not isinstance(value, six.string_types):
+    if isinstance(value, bytes):
+        try:
+            value = value.decode('ascii')
+        except UnicodeDecodeError:
+            raise ValueError
+    if not isinstance(value, six.text_type):
         raise ValueError
     # b64decode will silently discard bad characters, but we want to
     # treat them as an error
@@ -4390,7 +4436,7 @@ def md5_hash_for_file(fname):
     """
     with open(fname, 'rb') as f:
         md5sum = md5()
-        for block in iter(lambda: f.read(MD5_BLOCK_READ_BYTES), ''):
+        for block in iter(lambda: f.read(MD5_BLOCK_READ_BYTES), b''):
             md5sum.update(block)
     return md5sum.hexdigest()
 
diff --git a/test/unit/__init__.py b/test/unit/__init__.py
index ca7918b225..a7c9d25965 100644
--- a/test/unit/__init__.py
+++ b/test/unit/__init__.py
@@ -71,7 +71,7 @@ EMPTY_ETAG = md5().hexdigest()
 # try not to import this module from swift
 if not os.path.basename(sys.argv[0]).startswith('swift'):
     # never patch HASH_PATH_SUFFIX AGAIN!
-    utils.HASH_PATH_SUFFIX = 'endcap'
+    utils.HASH_PATH_SUFFIX = b'endcap'
 
 
 EC_TYPE_PREFERENCE = [
diff --git a/test/unit/cli/test_ringbuilder.py b/test/unit/cli/test_ringbuilder.py
index 0efac59911..65a6cf72ef 100644
--- a/test/unit/cli/test_ringbuilder.py
+++ b/test/unit/cli/test_ringbuilder.py
@@ -34,6 +34,11 @@ from swift.common.ring import RingBuilder
 
 from test.unit import Timeout
 
+try:
+    from itertools import zip_longest
+except ImportError:
+    from itertools import izip_longest as zip_longest
+
 
 class RunSwiftRingBuilderMixin(object):
 
@@ -115,8 +120,7 @@ class TestCommands(unittest.TestCase, RunSwiftRingBuilderMixin):
         output = output.replace(self.tempfile, '__RINGFILE__')
         stub = stub.replace('__BUILDER_ID__', builder_id)
         for i, (value, expected) in enumerate(
-                itertools.izip_longest(
-                    output.splitlines(), stub.splitlines())):
+                zip_longest(output.splitlines(), stub.splitlines())):
             # N.B. differences in trailing whitespace are ignored!
             value = (value or '').rstrip()
             expected = (expected or '').rstrip()
diff --git a/test/unit/common/ring/test_builder.py b/test/unit/common/ring/test_builder.py
index 778b45e413..3a6a2cc145 100644
--- a/test/unit/common/ring/test_builder.py
+++ b/test/unit/common/ring/test_builder.py
@@ -25,6 +25,7 @@ from collections import Counter, defaultdict
 from math import ceil
 from tempfile import mkdtemp
 from shutil import rmtree
+import sys
 import random
 import uuid
 import itertools
@@ -649,7 +650,7 @@ class TestRingBuilder(unittest.TestCase):
 
             self.assertEqual({0: 2, 1: 2, 2: 2}, dict(counts['zone']))
             # each part is assigned once to six unique devices
-            self.assertEqual((counts['dev_id'].values()), [1] * 6)
+            self.assertEqual(list(counts['dev_id'].values()), [1] * 6)
             self.assertEqual(len(set(counts['dev_id'].keys())), 6)
 
     def test_multitier_part_moves_with_0_min_part_hours(self):
@@ -2114,7 +2115,7 @@ class TestRingBuilder(unittest.TestCase):
             with self.assertRaises(AttributeError) as cm:
                 rb.id
             self.assertIn('id attribute has not been initialised',
-                          cm.exception.message)
+                          cm.exception.args[0])
 
         builder_file = os.path.join(self.testdir, 'test_save.builder')
         orig_rb.save(builder_file)
@@ -2131,7 +2132,7 @@ class TestRingBuilder(unittest.TestCase):
             with self.assertRaises(AttributeError) as cm:
                 loaded_rb.id
             self.assertIn('id attribute has not been initialised',
-                          cm.exception.message)
+                          cm.exception.args[0])
 
             # check saving assigns an id, and that it is persisted
             loaded_rb.save(builder_file)
@@ -2169,7 +2170,7 @@ class TestRingBuilder(unittest.TestCase):
         with self.assertRaises(AttributeError) as cm:
             rb.id
         self.assertIn('id attribute has not been initialised',
-                      cm.exception.message)
+                      cm.exception.args[0])
         # save must succeed for id to be assigned
         with self.assertRaises(IOError):
             rb.save(os.path.join(
@@ -2177,7 +2178,7 @@ class TestRingBuilder(unittest.TestCase):
         with self.assertRaises(AttributeError) as cm:
             rb.id
         self.assertIn('id attribute has not been initialised',
-                      cm.exception.message)
+                      cm.exception.args[0])
 
     def test_search_devs(self):
         rb = ring.RingBuilder(8, 3, 1)
@@ -2480,6 +2481,8 @@ class TestRingBuilder(unittest.TestCase):
             (0, 0, '127.0.0.1', 3): [0, 256, 0, 0],
         })
 
+    @unittest.skipIf(sys.version_info >= (3,),
+                     "Seed-specific tests don't work well on py3")
     def test_undispersable_zone_converge_on_balance(self):
         rb = ring.RingBuilder(8, 6, 0)
         dev_id = 0
@@ -2535,6 +2538,8 @@ class TestRingBuilder(unittest.TestCase):
         self.assertEqual(rb.get_balance(), 0.390625)
         self.assertEqual(rb.dispersion, 16.6015625)
 
+    @unittest.skipIf(sys.version_info >= (3,),
+                     "Seed-specific tests don't work well on py3")
     def test_undispersable_server_converge_on_balance(self):
         rb = ring.RingBuilder(8, 6, 0)
         dev_id = 0
diff --git a/test/unit/common/ring/test_composite_builder.py b/test/unit/common/ring/test_composite_builder.py
index 9e952611f5..3cf2de28f7 100644
--- a/test/unit/common/ring/test_composite_builder.py
+++ b/test/unit/common/ring/test_composite_builder.py
@@ -230,7 +230,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
         with self.assertRaises(ValueError) as cm:
             compose_rings(builders)
         self.assertIn('Same region found in different rings',
-                      cm.exception.message)
+                      cm.exception.args[0])
 
     def test_composite_only_one_ring_in_the_args_error(self):
         builders = self.create_sample_ringbuilders(1)
@@ -238,7 +238,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
             compose_rings(builders)
         self.assertIn(
             'Two or more component builders are required.',
-            cm.exception.message)
+            cm.exception.args[0])
 
     def test_composite_same_device_in_the_different_rings_error(self):
         builders = self.create_sample_ringbuilders(2)
@@ -267,7 +267,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
         self.assertIn(
             'Duplicate ip/port/device combination %(ip)s/%(port)s/%(device)s '
             'found in builders at indexes 0 and 2' %
-            same_device, cm.exception.message)
+            same_device, cm.exception.args[0])
 
     def test_different_part_power_error(self):
         # create a ring builder
@@ -296,7 +296,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
         with self.assertRaises(ValueError) as cm:
             compose_rings(builders)
         self.assertIn("All builders must have same value for 'part_power'",
-                      cm.exception.message)
+                      cm.exception.args[0])
 
     def test_compose_rings_float_replica_count_builder_error(self):
         builders = self.create_sample_ringbuilders(1)
@@ -322,8 +322,8 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
 
         with self.assertRaises(ValueError) as cm:
             compose_rings(builders)
-        self.assertIn("Problem with builders", cm.exception.message)
-        self.assertIn("Non integer replica count", cm.exception.message)
+        self.assertIn("Problem with builders", cm.exception.args[0])
+        self.assertIn("Non integer replica count", cm.exception.args[0])
 
     def test_compose_rings_rebalance_needed(self):
         builders = self.create_sample_ringbuilders(2)
@@ -334,8 +334,8 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
         self.assertTrue(builders[1].devs_changed)  # sanity check
         with self.assertRaises(ValueError) as cm:
             compose_rings(builders)
-        self.assertIn("Problem with builders", cm.exception.message)
-        self.assertIn("Builder needs rebalance", cm.exception.message)
+        self.assertIn("Problem with builders", cm.exception.args[0])
+        self.assertIn("Builder needs rebalance", cm.exception.args[0])
         # after rebalance, that works (sanity)
         builders[1].rebalance()
         compose_rings(builders)
@@ -367,7 +367,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
 
     def test_ring_swap(self):
         # sanity
-        builders = sorted(self.create_sample_ringbuilders(2))
+        builders = self.create_sample_ringbuilders(2)
         rd = compose_rings(builders)
         rd.save(self.output_ring)
         got_ring = Ring(self.output_ring)
@@ -377,7 +377,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
         self.assertDevices(got_ring, builders)
 
         # even if swapped, it works
-        reverse_builders = sorted(builders, reverse=True)
+        reverse_builders = builders[::-1]
         self.assertNotEqual(reverse_builders, builders)
         rd = compose_rings(reverse_builders)
         rd.save(self.output_ring)
@@ -396,7 +396,7 @@ class TestCompositeBuilder(BaseTestCompositeBuilder):
             self.assertDevices(got_ring, builders)
 
         self.assertIn("composite ring is not ordered by ring order",
-                      cm.exception.message)
+                      cm.exception.args[0])
 
 
 class TestCompositeRingBuilder(BaseTestCompositeBuilder):
@@ -429,7 +429,7 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
         with self.assertRaises(ValueError) as cm:
             cb.compose(require_modified=True)
         self.assertIn('None of the component builders has been modified',
-                      cm.exception.message)
+                      cm.exception.args[0])
         self.assertEqual(1, cb.version)
         # ...but by default will compose again despite no changes to components
         cb.compose(force=True).save(self.output_ring)
@@ -530,12 +530,12 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
                     CompositeRingBuilder.load(bad_file)
                 self.assertIn(
                     "File does not contain valid composite ring data",
-                    cm.exception.message)
+                    cm.exception.args[0])
             except AssertionError as err:
                 raise AssertionError('With content %r: %s' % (content, err))
 
         for content in ('', 'not json', json.dumps({}), json.dumps([])):
-            check_bad_content(content)
+            check_bad_content(content.encode('ascii'))
 
         good_content = {
             'components': [
@@ -548,7 +548,7 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
         for missing in good_content:
             bad_content = dict(good_content)
             bad_content.pop(missing)
-            check_bad_content(json.dumps(bad_content))
+            check_bad_content(json.dumps(bad_content).encode('ascii'))
 
     def test_save_errors(self):
         cb_file = os.path.join(self.tmpdir, 'test-composite-ring.json')
@@ -556,7 +556,7 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
         def do_test(cb):
             with self.assertRaises(ValueError) as cm:
                 cb.save(cb_file)
-            self.assertIn("No composed ring to save", cm.exception.message)
+            self.assertIn("No composed ring to save", cm.exception.args[0])
 
         do_test(CompositeRingBuilder())
         do_test(CompositeRingBuilder([]))
@@ -635,7 +635,7 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
         with self.assertRaises(ValueError) as cm:
             cb.rebalance()
         self.assertIn('Two or more component builders are required',
-                      cm.exception.message)
+                      cm.exception.args[0])
 
         builders = self.create_sample_ringbuilders(2)
         cb, builder_files = self._make_composite_builder(builders)
@@ -668,7 +668,7 @@ class TestCompositeRingBuilder(BaseTestCompositeBuilder):
         # sanity, it is impossible to compose un-rebalanced component rings
         with self.assertRaises(ValueError) as cm:
             cb.compose()
-        self.assertIn("Builder needs rebalance", cm.exception.message)
+        self.assertIn("Builder needs rebalance", cm.exception.args[0])
         # but ok to compose after rebalance
         cb.rebalance()
         rd = cb.compose()
@@ -727,14 +727,14 @@ class TestLoadComponents(BaseTestCompositeBuilder):
                 self._call_method_under_test(cb, builder_files,
                                              force=force)
             self.assertIn('Two or more component builders are required',
-                          cm.exception.message)
+                          cm.exception.args[0])
 
             cb = CompositeRingBuilder()
             with self.assertRaises(ValueError) as cm:
                 self._call_method_under_test(cb, builder_files,
                                              force=force)
             self.assertIn('Two or more component builders are required',
-                          cm.exception.message)
+                          cm.exception.args[0])
 
         builders = self.create_sample_ringbuilders(3)
         builder_files = self.save_builders(builders)
@@ -755,7 +755,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
                 with self.assertRaises(ValueError) as cm:
                     self._call_method_under_test(cb, builder_files,
                                                  force=force)
-                error_lines = cm.exception.message.split('\n')
+                error_lines = cm.exception.args[0].split('\n')
                 self.assertIn("Problem with builder at index %s" % no_id,
                               error_lines[0])
                 self.assertIn("id attribute has not been initialised",
@@ -785,7 +785,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         def do_check(force):
             with self.assertRaises(ValueError) as cm:
                 self._call_method_under_test(cb, force=force)
-            error_lines = cm.exception.message.split('\n')
+            error_lines = cm.exception.args[0].split('\n')
             self.assertIn("Builder id %r used at indexes 0, 2" %
                           builders[0].id, error_lines[0])
             self.assertFalse(error_lines[1:])
@@ -799,7 +799,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
             orig_version = cb.version
             with self.assertRaises(ValueError) as cm:
                 self._call_method_under_test(cb, builder_files, **kwargs)
-            error_lines = cm.exception.message.split('\n')
+            error_lines = cm.exception.args[0].split('\n')
             self.assertIn("None of the component builders has been modified",
                           error_lines[0])
             self.assertFalse(error_lines[1:])
@@ -839,7 +839,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         self.save_builders([old_builders[0], builders[1]])
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         self.assertIn("Invalid builder change at index 0", error_lines[0])
         self.assertIn("Older builder version", error_lines[0])
         self.assertFalse(error_lines[1:])
@@ -849,7 +849,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         self.save_builders([old_builders[0], builders[1]])
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         self.assertIn("Invalid builder change at index 0", error_lines[0])
         self.assertIn("Older builder version", error_lines[0])
         self.assertFalse(error_lines[1:])
@@ -869,7 +869,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
             with self.assertRaises(ValueError) as cm:
                 self._call_method_under_test(
                     cb, self.save_builders(bad_builders))
-            error_lines = cm.exception.message.split('\n')
+            error_lines = cm.exception.args[0].split('\n')
             self.assertFalse(error_lines[1:])
             self.assertEqual(1, cb.version)
             # unless we ignore errors
@@ -892,7 +892,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         different_files = self.save_builders([builders[0], builders[2]])
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb, different_files)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         self.assertIn("Invalid builder change at index 1", error_lines[0])
         self.assertIn("Attribute mismatch for id", error_lines[0])
         self.assertFalse(error_lines[1:])
@@ -908,7 +908,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         builder_files.reverse()
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb, builder_files)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         for i, line in enumerate(error_lines):
             self.assertIn("Invalid builder change at index %s" % i, line)
             self.assertIn("Attribute mismatch for id", line)
@@ -925,7 +925,7 @@ class TestLoadComponents(BaseTestCompositeBuilder):
         self.save_builders(builders)
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         for i, line in enumerate(error_lines):
             self.assertIn("Invalid builder change at index 0", line)
             self.assertIn("Attribute mismatch for replicas", line)
@@ -949,7 +949,7 @@ class TestComposeLoadComponents(TestLoadComponents):
         self.save_builders(builders)
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         for i, line in enumerate(error_lines):
             self.assertIn("Invalid builder change at index 0", line)
             self.assertIn("Attribute mismatch for replicas", line)
@@ -958,7 +958,7 @@ class TestComposeLoadComponents(TestLoadComponents):
         # validate will fail because the builder needs rebalancing
         with self.assertRaises(ValueError) as cm:
             self._call_method_under_test(cb, force=True)
-        error_lines = cm.exception.message.split('\n')
+        error_lines = cm.exception.args[0].split('\n')
         self.assertIn("Problem with builders", error_lines[0])
         self.assertIn("Builder needs rebalance", error_lines[1])
         self.assertFalse(error_lines[2:])
@@ -976,17 +976,18 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         if rebalance:
             rb.rebalance()
             self.assertEqual(self._partition_counts(rb),
-                             {0: 256, 1: 256, 2: 256})  # sanity check
+                             [256, 256, 256])  # sanity check
         return rb
 
     def _partition_counts(self, builder):
         """
-        Returns a dictionary mapping device id's to (number of
+        Returns an array mapping device id's to (number of
         partitions assigned to that device).
         """
-        return Counter(builder.devs[dev_id]['id']
-                       for part2dev_id in builder._replica2part2dev
-                       for dev_id in part2dev_id)
+        c = Counter(builder.devs[dev_id]['id']
+                    for part2dev_id in builder._replica2part2dev
+                    for dev_id in part2dev_id)
+        return [c[d['id']] for d in builder.devs]
 
     def get_moved_parts(self, after, before):
         def uniqueness(dev):
@@ -1020,7 +1021,7 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
 
         # all cobuilders can perform initial rebalance
         cb.rebalance()
-        exp = {0: 256, 1: 256, 2: 256}
+        exp = [256, 256, 256]
         self.assertEqual(exp, self._partition_counts(builders[0]))
         self.assertEqual(exp, self._partition_counts(builders[1]))
         self.assertEqual(exp, self._partition_counts(builders[2]))
@@ -1057,13 +1058,13 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         rb1_parts_moved = self.get_moved_parts(builders[0], old_builders[0])
         self.assertEqual(192, len(rb1_parts_moved))
         self.assertEqual(self._partition_counts(builders[0]),
-                         {0: 192, 1: 192, 2: 192, 3: 192})
+                         [192, 192, 192, 192])
 
         rb2_parts_moved = self.get_moved_parts(builders[1], old_builders[1])
         self.assertEqual(64, len(rb2_parts_moved))
         counts = self._partition_counts(builders[1])
         self.assertEqual(counts[3], 64)
-        self.assertEqual([234, 235, 235], sorted(counts.values()[:3]))
+        self.assertEqual([234, 235, 235], sorted(counts[:3]))
         self.assertFalse(rb2_parts_moved.intersection(rb1_parts_moved))
 
         # rb3 can't rebalance - all parts moved while rebalancing rb1 and rb2
@@ -1191,7 +1192,7 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         rb1_parts_moved = self.get_moved_parts(rb1s[1], rb1s[0])
         self.assertEqual(192, len(rb1_parts_moved))
         self.assertEqual(self._partition_counts(rb1s[1]),
-                         {0: 192, 1: 192, 2: 192, 3: 192})
+                         [192, 192, 192, 192])
 
         # rebalancing rb2 - rb2 in isolation could potentially move all parts
         # so would move 192 parts to new device, but it is constrained by rb1
@@ -1200,7 +1201,7 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         self.assertEqual(64, len(rb2_parts_moved))
         counts = self._partition_counts(rb2s[3])
         self.assertEqual(counts[3], 64)
-        self.assertEqual([234, 235, 235], sorted(counts.values()[:3]))
+        self.assertEqual([234, 235, 235], sorted(counts[:3]))
         self.assertFalse(rb2_parts_moved.intersection(rb1_parts_moved))
         self.assertEqual(192, self.num_parts_can_move(rb2s[3]))
         self.assertEqual(64, self.num_parts_can_move(rb1s[3]))
@@ -1255,7 +1256,7 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         # rebalance - after that expect no more updates
         with mock_update_last_part_moves() as update_calls:
             cb.update_last_part_moves()
-        self.assertEqual(sorted([rb1, rb2]), sorted(update_calls))
+        self.assertEqual({rb1, rb2}, set(update_calls))
 
         with mock_update_last_part_moves() as update_calls:
             with mock_can_part_move() as can_part_move_calls:
@@ -1263,14 +1264,14 @@ class TestCooperativeRingBuilder(BaseTestCompositeBuilder):
         self.assertFalse(update_calls)
         # rb1 has never been rebalanced so no calls propagate from its
         # can_part_move method to its superclass _can_part_move method
-        self.assertEqual([rb2], can_part_move_calls.keys())
+        self.assertEqual({rb2}, set(can_part_move_calls))
 
         with mock_update_last_part_moves() as update_calls:
             with mock_can_part_move() as can_part_move_calls:
                 rb1.rebalance()
         self.assertFalse(update_calls)
         # rb1 is being rebalanced so gets checked, and rb2 also gets checked
-        self.assertEqual(sorted([rb1, rb2]), sorted(can_part_move_calls))
+        self.assertEqual({rb1, rb2}, set(can_part_move_calls))
         self.assertEqual(768, len(can_part_move_calls[rb1]))
         self.assertEqual(768, len(can_part_move_calls[rb2]))
 
diff --git a/test/unit/common/ring/test_ring.py b/test/unit/common/ring/test_ring.py
index 5c68328bb8..17335f582b 100644
--- a/test/unit/common/ring/test_ring.py
+++ b/test/unit/common/ring/test_ring.py
@@ -40,8 +40,8 @@ class TestRingBase(unittest.TestCase):
     def setUp(self):
         self._orig_hash_suffix = utils.HASH_PATH_SUFFIX
         self._orig_hash_prefix = utils.HASH_PATH_PREFIX
-        utils.HASH_PATH_SUFFIX = 'endcap'
-        utils.HASH_PATH_PREFIX = ''
+        utils.HASH_PATH_SUFFIX = b'endcap'
+        utils.HASH_PATH_PREFIX = b''
 
     def tearDown(self):
         utils.HASH_PATH_SUFFIX = self._orig_hash_suffix
@@ -150,8 +150,8 @@ class TestRingData(unittest.TestCase):
             [{'id': 0, 'zone': 0}, {'id': 1, 'zone': 1}], 30)
         rd.save(ring_fname1)
         rd.save(ring_fname2)
-        with open(ring_fname1) as ring1:
-            with open(ring_fname2) as ring2:
+        with open(ring_fname1, 'rb') as ring1:
+            with open(ring_fname2, 'rb') as ring2:
                 self.assertEqual(ring1.read(), ring2.read())
 
     def test_permissions(self):
@@ -160,8 +160,12 @@ class TestRingData(unittest.TestCase):
             [array.array('H', [0, 1, 0, 1]), array.array('H', [0, 1, 0, 1])],
             [{'id': 0, 'zone': 0}, {'id': 1, 'zone': 1}], 30)
         rd.save(ring_fname)
-        self.assertEqual(oct(stat.S_IMODE(os.stat(ring_fname).st_mode)),
-                         '0644')
+        ring_mode = stat.S_IMODE(os.stat(ring_fname).st_mode)
+        expected_mode = (stat.S_IRUSR | stat.S_IWUSR |
+                         stat.S_IRGRP | stat.S_IROTH)
+        self.assertEqual(
+            ring_mode, expected_mode,
+            'Ring has mode 0%o, expected 0%o' % (ring_mode, expected_mode))
 
     def test_replica_count(self):
         rd = ring.RingData(
@@ -227,8 +231,8 @@ class TestRing(TestRingBase):
         self.assertEqual(self.ring.reload_time, self.intended_reload_time)
         self.assertEqual(self.ring.serialized_path, self.testgz)
         # test invalid endcap
-        with mock.patch.object(utils, 'HASH_PATH_SUFFIX', ''), \
-                mock.patch.object(utils, 'HASH_PATH_PREFIX', ''), \
+        with mock.patch.object(utils, 'HASH_PATH_SUFFIX', b''), \
+                mock.patch.object(utils, 'HASH_PATH_PREFIX', b''), \
                 mock.patch.object(utils, 'SWIFT_CONF_FILE', ''):
             self.assertRaises(SystemExit, ring.Ring, self.testdir, 'whatever')
 
@@ -490,6 +494,8 @@ class TestRing(TestRingBase):
         self.ring.devs.append(new_dev)
         self.ring._rebuild_tier_data()
 
+    @unittest.skipIf(sys.version_info >= (3,),
+                     "Seed-specific tests don't work well on py3")
     def test_get_more_nodes(self):
         # Yes, these tests are deliberately very fragile. We want to make sure
         # that if someone changes the results the ring produces, they know it.
diff --git a/test/unit/common/ring/test_utils.py b/test/unit/common/ring/test_utils.py
index 471d3451f5..8484736894 100644
--- a/test/unit/common/ring/test_utils.py
+++ b/test/unit/common/ring/test_utils.py
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+import sys
 import unittest
 from collections import defaultdict
 
@@ -663,6 +664,8 @@ class TestUtils(unittest.TestCase):
         }
         self.assertEqual(device, expected)
 
+    @unittest.skipIf(sys.version_info >= (3,),
+                     "Seed-specific tests don't work well on py3")
     def test_dispersion_report(self):
         rb = ring.RingBuilder(8, 3, 0)
         rb.add_dev({'id': 0, 'region': 1, 'zone': 0, 'weight': 100,
diff --git a/test/unit/common/test_utils.py b/test/unit/common/test_utils.py
index 2355d984c3..9fb543f51e 100644
--- a/test/unit/common/test_utils.py
+++ b/test/unit/common/test_utils.py
@@ -921,8 +921,8 @@ class TestUtils(unittest.TestCase):
     """Tests for swift.common.utils """
 
     def setUp(self):
-        utils.HASH_PATH_SUFFIX = 'endcap'
-        utils.HASH_PATH_PREFIX = 'startcap'
+        utils.HASH_PATH_SUFFIX = b'endcap'
+        utils.HASH_PATH_PREFIX = b'startcap'
 
     def test_get_zero_indexed_base_string(self):
         self.assertEqual(utils.get_zero_indexed_base_string('something', 0),
@@ -1938,7 +1938,7 @@ class TestUtils(unittest.TestCase):
     def test_hash_path(self):
         # Yes, these tests are deliberately very fragile. We want to make sure
         # that if someones changes the results hash_path produces, they know it
-        with mock.patch('swift.common.utils.HASH_PATH_PREFIX', ''):
+        with mock.patch('swift.common.utils.HASH_PATH_PREFIX', b''):
             self.assertEqual(utils.hash_path('a'),
                              '1c84525acb02107ea475dcd3d09c2c58')
             self.assertEqual(utils.hash_path('a', 'c'),
@@ -1948,10 +1948,10 @@ class TestUtils(unittest.TestCase):
             self.assertEqual(utils.hash_path('a', 'c', 'o', raw_digest=False),
                              '06fbf0b514e5199dfc4e00f42eb5ea83')
             self.assertEqual(utils.hash_path('a', 'c', 'o', raw_digest=True),
-                             '\x06\xfb\xf0\xb5\x14\xe5\x19\x9d\xfcN'
-                             '\x00\xf4.\xb5\xea\x83')
+                             b'\x06\xfb\xf0\xb5\x14\xe5\x19\x9d\xfcN'
+                             b'\x00\xf4.\xb5\xea\x83')
             self.assertRaises(ValueError, utils.hash_path, 'a', object='o')
-            utils.HASH_PATH_PREFIX = 'abcdef'
+            utils.HASH_PATH_PREFIX = b'abcdef'
             self.assertEqual(utils.hash_path('a', 'c', 'o', raw_digest=False),
                              '363f9b535bfb7d17a43a46a358afca0e')
 
@@ -1985,8 +1985,8 @@ class TestUtils(unittest.TestCase):
     def _test_validate_hash_conf(self, sections, options, should_raise_error):
 
         class FakeConfigParser(object):
-            def read(self, conf_path):
-                return True
+            def read(self, conf_path, encoding=None):
+                return [conf_path]
 
             def get(self, section, option):
                 if section not in sections:
@@ -1996,8 +1996,8 @@ class TestUtils(unittest.TestCase):
                 else:
                     return 'some_option_value'
 
-        with mock.patch('swift.common.utils.HASH_PATH_PREFIX', ''), \
-                mock.patch('swift.common.utils.HASH_PATH_SUFFIX', ''), \
+        with mock.patch('swift.common.utils.HASH_PATH_PREFIX', b''), \
+                mock.patch('swift.common.utils.HASH_PATH_SUFFIX', b''), \
                 mock.patch('swift.common.utils.ConfigParser',
                            FakeConfigParser):
             try:
@@ -2026,7 +2026,7 @@ foo = bar
 log_name = yarr'''
         # setup a real file
         fd, temppath = tempfile.mkstemp()
-        with os.fdopen(fd, 'wb') as f:
+        with os.fdopen(fd, 'w') as f:
             f.write(conf)
         make_filename = lambda: temppath
         # setup a file stream
@@ -2075,7 +2075,7 @@ foo = bar
 log_name = %(yarr)s'''
         # setup a real file
         fd, temppath = tempfile.mkstemp()
-        with os.fdopen(fd, 'wb') as f:
+        with os.fdopen(fd, 'w') as f:
             f.write(conf)
         make_filename = lambda: temppath
         # setup a file stream
@@ -2661,18 +2661,26 @@ cluster_dfw1 = http://dfw1.host/v1/
     def test_config_positive_int_value(self):
         expectations = {
             # value : expected,
-            '1': 1,
+            u'1': 1,
+            b'1': 1,
             1: 1,
-            '2': 2,
-            '1024': 1024,
-            '0': ValueError,
-            '-1': ValueError,
-            '0x01': ValueError,
-            'asdf': ValueError,
+            u'2': 2,
+            b'2': 2,
+            u'1024': 1024,
+            b'1024': 1024,
+            u'0': ValueError,
+            b'0': ValueError,
+            u'-1': ValueError,
+            b'-1': ValueError,
+            u'0x01': ValueError,
+            b'0x01': ValueError,
+            u'asdf': ValueError,
+            b'asdf': ValueError,
             None: ValueError,
             0: ValueError,
             -1: ValueError,
-            '1.2': ValueError,  # string expresses float should be value error
+            u'1.2': ValueError,  # string expresses float should be value error
+            b'1.2': ValueError,  # string expresses float should be value error
         }
         for value, expected in expectations.items():
             try:
@@ -2683,7 +2691,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                 else:
                     self.assertEqual(
                         'Config option must be an positive int number, '
-                        'not "%s".' % value, e.message)
+                        'not "%s".' % value, e.args[0])
             else:
                 self.assertEqual(expected, rv)
 
@@ -2940,7 +2948,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                 fallocate(0, 1, 0, ctypes.c_uint64(0))
             self.assertEqual(
                 str(catcher.exception),
-                '[Errno %d] FALLOCATE_RESERVE fail 100.0 <= 100.0'
+                '[Errno %d] FALLOCATE_RESERVE fail 100 <= 100'
                 % errno.ENOSPC)
             self.assertEqual(catcher.exception.errno, errno.ENOSPC)
 
@@ -2955,7 +2963,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                 fallocate(0, 1, 0, ctypes.c_uint64(101))
             self.assertEqual(
                 str(catcher.exception),
-                '[Errno %d] FALLOCATE_RESERVE fail 0.99 <= 1.0'
+                '[Errno %d] FALLOCATE_RESERVE fail 0.99 <= 1'
                 % errno.ENOSPC)
             self.assertEqual(catcher.exception.errno, errno.ENOSPC)
 
@@ -2969,7 +2977,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                 fallocate(0, 1, 0, ctypes.c_uint64(100))
             self.assertEqual(
                 str(catcher.exception),
-                '[Errno %d] FALLOCATE_RESERVE fail 98.0 <= 98.0'
+                '[Errno %d] FALLOCATE_RESERVE fail 98 <= 98'
                 % errno.ENOSPC)
             self.assertEqual(catcher.exception.errno, errno.ENOSPC)
 
@@ -2993,7 +3001,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                 fallocate(0, 1, 0, ctypes.c_uint64(1000))
             self.assertEqual(
                 str(catcher.exception),
-                '[Errno %d] FALLOCATE_RESERVE fail 2.0 <= 2.0'
+                '[Errno %d] FALLOCATE_RESERVE fail 2 <= 2'
                 % errno.ENOSPC)
             self.assertEqual(catcher.exception.errno, errno.ENOSPC)
 
@@ -3126,11 +3134,11 @@ cluster_dfw1 = http://dfw1.host/v1/
     def test_lock_file(self):
         flags = os.O_CREAT | os.O_RDWR
         with NamedTemporaryFile(delete=False) as nt:
-            nt.write("test string")
+            nt.write(b"test string")
             nt.flush()
             nt.close()
             with utils.lock_file(nt.name, unlink=False) as f:
-                self.assertEqual(f.read(), "test string")
+                self.assertEqual(f.read(), b"test string")
                 # we have a lock, now let's try to get a newer one
                 fd = os.open(nt.name, flags)
                 self.assertRaises(IOError, fcntl.flock, fd,
@@ -3138,12 +3146,12 @@ cluster_dfw1 = http://dfw1.host/v1/
 
             with utils.lock_file(nt.name, unlink=False, append=True) as f:
                 f.seek(0)
-                self.assertEqual(f.read(), "test string")
+                self.assertEqual(f.read(), b"test string")
                 f.seek(0)
-                f.write("\nanother string")
+                f.write(b"\nanother string")
                 f.flush()
                 f.seek(0)
-                self.assertEqual(f.read(), "test string\nanother string")
+                self.assertEqual(f.read(), b"test string\nanother string")
 
                 # we have a lock, now let's try to get a newer one
                 fd = os.open(nt.name, flags)
@@ -3160,7 +3168,7 @@ cluster_dfw1 = http://dfw1.host/v1/
                     pass
 
             with utils.lock_file(nt.name, unlink=True) as f:
-                self.assertEqual(f.read(), "test string\nanother string")
+                self.assertEqual(f.read(), b"test string\nanother string")
                 # we have a lock, now let's try to get a newer one
                 fd = os.open(nt.name, flags)
                 self.assertRaises(
@@ -3482,22 +3490,28 @@ cluster_dfw1 = http://dfw1.host/v1/
         do_test(b'\xf0\x9f\x82\xa1', b'\xf0\x9f\x82\xa1'),
         do_test(b'\xed\xa0\xbc\xed\xb2\xa1', b'\xf0\x9f\x82\xa1'),
 
-    def test_quote(self):
-        res = utils.quote('/v1/a/c3/subdirx/')
-        assert res == '/v1/a/c3/subdirx/'
-        res = utils.quote('/v1/a&b/c3/subdirx/')
-        assert res == '/v1/a%26b/c3/subdirx/'
-        res = utils.quote('/v1/a&b/c3/subdirx/', safe='&')
-        assert res == '%2Fv1%2Fa&b%2Fc3%2Fsubdirx%2F'
-        unicode_sample = u'\uc77c\uc601'
-        account = 'abc_' + unicode_sample
-        valid_utf8_str = utils.get_valid_utf8_str(account)
-        account = 'abc_' + unicode_sample.encode('utf-8')[::-1]
-        invalid_utf8_str = utils.get_valid_utf8_str(account)
-        self.assertEqual('abc_%EC%9D%BC%EC%98%81',
-                         utils.quote(valid_utf8_str))
-        self.assertEqual('abc_%EF%BF%BD%EF%BF%BD%EC%BC%9D%EF%BF%BD',
-                         utils.quote(invalid_utf8_str))
+    def test_quote_bytes(self):
+        self.assertEqual(b'/v1/a/c3/subdirx/',
+                         utils.quote(b'/v1/a/c3/subdirx/'))
+        self.assertEqual(b'/v1/a%26b/c3/subdirx/',
+                         utils.quote(b'/v1/a&b/c3/subdirx/'))
+        self.assertEqual(b'%2Fv1%2Fa&b%2Fc3%2Fsubdirx%2F',
+                         utils.quote(b'/v1/a&b/c3/subdirx/', safe='&'))
+        self.assertEqual(b'abc_%EC%9D%BC%EC%98%81',
+                         utils.quote(u'abc_\uc77c\uc601'.encode('utf8')))
+        # Invalid utf8 is parsed as latin1, then re-encoded as utf8??
+        self.assertEqual(b'%EF%BF%BD%EF%BF%BD%EC%BC%9D%EF%BF%BD',
+                         utils.quote(u'\uc77c\uc601'.encode('utf8')[::-1]))
+
+    def test_quote_unicode(self):
+        self.assertEqual(u'/v1/a/c3/subdirx/',
+                         utils.quote(u'/v1/a/c3/subdirx/'))
+        self.assertEqual(u'/v1/a%26b/c3/subdirx/',
+                         utils.quote(u'/v1/a&b/c3/subdirx/'))
+        self.assertEqual(u'%2Fv1%2Fa&b%2Fc3%2Fsubdirx%2F',
+                         utils.quote(u'/v1/a&b/c3/subdirx/', safe='&'))
+        self.assertEqual(u'abc_%EC%9D%BC%EC%98%81',
+                         utils.quote(u'abc_\uc77c\uc601'))
 
     def test_get_hmac(self):
         self.assertEqual(
@@ -3797,7 +3811,7 @@ cluster_dfw1 = http://dfw1.host/v1/
     def test_link_fd_to_path_linkat_success(self):
         tempdir = mkdtemp()
         fd = os.open(tempdir, utils.O_TMPFILE | os.O_WRONLY)
-        data = "I'm whatever Gotham needs me to be"
+        data = b"I'm whatever Gotham needs me to be"
         _m_fsync_dir = mock.Mock()
         try:
             os.write(fd, data)
@@ -3805,8 +3819,8 @@ cluster_dfw1 = http://dfw1.host/v1/
             self.assertRaises(OSError, os.read, fd, 1)
             file_path = os.path.join(tempdir, uuid4().hex)
             with mock.patch('swift.common.utils.fsync_dir', _m_fsync_dir):
-                    utils.link_fd_to_path(fd, file_path, 1)
-            with open(file_path, 'r') as f:
+                utils.link_fd_to_path(fd, file_path, 1)
+            with open(file_path, 'rb') as f:
                 self.assertEqual(f.read(), data)
             self.assertEqual(_m_fsync_dir.call_count, 2)
         finally:
@@ -3818,19 +3832,19 @@ cluster_dfw1 = http://dfw1.host/v1/
         tempdir = mkdtemp()
         # Create and write to a file
         fd, path = tempfile.mkstemp(dir=tempdir)
-        os.write(fd, "hello world")
+        os.write(fd, b"hello world")
         os.fsync(fd)
         os.close(fd)
         self.assertTrue(os.path.exists(path))
 
         fd = os.open(tempdir, utils.O_TMPFILE | os.O_WRONLY)
         try:
-            os.write(fd, "bye world")
+            os.write(fd, b"bye world")
             os.fsync(fd)
             utils.link_fd_to_path(fd, path, 0, fsync=False)
             # Original file now should have been over-written
-            with open(path, 'r') as f:
-                self.assertEqual(f.read(), "bye world")
+            with open(path, 'rb') as f:
+                self.assertEqual(f.read(), b"bye world")
         finally:
             os.close(fd)
             shutil.rmtree(tempdir)
@@ -5904,7 +5918,7 @@ class TestParseContentDisposition(unittest.TestCase):
 class TestIterMultipartMimeDocuments(unittest.TestCase):
 
     def test_bad_start(self):
-        it = utils.iter_multipart_mime_documents(StringIO('blah'), 'unique')
+        it = utils.iter_multipart_mime_documents(BytesIO(b'blah'), b'unique')
         exc = None
         try:
             next(it)
@@ -5914,144 +5928,104 @@ class TestIterMultipartMimeDocuments(unittest.TestCase):
         self.assertTrue('--unique' in str(exc))
 
     def test_empty(self):
-        it = utils.iter_multipart_mime_documents(StringIO('--unique'),
-                                                 'unique')
+        it = utils.iter_multipart_mime_documents(BytesIO(b'--unique'),
+                                                 b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(), '')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'')
+        self.assertRaises(StopIteration, next, it)
 
     def test_basic(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nabcdefg\r\n--unique--'), 'unique')
+            BytesIO(b'--unique\r\nabcdefg\r\n--unique--'), b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(), 'abcdefg')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'abcdefg')
+        self.assertRaises(StopIteration, next, it)
 
     def test_basic2(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
-            'unique')
+            BytesIO(b'--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
+            b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(), 'abcdefg')
+        self.assertEqual(fp.read(), b'abcdefg')
         fp = next(it)
-        self.assertEqual(fp.read(), 'hijkl')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'hijkl')
+        self.assertRaises(StopIteration, next, it)
 
     def test_tiny_reads(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
-            'unique')
+            BytesIO(b'--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
+            b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(2), 'ab')
-        self.assertEqual(fp.read(2), 'cd')
-        self.assertEqual(fp.read(2), 'ef')
-        self.assertEqual(fp.read(2), 'g')
-        self.assertEqual(fp.read(2), '')
+        self.assertEqual(fp.read(2), b'ab')
+        self.assertEqual(fp.read(2), b'cd')
+        self.assertEqual(fp.read(2), b'ef')
+        self.assertEqual(fp.read(2), b'g')
+        self.assertEqual(fp.read(2), b'')
         fp = next(it)
-        self.assertEqual(fp.read(), 'hijkl')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'hijkl')
+        self.assertRaises(StopIteration, next, it)
 
     def test_big_reads(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
-            'unique')
+            BytesIO(b'--unique\r\nabcdefg\r\n--unique\r\nhijkl\r\n--unique--'),
+            b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(65536), 'abcdefg')
-        self.assertEqual(fp.read(), '')
+        self.assertEqual(fp.read(65536), b'abcdefg')
+        self.assertEqual(fp.read(), b'')
         fp = next(it)
-        self.assertEqual(fp.read(), 'hijkl')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'hijkl')
+        self.assertRaises(StopIteration, next, it)
 
     def test_leading_crlfs(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('\r\n\r\n\r\n--unique\r\nabcdefg\r\n'
-                     '--unique\r\nhijkl\r\n--unique--'),
-            'unique')
+            BytesIO(b'\r\n\r\n\r\n--unique\r\nabcdefg\r\n'
+                    b'--unique\r\nhijkl\r\n--unique--'),
+            b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(65536), 'abcdefg')
-        self.assertEqual(fp.read(), '')
+        self.assertEqual(fp.read(65536), b'abcdefg')
+        self.assertEqual(fp.read(), b'')
         fp = next(it)
-        self.assertEqual(fp.read(), 'hijkl')
-        self.assertRaises(StopIteration, it.next)
+        self.assertEqual(fp.read(), b'hijkl')
+        self.assertRaises(StopIteration, next, it)
 
     def test_broken_mid_stream(self):
         # We go ahead and accept whatever is sent instead of rejecting the
         # whole request, in case the partial form is still useful.
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nabc'), 'unique')
+            BytesIO(b'--unique\r\nabc'), b'unique')
         fp = next(it)
-        self.assertEqual(fp.read(), 'abc')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.read(), b'abc')
+        self.assertRaises(StopIteration, next, it)
 
     def test_readline(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nab\r\ncd\ref\ng\r\n--unique\r\nhi\r\n\r\n'
-                     'jkl\r\n\r\n--unique--'), 'unique')
+            BytesIO(b'--unique\r\nab\r\ncd\ref\ng\r\n--unique\r\nhi\r\n\r\n'
+                    b'jkl\r\n\r\n--unique--'), b'unique')
         fp = next(it)
-        self.assertEqual(fp.readline(), 'ab\r\n')
-        self.assertEqual(fp.readline(), 'cd\ref\ng')
-        self.assertEqual(fp.readline(), '')
+        self.assertEqual(fp.readline(), b'ab\r\n')
+        self.assertEqual(fp.readline(), b'cd\ref\ng')
+        self.assertEqual(fp.readline(), b'')
         fp = next(it)
-        self.assertEqual(fp.readline(), 'hi\r\n')
-        self.assertEqual(fp.readline(), '\r\n')
-        self.assertEqual(fp.readline(), 'jkl\r\n')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.readline(), b'hi\r\n')
+        self.assertEqual(fp.readline(), b'\r\n')
+        self.assertEqual(fp.readline(), b'jkl\r\n')
+        self.assertRaises(StopIteration, next, it)
 
     def test_readline_with_tiny_chunks(self):
         it = utils.iter_multipart_mime_documents(
-            StringIO('--unique\r\nab\r\ncd\ref\ng\r\n--unique\r\nhi\r\n'
-                     '\r\njkl\r\n\r\n--unique--'),
-            'unique',
+            BytesIO(b'--unique\r\nab\r\ncd\ref\ng\r\n--unique\r\nhi\r\n'
+                    b'\r\njkl\r\n\r\n--unique--'),
+            b'unique',
             read_chunk_size=2)
         fp = next(it)
-        self.assertEqual(fp.readline(), 'ab\r\n')
-        self.assertEqual(fp.readline(), 'cd\ref\ng')
-        self.assertEqual(fp.readline(), '')
+        self.assertEqual(fp.readline(), b'ab\r\n')
+        self.assertEqual(fp.readline(), b'cd\ref\ng')
+        self.assertEqual(fp.readline(), b'')
         fp = next(it)
-        self.assertEqual(fp.readline(), 'hi\r\n')
-        self.assertEqual(fp.readline(), '\r\n')
-        self.assertEqual(fp.readline(), 'jkl\r\n')
-        exc = None
-        try:
-            next(it)
-        except StopIteration as err:
-            exc = err
-        self.assertTrue(exc is not None)
+        self.assertEqual(fp.readline(), b'hi\r\n')
+        self.assertEqual(fp.readline(), b'\r\n')
+        self.assertEqual(fp.readline(), b'jkl\r\n')
+        self.assertRaises(StopIteration, next, it)
 
 
 class TestParseMimeHeaders(unittest.TestCase):
@@ -6230,7 +6204,7 @@ class TestHashForFileFunction(unittest.TestCase):
             pass
 
     def test_hash_for_file_smallish(self):
-        stub_data = 'some data'
+        stub_data = b'some data'
         with open(self.tempfilename, 'wb') as fd:
             fd.write(stub_data)
         with mock.patch('swift.common.utils.md5') as mock_md5:
@@ -6246,9 +6220,9 @@ class TestHashForFileFunction(unittest.TestCase):
         block_size = utils.MD5_BLOCK_READ_BYTES
         truncate = 523
         start_char = ord('a')
-        expected_blocks = [chr(i) * block_size
+        expected_blocks = [chr(i).encode('utf8') * block_size
                            for i in range(start_char, start_char + num_blocks)]
-        full_data = ''.join(expected_blocks)
+        full_data = b''.join(expected_blocks)
         trimmed_data = full_data[:-truncate]
         # sanity
         self.assertEqual(len(trimmed_data), block_size * num_blocks - truncate)
@@ -6272,7 +6246,7 @@ class TestHashForFileFunction(unittest.TestCase):
             else:
                 self.assertEqual(block, expected_block[:-truncate])
             found_blocks.append(block)
-        self.assertEqual(''.join(found_blocks), trimmed_data)
+        self.assertEqual(b''.join(found_blocks), trimmed_data)
 
     def test_hash_for_file_empty(self):
         with open(self.tempfilename, 'wb'):
@@ -6281,14 +6255,14 @@ class TestHashForFileFunction(unittest.TestCase):
             mock_hasher = mock_md5.return_value
             rv = utils.md5_hash_for_file(self.tempfilename)
         self.assertTrue(mock_hasher.hexdigest.called)
-        self.assertEqual(rv, mock_hasher.hexdigest.return_value)
+        self.assertIs(rv, mock_hasher.hexdigest.return_value)
         self.assertEqual([], mock_hasher.update.call_args_list)
 
     def test_hash_for_file_brittle(self):
         data_to_expected_hash = {
-            '': 'd41d8cd98f00b204e9800998ecf8427e',
-            'some data': '1e50210a0202497fb79bc38b6ade6c34',
-            ('a' * 4096 * 10)[:-523]: '06a41551609656c85f14f659055dc6d3',
+            b'': 'd41d8cd98f00b204e9800998ecf8427e',
+            b'some data': '1e50210a0202497fb79bc38b6ade6c34',
+            (b'a' * 4096 * 10)[:-523]: '06a41551609656c85f14f659055dc6d3',
         }
         # unlike some other places where the concrete implementation really
         # matters for backwards compatibility these brittle tests are probably
@@ -6316,8 +6290,8 @@ class TestSetSwiftDir(unittest.TestCase):
     def setUp(self):
         self.swift_dir = tempfile.mkdtemp()
         self.swift_conf = os.path.join(self.swift_dir, 'swift.conf')
-        self.policy_name = ''.join(random.sample(string.letters, 20))
-        with open(self.swift_conf, "wb") as sc:
+        self.policy_name = ''.join(random.sample(string.ascii_letters, 20))
+        with open(self.swift_conf, "wt") as sc:
             sc.write('''
 [swift-hash]
 swift_hash_path_suffix = changeme
diff --git a/test/unit/helpers.py b/test/unit/helpers.py
index 9ed0f9c9fa..1c4b7efcfc 100644
--- a/test/unit/helpers.py
+++ b/test/unit/helpers.py
@@ -75,7 +75,7 @@ def setup_servers(the_object_server=object_server, extra_conf=None):
         "orig_POLICIES": storage_policy._POLICIES,
         "orig_SysLogHandler": utils.SysLogHandler}
 
-    utils.HASH_PATH_SUFFIX = 'endcap'
+    utils.HASH_PATH_SUFFIX = b'endcap'
     utils.SysLogHandler = mock.MagicMock()
     # Since we're starting up a lot here, we're going to test more than
     # just chunked puts; we're also going to test parts of
diff --git a/tox.ini b/tox.ini
index c60f497516..f28ca1a25c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -29,10 +29,16 @@ setenv = VIRTUAL_ENV={envdir}
 [testenv:py34]
 commands =
   nosetests \
+      test/unit/cli/test_ring_builder_analyzer.py \
+      test/unit/cli/test_ringbuilder.py \
+      test/unit/common/ring \
+      test/unit/common/test_daemon.py \
       test/unit/common/test_exceptions.py \
       test/unit/common/test_header_key_dict.py \
+      test/unit/common/test_linkat.py \
       test/unit/common/test_manager.py \
-      test/unit/common/test_splice.py
+      test/unit/common/test_splice.py \
+      test/unit/common/test_utils.py
 
 [testenv:py35]
 commands = {[testenv:py34]commands}