diff --git a/whipper/common/accurip.py b/whipper/common/accurip.py
index 7ddfb41..47b9932 100644
--- a/whipper/common/accurip.py
+++ b/whipper/common/accurip.py
@@ -193,7 +193,8 @@ def _match_responses(tracks, responses):
         for i, track in enumerate(tracks):
             for v in ('v1', 'v2'):
                 if track.AR[v]['CRC'] == r.checksums[i]:
-                    if r.confidences[i] > track.AR[v]['DBConfidence']:
+                    if (track.AR[v]['DBConfidence'] is None or
+                            r.confidences[i] > track.AR[v]['DBConfidence']):
                         track.AR[v]['DBCRC'] = r.checksums[i]
                         track.AR[v]['DBConfidence'] = r.confidences[i]
                         logger.debug(
@@ -242,7 +243,8 @@ def print_report(result):
                     track.AR['v2']['DBCRC']
                 ) if _f])
             max_conf = max(
-                [track.AR[v]['DBConfidence'] for v in ('v1', 'v2')]
+                [track.AR[v]['DBConfidence'] for v in ('v1', 'v2')
+                 if track.AR[v]['DBConfidence'] is not None], default=None
             )
             if max_conf:
                 if max_conf < track.AR['DBMaxConfidence']:
diff --git a/whipper/common/cache.py b/whipper/common/cache.py
index 2f94830..d413398 100644
--- a/whipper/common/cache.py
+++ b/whipper/common/cache.py
@@ -98,7 +98,7 @@ class Persister:
         if not os.path.exists(self._path):
             return
 
-        handle = open(self._path)
+        handle = open(self._path, 'rb')
         import pickle
 
         try:
diff --git a/whipper/common/config.py b/whipper/common/config.py
index 44a701a..8774c86 100644
--- a/whipper/common/config.py
+++ b/whipper/common/config.py
@@ -44,7 +44,7 @@ class Config:
         # Open the file with the correct encoding
         if os.path.exists(self._path):
             with codecs.open(self._path, 'r', encoding='utf-8') as f:
-                self._parser.readfp(f)
+                self._parser.read_file(f)
 
         logger.debug('loaded %d sections from config file',
                      len(self._parser.sections()))
diff --git a/whipper/common/renamer.py b/whipper/common/renamer.py
index d2af230..941b018 100644
--- a/whipper/common/renamer.py
+++ b/whipper/common/renamer.py
@@ -91,7 +91,7 @@ class Operator:
         Execute the operations
         """
 
-    def next(self):
+    def __next__(self):
         operation = self._todo[len(self._done)]
         if self._resuming:
             operation.redo()
@@ -199,7 +199,8 @@ class RenameInFile(Operation):
             (fd, name) = tempfile.mkstemp(suffix='.whipper')
 
             for s in handle:
-                os.write(fd, s.replace(self._source, self._destination))
+                os.write(fd,
+                         s.replace(self._source, self._destination).encode())
 
             os.close(fd)
             os.rename(name, self._path)
diff --git a/whipper/image/table.py b/whipper/image/table.py
index cbb2711..131cc47 100644
--- a/whipper/image/table.py
+++ b/whipper/image/table.py
@@ -220,10 +220,12 @@ class Table:
             # if on a session border, subtract the session leadin
             thisTrack = self.tracks[number - 1]
             nextTrack = self.tracks[number]
-            if None not in [thisTrack.session, nextTrack.session]:
-                if nextTrack.session > thisTrack.session:
-                    gap = self._getSessionGap(nextTrack.session)
-                    end -= gap
+            # The session attribute of a track is None by default (session 1)
+            # with value > 1 if the track is in another session. Py3 doesn't
+            # allow NoneType comparisons so we compare against 1 in that case
+            if int(nextTrack.session or 1) > int(thisTrack.session or 1):
+                gap = self._getSessionGap(nextTrack.session)
+                end -= gap
 
         return end
 
@@ -286,7 +288,7 @@ class Table:
             offset = self.getTrackStart(track.number) + delta
             offsets.append(offset)
             debug.append(str(offset))
-            seconds = offset / common.FRAMES_PER_SECOND
+            seconds = offset // common.FRAMES_PER_SECOND
             n += self._cddbSum(seconds)
 
         # the 'real' leadout, not offset by 150 frames
@@ -389,11 +391,11 @@ class Table:
         discid = self.getMusicBrainzDiscId()
         values = self._getMusicBrainzValues()
 
-        query = urlencode({
-            'id': discid,
-            'toc': ' '.join([str(v) for v in values]),
-            'tracks': self.getAudioTracks(),
-        })
+        query = urlencode([
+            ('toc', ' '.join([str(v) for v in values])),
+            ('tracks', self.getAudioTracks()),
+            ('id', discid),
+        ])
 
         return urlunparse((
             'https', host, '/cdtoc/attach', '', query, ''))
diff --git a/whipper/test/common.py b/whipper/test/common.py
index b1ba2e7..a55ee14 100644
--- a/whipper/test/common.py
+++ b/whipper/test/common.py
@@ -70,7 +70,7 @@ class TestCase(unittest.TestCase):
         version so we can use it in comparisons.
         """
         cuefile = os.path.join(os.path.dirname(__file__), name)
-        ret = open(cuefile).read().decode('utf-8')
+        ret = open(cuefile).read()
         ret = re.sub(
             'REM COMMENT "whipper.*',
             'REM COMMENT "whipper %s"' % whipper.__version__,
diff --git a/whipper/test/test_command_mblookup.py b/whipper/test/test_command_mblookup.py
index ee8d664..c13cb93 100644
--- a/whipper/test/test_command_mblookup.py
+++ b/whipper/test/test_command_mblookup.py
@@ -16,7 +16,7 @@ class MBLookupTestCase(unittest.TestCase):
         """Mock function for whipper.common.mbngs.musicbrainz function."""
         filename = "whipper.discid.{}.pickle".format(discid)
         path = os.path.join(os.path.dirname(__file__), filename)
-        with open(path) as p:
+        with open(path, "rb") as p:
             return pickle.load(p)
 
     def testMissingReleaseType(self):
diff --git a/whipper/test/test_common_accurip.py b/whipper/test/test_common_accurip.py
index 9cb1ef2..4b5378b 100644
--- a/whipper/test/test_common_accurip.py
+++ b/whipper/test/test_common_accurip.py
@@ -2,7 +2,7 @@
 # vi:si:et:sw=4:sts=4:ts=4
 
 import sys
-from StringIO import StringIO
+from io import StringIO
 from os import chmod, makedirs
 from os.path import dirname, exists, join
 from shutil import copy, rmtree
@@ -22,7 +22,7 @@ class TestAccurateRipResponse(TestCase):
     def setUpClass(cls):
         cls.path = 'c/1/2/dBAR-002-0000f21c-00027ef8-05021002.bin'
         cls.entry = _split_responses(
-            open(join(dirname(__file__), cls.path[6:])).read()
+            open(join(dirname(__file__), cls.path[6:]), "rb").read()
         )
         cls.other_path = '4/8/2/dBAR-011-0010e284-009228a3-9809ff0b.bin'
 
@@ -101,7 +101,7 @@ class TestVerifyResult(TestCase):
     def setUpClass(cls):
         path = 'c/1/2/dBAR-002-0000f21c-00027ef8-05021002.bin'
         cls.responses = _split_responses(
-            open(join(dirname(__file__), path[6:])).read()
+            open(join(dirname(__file__), path[6:]), "rb").read()
         )
         cls.checksums = {
             'v1': ['284fc705', '9cc1f32e'],
diff --git a/whipper/test/test_common_mbngs.py b/whipper/test/test_common_mbngs.py
index b99a1bc..492f466 100644
--- a/whipper/test/test_common_mbngs.py
+++ b/whipper/test/test_common_mbngs.py
@@ -18,7 +18,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.c56ff16e-1d81-47de-926f-ba22891bd2bd.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "b.yqPuCBdsV5hrzDvYrw52iK_jE-"
 
@@ -31,7 +31,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.a76714e0-32b1-4ed4-b28e-f86d99642193.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "f7XO36a7n1LCCskkCiulReWbwZA-"
 
@@ -59,7 +59,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.e32ae79a-336e-4d33-945c-8c5e8206dbd3.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "xAq8L4ELMW14.6wI6tt7QAcxiDI-"
 
@@ -93,7 +93,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.61c6fd9b-18f8-4a45-963a-ba3c5d990cae.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "u0aKVpO.59JBy6eQRX2vYcoqQZ0-"
 
@@ -130,7 +130,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.8478d4da-0cda-4e46-ae8c-1eeacfa5cf37.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "RhrwgVb0hZNkabQCw1dZIhdbMFg-"
 
@@ -167,7 +167,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.f484a9fc-db21-4106-9408-bcd105c90047.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "X2c2IQ5vUy5x6Jh7Xi_DGHtA1X8-"
 
@@ -214,7 +214,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.d8e6153a-2c47-4804-9d73-0aac1081c3b1.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "xu338_M8WukSRi0J.KTlDoflB8Y-"  # disc 4
 
@@ -228,7 +228,7 @@ class MetadataTestCase(unittest.TestCase):
         filename = 'whipper.release.6109ceed-7e21-490b-b5ad-3a66b4e4cfbb.json'
         path = os.path.join(os.path.dirname(__file__), filename)
         handle = open(path, "rb")
-        response = json.loads(handle.read())
+        response = json.loads(handle.read().decode('utf-8'))
         handle.close()
         discid = "cHW1Uutl_kyWNaLJsLmTGTe4rnE-"
 
diff --git a/whipper/test/test_common_renamer.py b/whipper/test/test_common_renamer.py
index bcfb7dc..c33ca07 100644
--- a/whipper/test/test_common_renamer.py
+++ b/whipper/test/test_common_renamer.py
@@ -13,7 +13,7 @@ class RenameInFileTestcase(unittest.TestCase):
 
     def setUp(self):
         (fd, self._path) = tempfile.mkstemp(suffix='.whipper.renamer.infile')
-        os.write(fd, 'This is a test\nThis is another\n')
+        os.write(fd, 'This is a test\nThis is another\n'.encode())
         os.close(fd)
 
     def testVerify(self):
@@ -43,7 +43,7 @@ class RenameFileTestcase(unittest.TestCase):
 
     def setUp(self):
         (fd, self._source) = tempfile.mkstemp(suffix='.whipper.renamer.file')
-        os.write(fd, 'This is a test\nThis is another\n')
+        os.write(fd, 'This is a test\nThis is another\n'.encode())
         os.close(fd)
         (fd, self._destination) = tempfile.mkstemp(
             suffix='.whipper.renamer.file')
@@ -87,7 +87,7 @@ class OperatorTestCase(unittest.TestCase):
 
         (fd, self._source) = tempfile.mkstemp(
             suffix='.whipper.renamer.operator')
-        os.write(fd, 'This is a test\nThis is another\n')
+        os.write(fd, 'This is a test\nThis is another\n'.encode())
         os.close(fd)
         (fd, self._destination) = tempfile.mkstemp(
             suffix='.whipper.renamer.operator')
diff --git a/whipper/test/test_image_toc.py b/whipper/test/test_image_toc.py
index 34293d1..04bf04a 100644
--- a/whipper/test/test_image_toc.py
+++ b/whipper/test/test_image_toc.py
@@ -364,7 +364,7 @@ class StrokesTestCase(common.TestCase):
         ref = self._filterCue(
             open(os.path.join(
                 os.path.dirname(__file__),
-                'strokes-someday.eac.cue')).read()).decode('utf-8')
+                'strokes-someday.eac.cue')).read())
         common.diffStrings(ref, cue)
 
     @staticmethod