diff --git a/beetsplug/duplicates.py b/beetsplug/duplicates.py
index 3a04557ca..b3ee90742 100644
--- a/beetsplug/duplicates.py
+++ b/beetsplug/duplicates.py
@@ -15,8 +15,7 @@
 
 """List duplicate tracks or albums.
 """
-from __future__ import (division, absolute_import, print_function,
-                        unicode_literals)
+from __future__ import (division, absolute_import, print_function)
 
 import shlex
 
@@ -54,51 +53,56 @@ class DuplicatesPlugin(BeetsPlugin):
         self._command = Subcommand('duplicates',
                                    help=__doc__,
                                    aliases=['dup'])
-        self._command.parser.add_option('-c', '--count', dest='count',
-                                        action='store_true',
-                                        help='show duplicate counts')
+        self._command.parser.add_option(
+            u'-c', u'--count', dest='count',
+            action='store_true',
+            help=u'show duplicate counts')
 
-        self._command.parser.add_option('-C', '--checksum', dest='checksum',
-                                        action='store', metavar='PROG',
-                                        help='report duplicates based on'
-                                        ' arbitrary command')
+        self._command.parser.add_option(
+            u'-C', u'--checksum', dest='checksum',
+            action='store', metavar='PROG',
+            help=u'report duplicates based on arbitrary command')
 
-        self._command.parser.add_option('-d', '--delete', dest='delete',
-                                        action='store_true',
-                                        help='delete items from library and '
-                                        'disk')
+        self._command.parser.add_option(
+            u'-d', u'--delete', dest='delete',
+            action='store_true',
+            help=u'delete items from library and disk')
 
-        self._command.parser.add_option('-F', '--full', dest='full',
-                                        action='store_true',
-                                        help='show all versions of duplicate'
-                                        ' tracks or albums')
+        self._command.parser.add_option(
+            u'-F', u'--full', dest='full',
+            action='store_true',
+            help=u'show all versions of duplicate tracks or albums')
 
-        self._command.parser.add_option('-s', '--strict', dest='strict',
-                                        action='store_true',
-                                        help='report duplicates only if all'
-                                        ' attributes are set')
+        self._command.parser.add_option(
+            u'-s', u'--strict', dest='strict',
+            action='store_true',
+            help=u'report duplicates only if all attributes are set')
 
-        self._command.parser.add_option('-k', '--keys', dest='keys',
-                                        action='callback', metavar='KEY1 KEY2',
-                                        callback=vararg_callback,
-                                        help='report duplicates based on keys')
+        self._command.parser.add_option(
+            u'-k', u'--keys', dest='keys',
+            action='callback', metavar='KEY1 KEY2',
+            callback=vararg_callback,
+            help=u'report duplicates based on keys')
 
-        self._command.parser.add_option('-M', '--merge', dest='merge',
-                                        action='store_true',
-                                        help='merge duplicate items')
+        self._command.parser.add_option(
+            u'-M', u'--merge', dest='merge',
+            action='store_true',
+            help=u'merge duplicate items')
 
-        self._command.parser.add_option('-m', '--move', dest='move',
-                                        action='store', metavar='DEST',
-                                        help='move items to dest')
+        self._command.parser.add_option(
+            u'-m', u'--move', dest='move',
+            action='store', metavar='DEST',
+            help=u'move items to dest')
 
-        self._command.parser.add_option('-o', '--copy', dest='copy',
-                                        action='store', metavar='DEST',
-                                        help='copy items to dest')
+        self._command.parser.add_option(
+            u'-o', u'--copy', dest='copy',
+            action='store', metavar='DEST',
+            help=u'copy items to dest')
 
-        self._command.parser.add_option('-t', '--tag', dest='tag',
-                                        action='store',
-                                        help='tag matched items with \'k=v\''
-                                        ' attribute')
+        self._command.parser.add_option(
+            u'-t', u'--tag', dest='tag',
+            action='store',
+            help=u'tag matched items with \'k=v\' attribute')
 
         self._command.parser.add_all_common_options()
 
@@ -181,7 +185,8 @@ class DuplicatesPlugin(BeetsPlugin):
             try:
                 k, v = tag.split('=')
             except:
-                raise UserError('%s: can\'t parse k=v tag: %s' % (PLUGIN, tag))
+                raise UserError(
+                    u'%s: can\'t parse k=v tag: %s' % (PLUGIN, tag))
             setattr(item, k, v)
             item.store()
 
@@ -195,7 +200,7 @@ class DuplicatesPlugin(BeetsPlugin):
         checksum = getattr(item, key, False)
         if not checksum:
             self._log.debug(u'key {0} on item {1} not cached:'
-                            'computing checksum',
+                            u'computing checksum',
                             key, displayable_path(item.path))
             try:
                 checksum = command_output(args)
@@ -208,7 +213,7 @@ class DuplicatesPlugin(BeetsPlugin):
                                 displayable_path(item.path), e)
         else:
             self._log.debug(u'key {0} on item {1} cached:'
-                            'not computing checksum',
+                            u'not computing checksum',
                             key, displayable_path(item.path))
         return key, checksum
 
@@ -225,11 +230,11 @@ class DuplicatesPlugin(BeetsPlugin):
             values = [v for v in values if v not in (None, '')]
             if strict and len(values) < len(keys):
                 self._log.debug(u'some keys {0} on item {1} are null or empty:'
-                                ' skipping',
+                                u' skipping',
                                 keys, displayable_path(obj.path))
             elif (not strict and not len(values)):
                 self._log.debug(u'all keys {0} on item {1} are null or empty:'
-                                ' skipping',
+                                u' skipping',
                                 keys, displayable_path(obj.path))
             else:
                 key = tuple(values)
@@ -279,7 +284,7 @@ class DuplicatesPlugin(BeetsPlugin):
                     value = getattr(o, f, None)
                     if value:
                         self._log.debug(u'key {0} on item {1} is null '
-                                        'or empty: setting from item {2}',
+                                        u'or empty: setting from item {2}',
                                         f, displayable_path(objs[0].path),
                                         displayable_path(o.path))
                         setattr(objs[0], f, value)
@@ -300,7 +305,7 @@ class DuplicatesPlugin(BeetsPlugin):
                     missing.album_id = objs[0].id
                     missing.add(i._db)
                     self._log.debug(u'item {0} missing from album {1}:'
-                                    ' merging from {2} into {3}',
+                                    u' merging from {2} into {3}',
                                     missing,
                                     objs[0],
                                     displayable_path(o.path),