diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e447294eb7a..a2aeb014a00 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,9 +17,6 @@
   sha: v1.3.4
   hooks:
     - id: reorder-python-imports
-      language_version: 'python2.7'
+      language_version: 'python3.7'
       args:
-        - --add-import
-        - from __future__ import absolute_import
-        - --add-import
-        - from __future__ import unicode_literals
+         - --py3-plus
diff --git a/Dockerfile b/Dockerfile
index 918c6876b9d..ca0093b9f39 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,8 +24,6 @@ RUN apk add --no-cache \
     musl-dev \
     openssl \
     openssl-dev \
-    python2 \
-    python2-dev \
     zlib-dev
 ENV BUILD_BOOTLOADER=1
 
@@ -40,7 +38,6 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
     libssl-dev \
     make \
     openssl \
-    python2.7-dev \
     zlib1g-dev
 
 FROM build-${BUILD_PLATFORM} AS build
diff --git a/bin/docker-compose b/bin/docker-compose
index aeb53870303..5976e1d4aa5 100755
--- a/bin/docker-compose
+++ b/bin/docker-compose
@@ -1,6 +1,3 @@
 #!/usr/bin/env python
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose.cli.main import main
 main()
diff --git a/compose/__init__.py b/compose/__init__.py
index 6e5fcaae99b..449e29da495 100644
--- a/compose/__init__.py
+++ b/compose/__init__.py
@@ -1,4 +1,2 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 __version__ = '1.26.0-rc1'
diff --git a/compose/__main__.py b/compose/__main__.py
index 27a7acbb8d1..199ba2ae9b4 100644
--- a/compose/__main__.py
+++ b/compose/__main__.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose.cli.main import main
 
 main()
diff --git a/compose/cli/colors.py b/compose/cli/colors.py
index ea45198e07d..c6a869bf59d 100644
--- a/compose/cli/colors.py
+++ b/compose/cli/colors.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from ..const import IS_WINDOWS_PLATFORM
 
 NAMES = [
diff --git a/compose/cli/command.py b/compose/cli/command.py
index 7621134e8f7..f18f7663995 100644
--- a/compose/cli/command.py
+++ b/compose/cli/command.py
@@ -1,12 +1,7 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import os
 import re
 
-import six
-
 from . import errors
 from .. import config
 from .. import parallel
@@ -110,7 +105,7 @@ def get_config_from_options(base_dir, options, additional_options=None):
 
 def get_config_path_from_options(base_dir, options, environment):
     def unicode_paths(paths):
-        return [p.decode('utf-8') if isinstance(p, six.binary_type) else p for p in paths]
+        return [p.decode('utf-8') if isinstance(p, bytes) else p for p in paths]
 
     file_option = options.get('--file')
     if file_option:
diff --git a/compose/cli/docker_client.py b/compose/cli/docker_client.py
index d4cdc96e8f5..493597b8071 100644
--- a/compose/cli/docker_client.py
+++ b/compose/cli/docker_client.py
@@ -1,11 +1,7 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import os.path
 import ssl
 
-import six
 from docker import APIClient
 from docker import Context
 from docker import ContextAPI
@@ -47,7 +43,7 @@ def get_client(environment, verbose=False, version=None, context=None):
         environment=environment, tls_version=get_tls_version(environment)
     )
     if verbose:
-        version_info = six.iteritems(client.version())
+        version_info = client.version().items()
         log.info(get_version_info('full'))
         log.info("Docker base_url: %s", client.base_url)
         log.info("Docker version: %s",
diff --git a/compose/cli/docopt_command.py b/compose/cli/docopt_command.py
index 809a4b7455e..d0ba7f67026 100644
--- a/compose/cli/docopt_command.py
+++ b/compose/cli/docopt_command.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from inspect import getdoc
 
 from docopt import docopt
@@ -14,7 +11,7 @@ def docopt_full_help(docstring, *args, **kwargs):
         raise SystemExit(docstring)
 
 
-class DocoptDispatcher(object):
+class DocoptDispatcher:
 
     def __init__(self, command_class, options):
         self.command_class = command_class
@@ -53,7 +50,7 @@ def get_handler(command_class, command):
 
 class NoSuchCommand(Exception):
     def __init__(self, command, supercommand):
-        super(NoSuchCommand, self).__init__("No such command: %s" % command)
+        super().__init__("No such command: %s" % command)
 
         self.command = command
         self.supercommand = supercommand
diff --git a/compose/cli/errors.py b/compose/cli/errors.py
index 189b67faf67..d1a47f07833 100644
--- a/compose/cli/errors.py
+++ b/compose/cli/errors.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import contextlib
 import logging
 import socket
diff --git a/compose/cli/formatter.py b/compose/cli/formatter.py
index 9651fb4da44..0bde6b4a2c6 100644
--- a/compose/cli/formatter.py
+++ b/compose/cli/formatter.py
@@ -1,10 +1,6 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import shutil
 
-import six
 import texttable
 
 from compose.cli import colors
@@ -57,7 +53,7 @@ def get_level_message(self, record):
         return ''
 
     def format(self, record):
-        if isinstance(record.msg, six.binary_type):
+        if isinstance(record.msg, bytes):
             record.msg = record.msg.decode('utf-8')
-        message = super(ConsoleWarningFormatter, self).format(record)
+        message = super().format(record)
         return '{0}{1}'.format(self.get_level_message(record), message)
diff --git a/compose/cli/log_printer.py b/compose/cli/log_printer.py
index a4b70a67205..ca46b975e72 100644
--- a/compose/cli/log_printer.py
+++ b/compose/cli/log_printer.py
@@ -1,23 +1,19 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
+import _thread as thread
 import sys
 from collections import namedtuple
 from itertools import cycle
+from queue import Empty
+from queue import Queue
 from threading import Thread
 
 from docker.errors import APIError
-from six.moves import _thread as thread
-from six.moves.queue import Empty
-from six.moves.queue import Queue
 
 from . import colors
-from compose import utils
 from compose.cli.signals import ShutdownException
 from compose.utils import split_buffer
 
 
-class LogPresenter(object):
+class LogPresenter:
 
     def __init__(self, prefix_width, color_func):
         self.prefix_width = prefix_width
@@ -54,7 +50,7 @@ def max_name_width(service_names, max_index_width=3):
     return max(len(name) for name in service_names) + max_index_width
 
 
-class LogPrinter(object):
+class LogPrinter:
     """Print logs from many containers to a single output stream."""
 
     def __init__(self,
@@ -67,7 +63,7 @@ def __init__(self,
         self.containers = containers
         self.presenters = presenters
         self.event_stream = event_stream
-        self.output = utils.get_output_stream(output)
+        self.output = output
         self.cascade_stop = cascade_stop
         self.log_args = log_args or {}
 
diff --git a/compose/cli/main.py b/compose/cli/main.py
index e226a600869..5ec6181e4c4 100644
--- a/compose/cli/main.py
+++ b/compose/cli/main.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import contextlib
 import functools
 import json
@@ -180,7 +176,7 @@ def parse_doc_section(name, source):
     return [s.strip() for s in pattern.findall(source)]
 
 
-class TopLevelCommand(object):
+class TopLevelCommand:
     """Define and run multi-container applications with Docker.
 
     Usage:
diff --git a/compose/cli/signals.py b/compose/cli/signals.py
index 44def2ece65..0244e70189a 100644
--- a/compose/cli/signals.py
+++ b/compose/cli/signals.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import signal
 
 from ..const import IS_WINDOWS_PLATFORM
diff --git a/compose/cli/utils.py b/compose/cli/utils.py
index 931487a6cdc..d1c9bae100b 100644
--- a/compose/cli/utils.py
+++ b/compose/cli/utils.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import division
-from __future__ import unicode_literals
-
 import math
 import os
 import platform
@@ -10,7 +6,6 @@
 import sys
 
 import docker
-import six
 
 import compose
 from ..const import IS_WINDOWS_PLATFORM
@@ -144,7 +139,7 @@ def human_readable_file_size(size):
 
 
 def binarystr_to_unicode(s):
-    if not isinstance(s, six.binary_type):
+    if not isinstance(s, bytes):
         return s
 
     if IS_WINDOWS_PLATFORM:
diff --git a/compose/cli/verbose_proxy.py b/compose/cli/verbose_proxy.py
index b1592eabe73..22a97e6d02e 100644
--- a/compose/cli/verbose_proxy.py
+++ b/compose/cli/verbose_proxy.py
@@ -1,17 +1,12 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import functools
 import logging
 import pprint
 from itertools import chain
 
-import six
-
 
 def format_call(args, kwargs):
     args = (repr(a) for a in args)
-    kwargs = ("{0!s}={1!r}".format(*item) for item in six.iteritems(kwargs))
+    kwargs = ("{0!s}={1!r}".format(*item) for item in kwargs.items())
     return "({0})".format(", ".join(chain(args, kwargs)))
 
 
@@ -27,7 +22,7 @@ def format_return(result, max_lines):
     return result
 
 
-class VerboseProxy(object):
+class VerboseProxy:
     """Proxy all function calls to another class and log method name, arguments
     and return values for each call.
     """
@@ -41,7 +36,7 @@ def __init__(self, obj_name, obj, log_name=None, max_lines=10):
     def __getattr__(self, name):
         attr = getattr(self.obj, name)
 
-        if not six.callable(attr):
+        if not callable(attr):
             return attr
 
         return functools.partial(self.proxy_callable, name)
diff --git a/compose/config/__init__.py b/compose/config/__init__.py
index 2b40666f149..855b2401d94 100644
--- a/compose/config/__init__.py
+++ b/compose/config/__init__.py
@@ -1,7 +1,4 @@
 # flake8: noqa
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from . import environment
 from .config import ConfigurationError
 from .config import DOCKER_CONFIG_KEYS
diff --git a/compose/config/config.py b/compose/config/config.py
index 56761d18146..0fbe6406b44 100644
--- a/compose/config/config.py
+++ b/compose/config/config.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import functools
 import io
 import logging
@@ -11,7 +8,6 @@
 from collections import namedtuple
 from operator import attrgetter
 
-import six
 import yaml
 from cached_property import cached_property
 
@@ -204,7 +200,7 @@ def version(self):
                         'Compose file version 1.'.format(self.filename))
             return V1
 
-        if not isinstance(version, six.string_types):
+        if not isinstance(version, str):
             raise ConfigurationError(
                 'Version in "{}" is invalid - it should be a string.'
                 .format(self.filename))
@@ -589,7 +585,7 @@ def process_config_file(config_file, environment, service_name=None, interpolate
     return config_file
 
 
-class ServiceExtendsResolver(object):
+class ServiceExtendsResolver:
     def __init__(self, service_config, config_file, environment, already_seen=None):
         self.service_config = service_config
         self.working_dir = service_config.working_dir
@@ -688,12 +684,12 @@ def resolve_environment(service_dict, environment=None):
         env.update(env_vars_from_file(env_file))
 
     env.update(parse_environment(service_dict.get('environment')))
-    return dict(resolve_env_var(k, v, environment) for k, v in six.iteritems(env))
+    return dict(resolve_env_var(k, v, environment) for k, v in env.items())
 
 
 def resolve_build_args(buildargs, environment):
     args = parse_build_arguments(buildargs)
-    return dict(resolve_env_var(k, v, environment) for k, v in six.iteritems(args))
+    return dict(resolve_env_var(k, v, environment) for k, v in args.items())
 
 
 def validate_extended_service_dict(service_dict, filename, service):
@@ -780,7 +776,7 @@ def process_service(service_config):
 
 
 def process_build_section(service_dict, working_dir):
-    if isinstance(service_dict['build'], six.string_types):
+    if isinstance(service_dict['build'], str):
         service_dict['build'] = resolve_build_path(working_dir, service_dict['build'])
     elif isinstance(service_dict['build'], dict):
         if 'context' in service_dict['build']:
@@ -848,7 +844,7 @@ def process_healthcheck(service_dict):
         hc['test'] = ['NONE']
 
     for field in ['interval', 'timeout', 'start_period']:
-        if field not in hc or isinstance(hc[field], six.integer_types):
+        if field not in hc or isinstance(hc[field], int):
             continue
         hc[field] = parse_nanoseconds_int(hc[field])
 
@@ -1179,7 +1175,7 @@ def parse_sequence_func(seq):
 def merge_build(output, base, override):
     def to_dict(service):
         build_config = service.get('build', {})
-        if isinstance(build_config, six.string_types):
+        if isinstance(build_config, str):
             return {'context': build_config}
         return build_config
 
@@ -1389,7 +1385,7 @@ def normalize_build(service_dict, working_dir, environment):
     if 'build' in service_dict:
         build = {}
         # Shortcut where specifying a string is treated as the build context
-        if isinstance(service_dict['build'], six.string_types):
+        if isinstance(service_dict['build'], str):
             build['context'] = service_dict.pop('build')
         else:
             build.update(service_dict['build'])
@@ -1415,7 +1411,7 @@ def validate_paths(service_dict):
     if 'build' in service_dict:
         build = service_dict.get('build', {})
 
-        if isinstance(build, six.string_types):
+        if isinstance(build, str):
             build_path = build
         elif isinstance(build, dict) and 'context' in build:
             build_path = build['context']
@@ -1506,7 +1502,7 @@ def merge_list_or_string(base, override):
 def to_list(value):
     if value is None:
         return []
-    elif isinstance(value, six.string_types):
+    elif isinstance(value, str):
         return [value]
     else:
         return value
diff --git a/compose/config/environment.py b/compose/config/environment.py
index 6afbfc97244..2f3932db50e 100644
--- a/compose/config/environment.py
+++ b/compose/config/environment.py
@@ -1,12 +1,8 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import os
 import re
 
 import dotenv
-import six
 
 from ..const import IS_WINDOWS_PLATFORM
 from .errors import ConfigurationError
@@ -16,7 +12,7 @@
 
 
 def split_env(env):
-    if isinstance(env, six.binary_type):
+    if isinstance(env, bytes):
         env = env.decode('utf-8', 'replace')
     key = value = None
     if '=' in env:
@@ -44,7 +40,7 @@ def env_vars_from_file(filename):
 
 class Environment(dict):
     def __init__(self, *args, **kwargs):
-        super(Environment, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self.missing_keys = []
         self.silent = False
 
@@ -82,11 +78,11 @@ def from_command_line(cls, parsed_env_opts):
 
     def __getitem__(self, key):
         try:
-            return super(Environment, self).__getitem__(key)
+            return super().__getitem__(key)
         except KeyError:
             if IS_WINDOWS_PLATFORM:
                 try:
-                    return super(Environment, self).__getitem__(key.upper())
+                    return super().__getitem__(key.upper())
                 except KeyError:
                     pass
             if not self.silent and key not in self.missing_keys:
@@ -99,20 +95,20 @@ def __getitem__(self, key):
             return ""
 
     def __contains__(self, key):
-        result = super(Environment, self).__contains__(key)
+        result = super().__contains__(key)
         if IS_WINDOWS_PLATFORM:
             return (
-                result or super(Environment, self).__contains__(key.upper())
+                result or super().__contains__(key.upper())
             )
         return result
 
     def get(self, key, *args, **kwargs):
         if IS_WINDOWS_PLATFORM:
-            return super(Environment, self).get(
+            return super().get(
                 key,
-                super(Environment, self).get(key.upper(), *args, **kwargs)
+                super().get(key.upper(), *args, **kwargs)
             )
-        return super(Environment, self).get(key, *args, **kwargs)
+        return super().get(key, *args, **kwargs)
 
     def get_boolean(self, key):
         # Convert a value to a boolean using "common sense" rules.
diff --git a/compose/config/errors.py b/compose/config/errors.py
index 9b2078f2c6d..3e8a834d004 100644
--- a/compose/config/errors.py
+++ b/compose/config/errors.py
@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 
 VERSION_EXPLANATION = (
@@ -42,7 +40,7 @@ def msg(self):
 
 class ComposeFileNotFound(ConfigurationError):
     def __init__(self, supported_filenames):
-        super(ComposeFileNotFound, self).__init__("""
+        super().__init__("""
         Can't find a suitable configuration file in this directory or any
         parent. Are you in the right directory?
 
@@ -53,7 +51,7 @@ def __init__(self, supported_filenames):
 class DuplicateOverrideFileFound(ConfigurationError):
     def __init__(self, override_filenames):
         self.override_filenames = override_filenames
-        super(DuplicateOverrideFileFound, self).__init__(
+        super().__init__(
             "Multiple override files found: {}. You may only use a single "
             "override file.".format(", ".join(override_filenames))
         )
diff --git a/compose/config/interpolation.py b/compose/config/interpolation.py
index 18be8562cbb..a4c9a574479 100644
--- a/compose/config/interpolation.py
+++ b/compose/config/interpolation.py
@@ -1,12 +1,7 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import re
 from string import Template
 
-import six
-
 from .errors import ConfigurationError
 from compose.const import COMPOSEFILE_V2_0 as V2_0
 from compose.utils import parse_bytes
@@ -16,7 +11,7 @@
 log = logging.getLogger(__name__)
 
 
-class Interpolator(object):
+class Interpolator:
 
     def __init__(self, templater, mapping):
         self.templater = templater
@@ -77,7 +72,7 @@ def recursive_interpolate(obj, interpolator, config_path):
     def append(config_path, key):
         return '{}/{}'.format(config_path, key)
 
-    if isinstance(obj, six.string_types):
+    if isinstance(obj, str):
         return converter.convert(config_path, interpolator.interpolate(obj))
     if isinstance(obj, dict):
         return dict(
@@ -138,7 +133,7 @@ def convert(mo):
 
             if named is not None:
                 val = mapping[named]
-                if isinstance(val, six.binary_type):
+                if isinstance(val, bytes):
                     val = val.decode('utf-8')
                 return '%s' % (val,)
             if mo.group('escaped') is not None:
@@ -177,7 +172,7 @@ def service_path(*args):
 
 
 def to_boolean(s):
-    if not isinstance(s, six.string_types):
+    if not isinstance(s, str):
         return s
     s = s.lower()
     if s in ['y', 'yes', 'true', 'on']:
@@ -188,11 +183,11 @@ def to_boolean(s):
 
 
 def to_int(s):
-    if not isinstance(s, six.string_types):
+    if not isinstance(s, str):
         return s
 
     # We must be able to handle octal representation for `mode` values notably
-    if six.PY3 and re.match('^0[0-9]+$', s.strip()):
+    if re.match('^0[0-9]+$', s.strip()):
         s = '0o' + s[1:]
     try:
         return int(s, base=0)
@@ -201,7 +196,7 @@ def to_int(s):
 
 
 def to_float(s):
-    if not isinstance(s, six.string_types):
+    if not isinstance(s, str):
         return s
 
     try:
@@ -224,12 +219,12 @@ def bytes_to_int(s):
 
 
 def to_microseconds(v):
-    if not isinstance(v, six.string_types):
+    if not isinstance(v, str):
         return v
     return int(parse_nanoseconds_int(v) / 1000)
 
 
-class ConversionMap(object):
+class ConversionMap:
     map = {
         service_path('blkio_config', 'weight'): to_int,
         service_path('blkio_config', 'weight_device', 'weight'): to_int,
diff --git a/compose/config/serialize.py b/compose/config/serialize.py
index 5776ce957cb..fe0d007a60f 100644
--- a/compose/config/serialize.py
+++ b/compose/config/serialize.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
-import six
 import yaml
 
 from compose.config import types
@@ -15,7 +11,7 @@
 
 
 def serialize_config_type(dumper, data):
-    representer = dumper.represent_str if six.PY3 else dumper.represent_unicode
+    representer = dumper.represent_str
     return representer(data.repr())
 
 
@@ -25,9 +21,9 @@ def serialize_dict_type(dumper, data):
 
 def serialize_string(dumper, data):
     """ Ensure boolean-like strings are quoted in the output """
-    representer = dumper.represent_str if six.PY3 else dumper.represent_unicode
+    representer = dumper.represent_str
 
-    if isinstance(data, six.binary_type):
+    if isinstance(data, bytes):
         data = data.decode('utf-8')
 
     if data.lower() in ('y', 'n', 'yes', 'no', 'on', 'off', 'true', 'false'):
@@ -98,10 +94,10 @@ def v3_introduced_name_key(key):
 def serialize_config(config, image_digests=None, escape_dollar=True):
     if escape_dollar:
         yaml.SafeDumper.add_representer(str, serialize_string_escape_dollar)
-        yaml.SafeDumper.add_representer(six.text_type, serialize_string_escape_dollar)
+        yaml.SafeDumper.add_representer(str, serialize_string_escape_dollar)
     else:
         yaml.SafeDumper.add_representer(str, serialize_string)
-        yaml.SafeDumper.add_representer(six.text_type, serialize_string)
+        yaml.SafeDumper.add_representer(str, serialize_string)
     return yaml.safe_dump(
         denormalize_config(config, image_digests),
         default_flow_style=False,
diff --git a/compose/config/sort_services.py b/compose/config/sort_services.py
index 42f548a6dd1..a600139b2ac 100644
--- a/compose/config/sort_services.py
+++ b/compose/config/sort_services.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose.config.errors import DependencyError
 
 
diff --git a/compose/config/types.py b/compose/config/types.py
index ab8f34e3d7f..bbd74c6773a 100644
--- a/compose/config/types.py
+++ b/compose/config/types.py
@@ -1,16 +1,12 @@
 """
 Types for objects parsed from the configuration.
 """
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import json
 import ntpath
 import os
 import re
 from collections import namedtuple
 
-import six
 from docker.utils.ports import build_port_bindings
 
 from ..const import COMPOSEFILE_V1 as V1
@@ -104,7 +100,7 @@ def serialize_restart_spec(restart_spec):
         return ''
     parts = [restart_spec['Name']]
     if restart_spec['MaximumRetryCount']:
-        parts.append(six.text_type(restart_spec['MaximumRetryCount']))
+        parts.append(str(restart_spec['MaximumRetryCount']))
     return ':'.join(parts)
 
 
@@ -150,7 +146,7 @@ def normpath(path, win_host=False):
     return path
 
 
-class MountSpec(object):
+class MountSpec:
     options_map = {
         'volume': {
             'nocopy': 'no_copy'
@@ -326,7 +322,7 @@ def merge_field(self):
 class ServiceConfigBase(namedtuple('_ServiceConfigBase', 'source target uid gid mode name')):
     @classmethod
     def parse(cls, spec):
-        if isinstance(spec, six.string_types):
+        if isinstance(spec, str):
             return cls(spec, None, None, None, None, None)
         return cls(
             spec.get('source'),
@@ -364,7 +360,7 @@ def __new__(cls, target, published, *args, **kwargs):
             raise ConfigurationError('Invalid target port: {}'.format(target))
 
         if published:
-            if isinstance(published, six.string_types) and '-' in published:  # "x-y:z" format
+            if isinstance(published, str) and '-' in published:  # "x-y:z" format
                 a, b = published.split('-', 1)
                 try:
                     int(a)
@@ -477,7 +473,7 @@ def normalize_port_dict(port):
 class SecurityOpt(namedtuple('_SecurityOpt', 'value src_file')):
     @classmethod
     def parse(cls, value):
-        if not isinstance(value, six.string_types):
+        if not isinstance(value, str):
             return value
         # based on https://github.com/docker/cli/blob/9de1b162f/cli/command/container/opts.go#L673-L697
         con = value.split('=', 2)
diff --git a/compose/config/validation.py b/compose/config/validation.py
index 1cceb71f0a4..3161b239533 100644
--- a/compose/config/validation.py
+++ b/compose/config/validation.py
@@ -1,13 +1,9 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import json
 import logging
 import os
 import re
 import sys
 
-import six
 from docker.utils.ports import split_port
 from jsonschema import Draft4Validator
 from jsonschema import FormatChecker
@@ -75,13 +71,13 @@ def format_ports(instance):
     try:
         split_port(instance)
     except ValueError as e:
-        raise ValidationError(six.text_type(e))
+        raise ValidationError(str(e))
     return True
 
 
 @FormatChecker.cls_checks(format="expose", raises=ValidationError)
 def format_expose(instance):
-    if isinstance(instance, six.string_types):
+    if isinstance(instance, str):
         if not re.match(VALID_EXPOSE_FORMAT, instance):
             raise ValidationError(
                 "should be of the format 'PORT[/PROTOCOL]'")
@@ -91,7 +87,7 @@ def format_expose(instance):
 
 @FormatChecker.cls_checks("subnet_ip_address", raises=ValidationError)
 def format_subnet_ip_address(instance):
-    if isinstance(instance, six.string_types):
+    if isinstance(instance, str):
         if not re.match(VALID_REGEX_IPV4_CIDR, instance) and \
                 not re.match(VALID_REGEX_IPV6_CIDR, instance):
             raise ValidationError("should use the CIDR format")
@@ -138,7 +134,7 @@ def validate_config_section(filename, config, section):
                 type=anglicize_json_type(python_type_to_yaml_type(config))))
 
     for key, value in config.items():
-        if not isinstance(key, six.string_types):
+        if not isinstance(key, str):
             raise ConfigurationError(
                 "In file '{filename}', the {section} name {name} must be a "
                 "quoted string, i.e. '{name}'.".format(
@@ -166,7 +162,7 @@ def validate_top_level_object(config_file):
 
 def validate_ulimits(service_config):
     ulimit_config = service_config.config.get('ulimits', {})
-    for limit_name, soft_hard_values in six.iteritems(ulimit_config):
+    for limit_name, soft_hard_values in ulimit_config.items():
         if isinstance(soft_hard_values, dict):
             if not soft_hard_values['soft'] <= soft_hard_values['hard']:
                 raise ConfigurationError(
@@ -329,7 +325,7 @@ def handle_generic_error(error, path):
             required_keys)
 
     elif error.cause:
-        error_msg = six.text_type(error.cause)
+        error_msg = str(error.cause)
         msg_format = "{path} is invalid: {msg}"
 
     elif error.path:
@@ -349,7 +345,7 @@ def parse_key_from_error_msg(error):
 
 
 def path_string(path):
-    return ".".join(c for c in path if isinstance(c, six.string_types))
+    return ".".join(c for c in path if isinstance(c, str))
 
 
 def _parse_valid_types_from_validator(validator):
diff --git a/compose/const.py b/compose/const.py
index 3d9030520b0..d80e23c9ef8 100644
--- a/compose/const.py
+++ b/compose/const.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import sys
 
 from .version import ComposeVersion
diff --git a/compose/container.py b/compose/container.py
index 8a2fb240e0d..2571a6417b1 100644
--- a/compose/container.py
+++ b/compose/container.py
@@ -1,9 +1,5 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from functools import reduce
 
-import six
 from docker.errors import ImageNotFound
 
 from .const import LABEL_CONTAINER_NUMBER
@@ -16,7 +12,7 @@
 from .version import ComposeVersion
 
 
-class Container(object):
+class Container:
     """
     Represents a Docker container, constructed from the output of
     GET /containers/:id:/json.
@@ -130,7 +126,7 @@ def format_port(private, public):
 
         return ', '.join(
             ','.join(format_port(*item))
-            for item in sorted(six.iteritems(self.ports))
+            for item in sorted(self.ports.items())
         )
 
     @property
diff --git a/compose/errors.py b/compose/errors.py
index 415b41e7f04..44b6ba82150 100644
--- a/compose/errors.py
+++ b/compose/errors.py
@@ -1,5 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
 
 
 class OperationFailedError(Exception):
@@ -19,14 +17,14 @@ def __init__(self, reason):
 
 class HealthCheckFailed(HealthCheckException):
     def __init__(self, container_id):
-        super(HealthCheckFailed, self).__init__(
+        super().__init__(
             'Container "{}" is unhealthy.'.format(container_id)
         )
 
 
 class NoHealthCheckConfigured(HealthCheckException):
     def __init__(self, service_name):
-        super(NoHealthCheckConfigured, self).__init__(
+        super().__init__(
             'Service "{}" is missing a healthcheck configuration'.format(
                 service_name
             )
diff --git a/compose/network.py b/compose/network.py
index 84531ecc7b8..3541dab6894 100644
--- a/compose/network.py
+++ b/compose/network.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import re
 from collections import OrderedDict
@@ -27,7 +24,7 @@
 ]
 
 
-class Network(object):
+class Network:
     def __init__(self, client, project, name, driver=None, driver_opts=None,
                  ipam=None, external=False, internal=False, enable_ipv6=False,
                  labels=None, custom_name=False):
@@ -170,7 +167,7 @@ def create_ipam_config_from_dict(ipam_dict):
 
 class NetworkConfigChangedError(ConfigurationError):
     def __init__(self, net_name, property_name):
-        super(NetworkConfigChangedError, self).__init__(
+        super().__init__(
             'Network "{}" needs to be recreated - {} has changed'.format(
                 net_name, property_name
             )
@@ -261,7 +258,7 @@ def build_networks(name, config_data, client):
     return networks
 
 
-class ProjectNetworks(object):
+class ProjectNetworks:
 
     def __init__(self, networks, use_networking):
         self.networks = networks or {}
diff --git a/compose/parallel.py b/compose/parallel.py
index e242a318ae7..acf9e4a84cf 100644
--- a/compose/parallel.py
+++ b/compose/parallel.py
@@ -1,18 +1,15 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
+import _thread as thread
 import logging
 import operator
 import sys
+from queue import Empty
+from queue import Queue
 from threading import Lock
 from threading import Semaphore
 from threading import Thread
 
 from docker.errors import APIError
 from docker.errors import ImageNotFound
-from six.moves import _thread as thread
-from six.moves.queue import Empty
-from six.moves.queue import Queue
 
 from compose.cli.colors import green
 from compose.cli.colors import red
@@ -21,7 +18,6 @@
 from compose.errors import HealthCheckFailed
 from compose.errors import NoHealthCheckConfigured
 from compose.errors import OperationFailedError
-from compose.utils import get_output_stream
 
 
 log = logging.getLogger(__name__)
@@ -29,7 +25,7 @@
 STOP = object()
 
 
-class GlobalLimit(object):
+class GlobalLimit:
     """Simple class to hold a global semaphore limiter for a project. This class
     should be treated as a singleton that is instantiated when the project is.
     """
@@ -85,7 +81,7 @@ def parallel_execute(objects, func, get_name, msg, get_deps=None, limit=None, fa
         in the CLI logs, but don't raise an exception (such as attempting to start 0 containers)
     """
     objects = list(objects)
-    stream = get_output_stream(sys.stderr)
+    stream = sys.stderr
 
     if ParallelStreamWriter.instance:
         writer = ParallelStreamWriter.instance
@@ -118,7 +114,7 @@ def _no_deps(x):
     return []
 
 
-class State(object):
+class State:
     """
     Holds the state of a partially-complete parallel operation.
 
@@ -140,7 +136,7 @@ def pending(self):
         return set(self.objects) - self.started - self.finished - self.failed
 
 
-class NoLimit(object):
+class NoLimit:
     def __enter__(self):
         pass
 
@@ -256,7 +252,7 @@ class UpstreamError(Exception):
     pass
 
 
-class ParallelStreamWriter(object):
+class ParallelStreamWriter:
     """Write out messages for operations happening in parallel.
 
     Each operation has its own line, and ANSI code characters are used
diff --git a/compose/progress_stream.py b/compose/progress_stream.py
index 522ddf75d19..8792ff287cb 100644
--- a/compose/progress_stream.py
+++ b/compose/progress_stream.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose import utils
 
 
@@ -18,7 +15,7 @@ def write_to_stream(s, stream):
 
 def stream_output(output, stream):
     is_terminal = hasattr(stream, 'isatty') and stream.isatty()
-    stream = utils.get_output_stream(stream)
+    stream = stream
     lines = {}
     diff = 0
 
diff --git a/compose/project.py b/compose/project.py
index 696c8b04023..7e82fffbdac 100644
--- a/compose/project.py
+++ b/compose/project.py
@@ -1,15 +1,11 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import datetime
+import enum
 import logging
 import operator
 import re
 from functools import reduce
 from os import path
 
-import enum
-import six
 from docker.errors import APIError
 from docker.errors import ImageNotFound
 from docker.errors import NotFound
@@ -65,7 +61,7 @@ def update_labels(cls, value, labels):
             raise ValueError("Invalid value for one_off: {}".format(repr(value)))
 
 
-class Project(object):
+class Project:
     """
     A collection of services.
     """
@@ -394,7 +390,7 @@ def build_service(service):
             )
             if len(errors):
                 combined_errors = '\n'.join([
-                    e.decode('utf-8') if isinstance(e, six.binary_type) else e for e in errors.values()
+                    e.decode('utf-8') if isinstance(e, bytes) else e for e in errors.values()
                 ])
                 raise ProjectError(combined_errors)
 
@@ -684,7 +680,7 @@ def pull_service(service):
                         .format(' '.join(must_build)))
         if len(errors):
             combined_errors = '\n'.join([
-                e.decode('utf-8') if isinstance(e, six.binary_type) else e for e in errors.values()
+                e.decode('utf-8') if isinstance(e, bytes) else e for e in errors.values()
             ])
             raise ProjectError(combined_errors)
 
@@ -934,7 +930,7 @@ def __init__(self, image_name, service_name):
 
 class NoSuchService(Exception):
     def __init__(self, name):
-        if isinstance(name, six.binary_type):
+        if isinstance(name, bytes):
             name = name.decode('utf-8')
         self.name = name
         self.msg = "No such service: %s" % self.name
diff --git a/compose/service.py b/compose/service.py
index ebe237b8cfc..b8d1de1c7a4 100644
--- a/compose/service.py
+++ b/compose/service.py
@@ -1,19 +1,16 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
+import enum
 import itertools
 import json
 import logging
 import os
 import re
+import subprocess
 import sys
 import tempfile
 from collections import namedtuple
 from collections import OrderedDict
 from operator import attrgetter
 
-import enum
-import six
 from docker.errors import APIError
 from docker.errors import ImageNotFound
 from docker.errors import NotFound
@@ -62,11 +59,6 @@
 from .utils import unique_everseen
 from compose.cli.utils import binarystr_to_unicode
 
-if six.PY2:
-    import subprocess32 as subprocess
-else:
-    import subprocess
-
 log = logging.getLogger(__name__)
 
 HOST_CONFIG_KEYS = [
@@ -170,7 +162,7 @@ class BuildAction(enum.Enum):
     skip = 2
 
 
-class Service(object):
+class Service:
     def __init__(
             self,
             name,
@@ -425,7 +417,7 @@ def _containers_have_diverged(self, containers):
         except NoSuchImageError as e:
             log.debug(
                 'Service %s has diverged: %s',
-                self.name, six.text_type(e),
+                self.name, str(e),
             )
             return True
 
@@ -975,7 +967,7 @@ def _get_container_host_config(self, override_options, one_off=False):
         blkio_config = convert_blkio_config(options.get('blkio_config', None))
         log_config = get_log_config(logging_dict)
         init_path = None
-        if isinstance(options.get('init'), six.string_types):
+        if isinstance(options.get('init'), str):
             init_path = options.get('init')
             options['init'] = True
 
@@ -1109,7 +1101,7 @@ def build(self, no_cache=False, pull=False, force_rm=False, memory=None, build_a
         try:
             all_events = list(stream_output(build_output, output_stream))
         except StreamOutputError as e:
-            raise BuildError(self, six.text_type(e))
+            raise BuildError(self, str(e))
 
         # Ensure the HTTP connection is not reused for another
         # streaming command, as the Docker daemon can sometimes
@@ -1224,7 +1216,7 @@ def _do_pull(self, repo, pull_kwargs, silent, ignore_pull_failures):
             if not ignore_pull_failures:
                 raise
             else:
-                log.error(six.text_type(e))
+                log.error(str(e))
 
     def pull(self, ignore_pull_failures=False, silent=False, stream=False):
         if 'image' not in self.options:
@@ -1265,7 +1257,7 @@ def push(self, ignore_push_failures=False):
             if not ignore_push_failures:
                 raise
             else:
-                log.error(six.text_type(e))
+                log.error(str(e))
 
     def is_healthy(self):
         """ Check that all containers for this service report healthy.
@@ -1317,7 +1309,7 @@ def short_id_alias_exists(container, network):
     return container.short_id in aliases
 
 
-class PidMode(object):
+class PidMode:
     def __init__(self, mode):
         self._mode = mode
 
@@ -1357,7 +1349,7 @@ def __init__(self, container):
         self._mode = 'container:{}'.format(container.id)
 
 
-class NetworkMode(object):
+class NetworkMode:
     """A `standard` network mode (ex: host, bridge)"""
 
     service_name = None
@@ -1372,7 +1364,7 @@ def id(self):
     mode = id
 
 
-class ContainerNetworkMode(object):
+class ContainerNetworkMode:
     """A network mode that uses a container's network stack."""
 
     service_name = None
@@ -1389,7 +1381,7 @@ def mode(self):
         return 'container:' + self.container.id
 
 
-class ServiceNetworkMode(object):
+class ServiceNetworkMode:
     """A network mode that uses a service's network stack."""
 
     def __init__(self, service):
@@ -1631,8 +1623,8 @@ def build_ulimits(ulimit_config):
     if not ulimit_config:
         return None
     ulimits = []
-    for limit_name, soft_hard_values in six.iteritems(ulimit_config):
-        if isinstance(soft_hard_values, six.integer_types):
+    for limit_name, soft_hard_values in ulimit_config.items():
+        if isinstance(soft_hard_values, int):
             ulimits.append({'name': limit_name, 'soft': soft_hard_values, 'hard': soft_hard_values})
         elif isinstance(soft_hard_values, dict):
             ulimit_dict = {'name': limit_name}
@@ -1656,7 +1648,7 @@ def format_environment(environment):
     def format_env(key, value):
         if value is None:
             return key
-        if isinstance(value, six.binary_type):
+        if isinstance(value, bytes):
             value = value.decode('utf-8')
         return '{key}={value}'.format(key=key, value=value)
 
@@ -1707,18 +1699,13 @@ def convert_blkio_config(blkio_config):
 
 
 def rewrite_build_path(path):
-    # python2 os.stat() doesn't support unicode on some UNIX, so we
-    # encode it to a bytestring to be safe
-    if not six.PY3 and not IS_WINDOWS_PLATFORM:
-        path = path.encode('utf8')
-
     if IS_WINDOWS_PLATFORM and not is_url(path) and not path.startswith(WINDOWS_LONGPATH_PREFIX):
         path = WINDOWS_LONGPATH_PREFIX + os.path.normpath(path)
 
     return path
 
 
-class _CLIBuilder(object):
+class _CLIBuilder:
     def __init__(self, progress):
         self._progress = progress
 
@@ -1808,9 +1795,6 @@ def build(self, path, tag=None, quiet=False, fileobj=None,
                 line = p.stdout.readline()
                 if not line:
                     break
-                # Fix non ascii chars on Python2. To remove when #6890 is complete.
-                if six.PY2:
-                    magic_word = str(magic_word)
                 if line.startswith(magic_word):
                     appear = True
                 yield json.dumps({"stream": line})
@@ -1828,7 +1812,7 @@ def build(self, path, tag=None, quiet=False, fileobj=None,
             yield json.dumps({"stream": "{}{}\n".format(magic_word, image_id)})
 
 
-class _CommandBuilder(object):
+class _CommandBuilder:
     def __init__(self):
         self._args = ["docker", "build"]
 
diff --git a/compose/timeparse.py b/compose/timeparse.py
index 16ef8a6dc91..2b6077e8fc9 100644
--- a/compose/timeparse.py
+++ b/compose/timeparse.py
@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 '''
 timeparse.py
 (c) Will Roberts <wildwilhelm@gmail.com>  1 February, 2014
@@ -31,9 +30,6 @@
 # ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 # CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 # SOFTWARE.
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import re
 
 HOURS = r'(?P<hours>[\d.]+)h'
@@ -93,4 +89,4 @@ def timeparse(sval):
 
 
 def cast(value):
-    return int(value, 10) if value.isdigit() else float(value)
+    return int(value) if value.isdigit() else float(value)
diff --git a/compose/utils.py b/compose/utils.py
index a1e5e6435d8..09c272e7e89 100644
--- a/compose/utils.py
+++ b/compose/utils.py
@@ -1,14 +1,9 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
-import codecs
 import hashlib
 import json.decoder
 import logging
 import ntpath
 import random
 
-import six
 from docker.errors import DockerException
 from docker.utils import parse_bytes as sdk_parse_bytes
 
@@ -21,12 +16,6 @@
 log = logging.getLogger(__name__)
 
 
-def get_output_stream(stream):
-    if six.PY3:
-        return stream
-    return codecs.getwriter('utf-8')(stream)
-
-
 def stream_as_text(stream):
     """Given a stream of bytes or text, if any of the items in the stream
     are bytes convert them to text.
@@ -35,13 +24,13 @@ def stream_as_text(stream):
     of byte streams.
     """
     for data in stream:
-        if not isinstance(data, six.text_type):
+        if not isinstance(data, str):
             data = data.decode('utf-8', 'replace')
         yield data
 
 
 def line_splitter(buffer, separator=u'\n'):
-    index = buffer.find(six.text_type(separator))
+    index = buffer.find(str(separator))
     if index == -1:
         return None
     return buffer[:index + 1], buffer[index + 1:]
@@ -56,7 +45,7 @@ def split_buffer(stream, splitter=None, decoder=lambda a: a):
     of the input.
     """
     splitter = splitter or line_splitter
-    buffered = six.text_type('')
+    buffered = ''
 
     for data in stream_as_text(stream):
         buffered += data
diff --git a/compose/version.py b/compose/version.py
index 0532e16c717..c039263acb9 100644
--- a/compose/version.py
+++ b/compose/version.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from distutils.version import LooseVersion
 
 
diff --git a/compose/volume.py b/compose/volume.py
index b02fc5d8030..39e40382570 100644
--- a/compose/volume.py
+++ b/compose/volume.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 import re
 
@@ -18,7 +15,7 @@
 log = logging.getLogger(__name__)
 
 
-class Volume(object):
+class Volume:
     def __init__(self, client, project, name, driver=None, driver_opts=None,
                  external=False, labels=None, custom_name=False):
         self.client = client
@@ -99,7 +96,7 @@ def _set_legacy_flag(self):
             self.legacy = False
 
 
-class ProjectVolumes(object):
+class ProjectVolumes:
 
     def __init__(self, volumes):
         self.volumes = volumes
@@ -177,7 +174,7 @@ def namespace_spec(self, volume_spec):
 
 class VolumeConfigChangedError(ConfigurationError):
     def __init__(self, local, property_name, local_value, remote_value):
-        super(VolumeConfigChangedError, self).__init__(
+        super().__init__(
             'Configuration for volume {vol_name} specifies {property_name} '
             '{local_value}, but a volume with the same name uses a different '
             '{property_name} ({remote_value}). If you wish to use the new '
diff --git a/contrib/migration/migrate-compose-file-v1-to-v2.py b/contrib/migration/migrate-compose-file-v1-to-v2.py
index 274b499b9d4..e217b7072c3 100755
--- a/contrib/migration/migrate-compose-file-v1-to-v2.py
+++ b/contrib/migration/migrate-compose-file-v1-to-v2.py
@@ -3,9 +3,6 @@
 Migrate a Compose file from the V1 format in Compose 1.5 to the V2 format
 supported by Compose 1.6+
 """
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import argparse
 import logging
 import sys
diff --git a/docker-compose_darwin.spec b/docker-compose_darwin.spec
index 344c070d501..5937f881ae6 100644
--- a/docker-compose_darwin.spec
+++ b/docker-compose_darwin.spec
@@ -1,4 +1,4 @@
-# -*- mode: python ; coding: utf-8 -*-
+# -*- mode: python -*-
 
 block_cipher = None
 
diff --git a/requirements.txt b/requirements.txt
index b1bc694427f..d0b258d530d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 backports.shutil_get_terminal_size==1.0.0
-backports.ssl-match-hostname==3.5.0.1; python_version < '3'
 cached-property==1.5.1
 certifi==2019.11.28
 chardet==3.0.4
@@ -8,8 +7,6 @@ docker==4.2.0
 docker-pycreds==0.4.0
 dockerpty==0.4.1
 docopt==0.6.2
-enum34==1.1.6; python_version < '3.4'
-functools32==3.2.3.post2; python_version < '3.2'
 idna==2.8
 ipaddress==1.0.23
 jsonschema==3.2.0
@@ -20,8 +17,5 @@ PySocks==1.7.1
 python-dotenv==0.11.0
 PyYAML==5.3
 requests==2.22.0
-six==1.12.0
-subprocess32==3.5.4; python_version < '3.2'
 texttable==1.6.2
-urllib3==1.25.7; python_version == '3.3'
 websocket-client==0.57.0
diff --git a/script/release/const.py b/script/release/const.py
index 77a32332a7f..8c90eebca6e 100644
--- a/script/release/const.py
+++ b/script/release/const.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 
 
diff --git a/script/release/release.py b/script/release/release.py
index f53d1f3c181..c8e5e7f767d 100755
--- a/script/release/release.py
+++ b/script/release/release.py
@@ -1,7 +1,4 @@
 #!/usr/bin/env python3
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import re
 
 import click
diff --git a/script/release/utils.py b/script/release/utils.py
index 4f57704872b..25b39ca7497 100644
--- a/script/release/utils.py
+++ b/script/release/utils.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 import re
 
diff --git a/script/test/all b/script/test/all
index f929a57eecc..57b76d5a988 100755
--- a/script/test/all
+++ b/script/test/all
@@ -11,7 +11,7 @@ docker run --rm \
   "$TAG" tox -e pre-commit
 
 get_versions="docker run --rm
-    --entrypoint=/code/.tox/py27/bin/python
+    --entrypoint=/code/.tox/py37/bin/python
     $TAG
     /code/script/test/versions.py docker/docker-ce,moby/moby"
 
@@ -23,7 +23,7 @@ fi
 
 
 BUILD_NUMBER=${BUILD_NUMBER-$USER}
-PY_TEST_VERSIONS=${PY_TEST_VERSIONS:-py27,py37}
+PY_TEST_VERSIONS=${PY_TEST_VERSIONS:-py37}
 
 for version in $DOCKER_VERSIONS; do
   >&2 echo "Running tests against Docker $version"
diff --git a/script/test/versions.py b/script/test/versions.py
index a06c49f20b0..1a28dc19ad3 100755
--- a/script/test/versions.py
+++ b/script/test/versions.py
@@ -21,10 +21,6 @@
 `default` would return `1.7.1` and
 `recent -n 3` would return `1.8.0-rc2 1.7.1 1.6.2`
 """
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import argparse
 import itertools
 import operator
diff --git a/setup.py b/setup.py
index 548e2bc9398..0b106eee478 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import codecs
 import os
 import re
@@ -38,7 +33,6 @@ def find_version(*file_paths):
     'websocket-client >= 0.32.0, < 1',
     'docker[ssh] >= 3.7.0, < 5',
     'dockerpty >= 0.4.1, < 1',
-    'six >= 1.3.0, < 2',
     'jsonschema >= 2.5.1, < 4',
 ]
 
@@ -97,7 +91,7 @@ def find_version(*file_paths):
     install_requires=install_requires,
     extras_require=extras_require,
     tests_require=tests_require,
-    python_requires='>=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
+    python_requires='>=3.0, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*',
     entry_points={
         'console_scripts': ['docker-compose=compose.cli.main:main'],
     },
@@ -106,8 +100,6 @@ def find_version(*file_paths):
         'Environment :: Console',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: Apache Software License',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.6',
diff --git a/tests/__init__.py b/tests/__init__.py
index 1ac1b21cf74..9d732490098 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,14 +1,2 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
-import sys
-
-if sys.version_info >= (2, 7):
-    import unittest  # NOQA
-else:
-    import unittest2 as unittest  # NOQA
-
-try:
-    from unittest import mock
-except ImportError:
-    import mock  # NOQA
+import unittest  # NOQA
+from unittest import mock  # NOQA
diff --git a/tests/acceptance/cli_test.py b/tests/acceptance/cli_test.py
index 43d5a3f5ccc..a5e8a47bce0 100644
--- a/tests/acceptance/cli_test.py
+++ b/tests/acceptance/cli_test.py
@@ -1,7 +1,3 @@
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import datetime
 import json
 import os.path
@@ -15,7 +11,6 @@
 from operator import attrgetter
 
 import pytest
-import six
 import yaml
 from docker import errors
 
@@ -103,7 +98,7 @@ def kill_service(service):
             container.kill()
 
 
-class ContainerCountCondition(object):
+class ContainerCountCondition:
 
     def __init__(self, project, expected):
         self.project = project
@@ -116,7 +111,7 @@ def __str__(self):
         return "waiting for counter count == %s" % self.expected
 
 
-class ContainerStateCondition(object):
+class ContainerStateCondition:
 
     def __init__(self, client, name, status):
         self.client = client
@@ -144,7 +139,7 @@ def __str__(self):
 class CLITestCase(DockerClientTestCase):
 
     def setUp(self):
-        super(CLITestCase, self).setUp()
+        super().setUp()
         self.base_dir = 'tests/fixtures/simple-composefile'
         self.override_dir = None
 
@@ -166,7 +161,7 @@ def tearDown(self):
         if hasattr(self, '_project'):
             del self._project
 
-        super(CLITestCase, self).tearDown()
+        super().tearDown()
 
     @property
     def project(self):
@@ -2220,15 +2215,9 @@ def test_run_handles_sighup(self):
     @mock.patch.dict(os.environ)
     def test_run_unicode_env_values_from_system(self):
         value = 'ą, ć, ę, ł, ń, ó, ś, ź, ż'
-        if six.PY2:  # os.environ doesn't support unicode values in Py2
-            os.environ['BAR'] = value.encode('utf-8')
-        else:  # ... and doesn't support byte values in Py3
-            os.environ['BAR'] = value
+        os.environ['BAR'] = value
         self.base_dir = 'tests/fixtures/unicode-environment'
-        result = self.dispatch(['run', 'simple'])
-
-        if six.PY2:  # Can't retrieve output on Py3. See issue #3670
-            assert value in result.stdout.strip()
+        self.dispatch(['run', 'simple'])
 
         container = self.project.containers(one_off=OneOffFilter.only, stopped=True)[0]
         environment = container.get('Config.Env')
diff --git a/tests/acceptance/context_test.py b/tests/acceptance/context_test.py
index 1d79a22a042..a5d0c14730f 100644
--- a/tests/acceptance/context_test.py
+++ b/tests/acceptance/context_test.py
@@ -1,7 +1,3 @@
-# -*- coding: utf-8 -*-
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 import shutil
 import unittest
diff --git a/tests/helpers.py b/tests/helpers.py
index 1365c5bcfb3..d178684853b 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import contextlib
 import os
 
diff --git a/tests/integration/environment_test.py b/tests/integration/environment_test.py
index 671e65318a6..43df2c52b03 100644
--- a/tests/integration/environment_test.py
+++ b/tests/integration/environment_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import tempfile
 
 from ddt import data
diff --git a/tests/integration/network_test.py b/tests/integration/network_test.py
index a2493fda1a2..23c9e9a4bda 100644
--- a/tests/integration/network_test.py
+++ b/tests/integration/network_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from .testcases import DockerClientTestCase
diff --git a/tests/integration/project_test.py b/tests/integration/project_test.py
index cb620a8c972..19d27185c9b 100644
--- a/tests/integration/project_test.py
+++ b/tests/integration/project_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import copy
 import json
 import os
diff --git a/tests/integration/resilience_test.py b/tests/integration/resilience_test.py
index 3de16e977b8..2fbaafb2894 100644
--- a/tests/integration/resilience_test.py
+++ b/tests/integration/resilience_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from .. import mock
@@ -25,7 +22,7 @@ def setUp(self):
     def tearDown(self):
         del self.project
         del self.db
-        super(ResilienceTest, self).tearDown()
+        super().tearDown()
 
     def test_successful_recreate(self):
         self.project.up(strategy=ConvergenceStrategy.always)
diff --git a/tests/integration/service_test.py b/tests/integration/service_test.py
index c50aab08bb2..0b81e384e6e 100644
--- a/tests/integration/service_test.py
+++ b/tests/integration/service_test.py
@@ -1,18 +1,14 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 import re
 import shutil
 import tempfile
 from distutils.spawn import find_executable
+from io import StringIO
 from os import path
 
 import pytest
 from docker.errors import APIError
 from docker.errors import ImageNotFound
-from six import StringIO
-from six import text_type
 
 from .. import mock
 from ..helpers import BUSYBOX_IMAGE_WITH_TAG
@@ -1015,7 +1011,7 @@ def test_build_non_ascii_filename(self):
         with open(os.path.join(base_dir.encode('utf8'), b'foo\xE2bar'), 'w') as f:
             f.write("hello world\n")
 
-        service = self.create_service('web', build={'context': text_type(base_dir)})
+        service = self.create_service('web', build={'context': str(base_dir)})
         service.build()
         self.addCleanup(self.client.remove_image, service.image_name)
         assert self.client.inspect_image('composetest_web')
@@ -1049,7 +1045,7 @@ def test_build_with_build_args(self):
             f.write("RUN echo ${build_version}\n")
 
         service = self.create_service('buildwithargs',
-                                      build={'context': text_type(base_dir),
+                                      build={'context': str(base_dir),
                                              'args': {"build_version": "1"}})
         service.build()
         self.addCleanup(self.client.remove_image, service.image_name)
@@ -1066,7 +1062,7 @@ def test_build_with_build_args_override(self):
             f.write("RUN echo ${build_version}\n")
 
         service = self.create_service('buildwithargs',
-                                      build={'context': text_type(base_dir),
+                                      build={'context': str(base_dir),
                                              'args': {"build_version": "1"}})
         service.build(build_args_override={'build_version': '2'})
         self.addCleanup(self.client.remove_image, service.image_name)
@@ -1082,7 +1078,7 @@ def test_build_with_build_labels(self):
             f.write('FROM busybox\n')
 
         service = self.create_service('buildlabels', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
             'labels': {'com.docker.compose.test': 'true'}
         })
         service.build()
@@ -1109,7 +1105,7 @@ def test_build_with_network(self):
         self.client.start(net_container)
 
         service = self.create_service('buildwithnet', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
             'network': 'container:{}'.format(net_container['Id'])
         })
 
@@ -1133,7 +1129,7 @@ def test_build_with_target(self):
             f.write('LABEL com.docker.compose.test.target=two\n')
 
         service = self.create_service('buildtarget', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
             'target': 'one'
         })
 
@@ -1155,7 +1151,7 @@ def test_build_with_extra_hosts(self):
             ]))
 
         service = self.create_service('build_extra_hosts', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
             'extra_hosts': {
                 'foobar': '127.0.0.1',
                 'baz': '127.0.0.1'
@@ -1177,7 +1173,7 @@ def test_build_with_gzip(self):
             f.write('hello world\n')
 
         service = self.create_service('build_gzip', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
         })
         service.build(gzip=True)
         assert service.image()
@@ -1190,7 +1186,7 @@ def test_build_with_isolation(self):
             f.write('FROM busybox\n')
 
         service = self.create_service('build_isolation', build={
-            'context': text_type(base_dir),
+            'context': str(base_dir),
             'isolation': 'default',
         })
         service.build()
@@ -1204,7 +1200,7 @@ def test_build_with_illegal_leading_chars(self):
         service = Service(
             'build_leading_slug', client=self.client,
             project='___-composetest', build={
-                'context': text_type(base_dir)
+                'context': str(base_dir)
             }
         )
         assert service.image_name == 'composetest_build_leading_slug'
diff --git a/tests/integration/state_test.py b/tests/integration/state_test.py
index 492de7b8ab1..2eb5d61f1c6 100644
--- a/tests/integration/state_test.py
+++ b/tests/integration/state_test.py
@@ -2,9 +2,6 @@
 Integration tests which cover state convergence (aka smart recreate) performed
 by `docker-compose up`.
 """
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import copy
 import os
 import shutil
@@ -42,7 +39,7 @@ def make_project(self, cfg):
 
 class BasicProjectTest(ProjectTestCase):
     def setUp(self):
-        super(BasicProjectTest, self).setUp()
+        super().setUp()
 
         self.cfg = {
             'db': {'image': BUSYBOX_IMAGE_WITH_TAG, 'command': 'top'},
@@ -98,7 +95,7 @@ def test_all_change(self):
 
 class ProjectWithDependenciesTest(ProjectTestCase):
     def setUp(self):
-        super(ProjectWithDependenciesTest, self).setUp()
+        super().setUp()
 
         self.cfg = {
             'db': {
@@ -216,7 +213,7 @@ def test_service_recreated_when_dependency_created(self):
 
 class ProjectWithDependsOnDependenciesTest(ProjectTestCase):
     def setUp(self):
-        super(ProjectWithDependsOnDependenciesTest, self).setUp()
+        super().setUp()
 
         self.cfg = {
             'version': '2',
diff --git a/tests/integration/testcases.py b/tests/integration/testcases.py
index fe70d1f7246..f787923adde 100644
--- a/tests/integration/testcases.py
+++ b/tests/integration/testcases.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import functools
 import os
 
diff --git a/tests/integration/volume_test.py b/tests/integration/volume_test.py
index 2a521d4c5b1..0e7c78bc25a 100644
--- a/tests/integration/volume_test.py
+++ b/tests/integration/volume_test.py
@@ -1,7 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
-import six
 from docker.errors import DockerException
 
 from .testcases import DockerClientTestCase
@@ -22,12 +18,12 @@ def tearDown(self):
             except DockerException:
                 pass
         del self.tmp_volumes
-        super(VolumeTest, self).tearDown()
+        super().tearDown()
 
     def create_volume(self, name, driver=None, opts=None, external=None, custom_name=False):
         if external:
             custom_name = True
-            if isinstance(external, six.text_type):
+            if isinstance(external, str):
                 name = external
 
         vol = Volume(
diff --git a/tests/unit/cli/command_test.py b/tests/unit/cli/command_test.py
index 3a9844c4f7c..9d4db5b59a8 100644
--- a/tests/unit/cli/command_test.py
+++ b/tests/unit/cli/command_test.py
@@ -1,11 +1,6 @@
-# ~*~ encoding: utf-8 ~*~
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 
 import pytest
-import six
 
 from compose.cli.command import get_config_path_from_options
 from compose.config.environment import Environment
@@ -13,7 +8,7 @@
 from tests import mock
 
 
-class TestGetConfigPathFromOptions(object):
+class TestGetConfigPathFromOptions:
 
     def test_path_from_options(self):
         paths = ['one.yml', 'two.yml']
@@ -65,12 +60,3 @@ def test_unicode_path_from_options(self):
         assert get_config_path_from_options(
             '.', opts, environment
         ) == ['就吃饭/docker-compose.yml']
-
-    @pytest.mark.skipif(six.PY3, reason='Env values in Python 3 are already Unicode')
-    def test_unicode_path_from_env(self):
-        with mock.patch.dict(os.environ):
-            os.environ['COMPOSE_FILE'] = b'\xe5\xb0\xb1\xe5\x90\x83\xe9\xa5\xad/docker-compose.yml'
-            environment = Environment.from_env_file('.')
-            assert get_config_path_from_options(
-                '.', {}, environment
-            ) == ['就吃饭/docker-compose.yml']
diff --git a/tests/unit/cli/docker_client_test.py b/tests/unit/cli/docker_client_test.py
index 772c136eefd..41a50377cc2 100644
--- a/tests/unit/cli/docker_client_test.py
+++ b/tests/unit/cli/docker_client_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 import platform
 import ssl
@@ -233,7 +230,7 @@ def test_tls_verify_default_cert_path(self):
         assert result.cert == (self.client_cert, self.key)
 
 
-class TestGetTlsVersion(object):
+class TestGetTlsVersion:
     def test_get_tls_version_default(self):
         environment = {}
         assert get_tls_version(environment) is None
diff --git a/tests/unit/cli/errors_test.py b/tests/unit/cli/errors_test.py
index 7b53ed2b15f..740ae33739b 100644
--- a/tests/unit/cli/errors_test.py
+++ b/tests/unit/cli/errors_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 from docker.errors import APIError
 from requests.exceptions import ConnectionError
@@ -24,7 +21,7 @@ def patch_find_executable(side_effect):
         side_effect=side_effect)
 
 
-class TestHandleConnectionErrors(object):
+class TestHandleConnectionErrors:
 
     def test_generic_connection_error(self, mock_logging):
         with pytest.raises(errors.ConnectionError):
diff --git a/tests/unit/cli/formatter_test.py b/tests/unit/cli/formatter_test.py
index e685725112f..07f5a8f50c5 100644
--- a/tests/unit/cli/formatter_test.py
+++ b/tests/unit/cli/formatter_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 
 from compose.cli import colors
diff --git a/tests/unit/cli/log_printer_test.py b/tests/unit/cli/log_printer_test.py
index 5e387241d67..d970cda2058 100644
--- a/tests/unit/cli/log_printer_test.py
+++ b/tests/unit/cli/log_printer_test.py
@@ -1,13 +1,10 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import itertools
+from io import StringIO
+from queue import Queue
 
 import pytest
 import requests
-import six
 from docker.errors import APIError
-from six.moves.queue import Queue
 
 from compose.cli.log_printer import build_log_generator
 from compose.cli.log_printer import build_log_presenters
@@ -22,7 +19,7 @@
 
 @pytest.fixture
 def output_stream():
-    output = six.StringIO()
+    output = StringIO()
     output.flush = mock.Mock()
     return output
 
@@ -32,7 +29,7 @@ def mock_container():
     return mock.Mock(spec=Container, name_without_project='web_1')
 
 
-class TestLogPresenter(object):
+class TestLogPresenter:
 
     def test_monochrome(self, mock_container):
         presenters = build_log_presenters(['foo', 'bar'], True)
@@ -86,7 +83,7 @@ def test_build_no_log_generator(mock_container):
     assert "exited with code" not in output
 
 
-class TestBuildLogGenerator(object):
+class TestBuildLogGenerator:
 
     def test_no_log_stream(self, mock_container):
         mock_container.log_stream = None
@@ -128,7 +125,7 @@ def mock_presenters():
     return itertools.cycle([mock.Mock()])
 
 
-class TestWatchEvents(object):
+class TestWatchEvents:
 
     def test_stop_event(self, thread_map, mock_presenters):
         event_stream = [{'action': 'stop', 'id': 'cid'}]
@@ -170,7 +167,7 @@ def test_other_event(self, thread_map, mock_presenters):
         assert container_id not in thread_map
 
 
-class TestConsumeQueue(object):
+class TestConsumeQueue:
 
     def test_item_is_an_exception(self):
 
diff --git a/tests/unit/cli/main_test.py b/tests/unit/cli/main_test.py
index 067c74f0b0e..b023f779f1d 100644
--- a/tests/unit/cli/main_test.py
+++ b/tests/unit/cli/main_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import logging
 
 import docker
@@ -35,7 +32,7 @@ def logging_handler():
     return logging.StreamHandler(stream=stream)
 
 
-class TestCLIMainTestCase(object):
+class TestCLIMainTestCase:
 
     def test_filter_attached_containers(self):
         containers = [
@@ -138,7 +135,7 @@ def test_get_docker_start_call(self):
         assert expected_docker_start_call == docker_start_call
 
 
-class TestSetupConsoleHandlerTestCase(object):
+class TestSetupConsoleHandlerTestCase:
 
     def test_with_tty_verbose(self, logging_handler):
         setup_console_handler(logging_handler, True)
@@ -158,7 +155,7 @@ def test_with_not_a_tty(self, logging_handler):
         assert type(logging_handler.formatter) == logging.Formatter
 
 
-class TestConvergeStrategyFromOptsTestCase(object):
+class TestConvergeStrategyFromOptsTestCase:
 
     def test_invalid_opts(self):
         options = {'--force-recreate': True, '--no-recreate': True}
@@ -192,7 +189,7 @@ def mock_find_executable(exe):
 
 
 @mock.patch('compose.cli.main.find_executable', mock_find_executable)
-class TestCallDocker(object):
+class TestCallDocker:
     def test_simple_no_options(self):
         with mock.patch('subprocess.call') as fake_call:
             call_docker(['ps'], {}, {})
diff --git a/tests/unit/cli/utils_test.py b/tests/unit/cli/utils_test.py
index 7a762890370..d67c8ba8aff 100644
--- a/tests/unit/cli/utils_test.py
+++ b/tests/unit/cli/utils_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import unittest
 
 from compose.cli.utils import human_readable_file_size
diff --git a/tests/unit/cli/verbose_proxy_test.py b/tests/unit/cli/verbose_proxy_test.py
index f111f8cdbf2..884e3901d35 100644
--- a/tests/unit/cli/verbose_proxy_test.py
+++ b/tests/unit/cli/verbose_proxy_test.py
@@ -1,8 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
-import six
-
 from compose.cli import verbose_proxy
 from tests import unittest
 
@@ -10,7 +5,7 @@
 class VerboseProxyTestCase(unittest.TestCase):
 
     def test_format_call(self):
-        prefix = '' if six.PY3 else 'u'
+        prefix = '' if True else 'u'
         expected = "(%(p)s'arg1', True, key=%(p)s'value')" % dict(p=prefix)
         actual = verbose_proxy.format_call(
             ("arg1", True),
diff --git a/tests/unit/cli_test.py b/tests/unit/cli_test.py
index a7522f939b9..4e5b74843f5 100644
--- a/tests/unit/cli_test.py
+++ b/tests/unit/cli_test.py
@@ -1,7 +1,3 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import os
 import shutil
 import tempfile
diff --git a/tests/unit/config/config_test.py b/tests/unit/config/config_test.py
index 603eddaf244..b03d3b60ff8 100644
--- a/tests/unit/config/config_test.py
+++ b/tests/unit/config/config_test.py
@@ -1,8 +1,3 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import codecs
 import os
 import shutil
@@ -3836,7 +3831,7 @@ def test_volume_path_with_non_ascii_directory(self):
         assert container_path == volume
 
 
-class MergePathMappingTest(object):
+class MergePathMappingTest:
     config_name = ""
 
     def test_empty(self):
@@ -3909,7 +3904,7 @@ def test_merge_build_or_image_override_with_other(self):
         assert config.merge_service_dicts({'image': 'redis'}, {'build': '.'}, V1) == {'build': '.'}
 
 
-class MergeListsTest(object):
+class MergeListsTest:
     config_name = ""
     base_config = []
     override_config = []
diff --git a/tests/unit/config/environment_test.py b/tests/unit/config/environment_test.py
index 7e394d248f5..6a80ff12254 100644
--- a/tests/unit/config/environment_test.py
+++ b/tests/unit/config/environment_test.py
@@ -1,8 +1,3 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import print_function
-from __future__ import unicode_literals
-
 import codecs
 import os
 import shutil
diff --git a/tests/unit/config/interpolation_test.py b/tests/unit/config/interpolation_test.py
index 91fc3e69db5..b8b4ba74759 100644
--- a/tests/unit/config/interpolation_test.py
+++ b/tests/unit/config/interpolation_test.py
@@ -1,7 +1,3 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from compose.config.environment import Environment
diff --git a/tests/unit/config/sort_services_test.py b/tests/unit/config/sort_services_test.py
index c39ac022562..508c4bba190 100644
--- a/tests/unit/config/sort_services_test.py
+++ b/tests/unit/config/sort_services_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from compose.config.errors import DependencyError
@@ -8,7 +5,7 @@
 from compose.config.types import VolumeFromSpec
 
 
-class TestSortService(object):
+class TestSortService:
     def test_sort_service_dicts_1(self):
         services = [
             {
diff --git a/tests/unit/config/types_test.py b/tests/unit/config/types_test.py
index e7cc67b0422..acb8122e6d9 100644
--- a/tests/unit/config/types_test.py
+++ b/tests/unit/config/types_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from compose.config.errors import ConfigurationError
@@ -42,7 +39,7 @@ def test_parse_extra_hosts_dict():
     }
 
 
-class TestServicePort(object):
+class TestServicePort:
     def test_parse_dict(self):
         data = {
             'target': 8000,
@@ -132,7 +129,7 @@ def test_parse_invalid_publish_range(self):
             ServicePort.parse(port_def)
 
 
-class TestVolumeSpec(object):
+class TestVolumeSpec:
 
     def test_parse_volume_spec_only_one_path(self):
         spec = VolumeSpec.parse('/the/volume')
@@ -219,7 +216,7 @@ def test_parse_volume_windows_mixed_notations_native(self):
         )
 
 
-class TestVolumesFromSpec(object):
+class TestVolumesFromSpec:
 
     services = ['servicea', 'serviceb']
 
diff --git a/tests/unit/container_test.py b/tests/unit/container_test.py
index 626b466d4b3..452475209c5 100644
--- a/tests/unit/container_test.py
+++ b/tests/unit/container_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import docker
 
 from .. import mock
diff --git a/tests/unit/network_test.py b/tests/unit/network_test.py
index b829de196be..ab7ad59cfbd 100644
--- a/tests/unit/network_test.py
+++ b/tests/unit/network_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import pytest
 
 from .. import mock
diff --git a/tests/unit/parallel_test.py b/tests/unit/parallel_test.py
index 0735bfccb48..98412f9a259 100644
--- a/tests/unit/parallel_test.py
+++ b/tests/unit/parallel_test.py
@@ -1,10 +1,6 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import unittest
 from threading import Lock
 
-import six
 from docker.errors import APIError
 
 from compose.parallel import GlobalLimit
@@ -39,7 +35,7 @@ def test_parallel_execute(self):
         results, errors = parallel_execute(
             objects=[1, 2, 3, 4, 5],
             func=lambda x: x * 2,
-            get_name=six.text_type,
+            get_name=str,
             msg="Doubling",
         )
 
@@ -61,7 +57,7 @@ def f(obj):
         results, errors = parallel_execute(
             objects=list(range(tasks)),
             func=f,
-            get_name=six.text_type,
+            get_name=str,
             msg="Testing",
             limit=limit,
         )
@@ -85,7 +81,7 @@ def f(obj):
         results, errors = parallel_execute(
             objects=list(range(tasks)),
             func=f,
-            get_name=six.text_type,
+            get_name=str,
             msg="Testing",
         )
 
@@ -147,7 +143,7 @@ def test_parallel_execute_alignment(capsys):
     results, errors = parallel_execute(
         objects=["short", "a very long name"],
         func=lambda x: x,
-        get_name=six.text_type,
+        get_name=str,
         msg="Aligning",
     )
 
@@ -164,7 +160,7 @@ def test_parallel_execute_ansi(capsys):
     results, errors = parallel_execute(
         objects=["something", "something more"],
         func=lambda x: x,
-        get_name=six.text_type,
+        get_name=str,
         msg="Control characters",
     )
 
@@ -180,7 +176,7 @@ def test_parallel_execute_noansi(capsys):
     results, errors = parallel_execute(
         objects=["something", "something more"],
         func=lambda x: x,
-        get_name=six.text_type,
+        get_name=str,
         msg="Control characters",
     )
 
diff --git a/tests/unit/progress_stream_test.py b/tests/unit/progress_stream_test.py
index 6fdb7d92788..b1365fa928c 100644
--- a/tests/unit/progress_stream_test.py
+++ b/tests/unit/progress_stream_test.py
@@ -1,14 +1,9 @@
-# ~*~ encoding: utf-8 ~*~
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import io
 import os
 import random
 import shutil
 import tempfile
-
-from six import StringIO
+from io import StringIO
 
 from compose import progress_stream
 from tests import unittest
diff --git a/tests/unit/project_test.py b/tests/unit/project_test.py
index 6391fac863d..5f27cbe7501 100644
--- a/tests/unit/project_test.py
+++ b/tests/unit/project_test.py
@@ -1,7 +1,3 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import datetime
 import os
 import tempfile
diff --git a/tests/unit/service_test.py b/tests/unit/service_test.py
index 592e22f759f..d4e7f3c5d94 100644
--- a/tests/unit/service_test.py
+++ b/tests/unit/service_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import docker
 import pytest
 from docker.constants import DEFAULT_DOCKER_API_VERSION
diff --git a/tests/unit/split_buffer_test.py b/tests/unit/split_buffer_test.py
index dedd4ee36bb..f1974c83144 100644
--- a/tests/unit/split_buffer_test.py
+++ b/tests/unit/split_buffer_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from .. import unittest
 from compose.utils import split_buffer
 
diff --git a/tests/unit/timeparse_test.py b/tests/unit/timeparse_test.py
index 9915932c300..e56595f1893 100644
--- a/tests/unit/timeparse_test.py
+++ b/tests/unit/timeparse_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose import timeparse
 
 
diff --git a/tests/unit/utils_test.py b/tests/unit/utils_test.py
index 21b88d962c1..f02dcd696cc 100644
--- a/tests/unit/utils_test.py
+++ b/tests/unit/utils_test.py
@@ -1,11 +1,7 @@
-# encoding: utf-8
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 from compose import utils
 
 
-class TestJsonSplitter(object):
+class TestJsonSplitter:
 
     def test_json_splitter_no_object(self):
         data = '{"foo": "bar'
@@ -20,7 +16,7 @@ def test_json_splitter_leading_whitespace(self):
         assert utils.json_splitter(data) == ({'foo': 'bar'}, '{"next": "obj"}')
 
 
-class TestStreamAsText(object):
+class TestStreamAsText:
 
     def test_stream_with_non_utf_unicode_character(self):
         stream = [b'\xed\xf3\xf3']
@@ -33,7 +29,7 @@ def test_stream_with_utf_character(self):
         assert output == 'ěĝ'
 
 
-class TestJsonStream(object):
+class TestJsonStream:
 
     def test_with_falsy_entries(self):
         stream = [
@@ -62,7 +58,7 @@ def test_with_leading_whitespace(self):
         ]
 
 
-class TestParseBytes(object):
+class TestParseBytes:
     def test_parse_bytes(self):
         assert utils.parse_bytes('123kb') == 123 * 1024
         assert utils.parse_bytes(123) == 123
@@ -70,7 +66,7 @@ def test_parse_bytes(self):
         assert utils.parse_bytes('123') == 123
 
 
-class TestMoreItertools(object):
+class TestMoreItertools:
     def test_unique_everseen(self):
         unique = utils.unique_everseen
         assert list(unique([2, 1, 2, 1])) == [2, 1]
diff --git a/tests/unit/volume_test.py b/tests/unit/volume_test.py
index 457d8558174..0dfbfcd40b7 100644
--- a/tests/unit/volume_test.py
+++ b/tests/unit/volume_test.py
@@ -1,6 +1,3 @@
-from __future__ import absolute_import
-from __future__ import unicode_literals
-
 import docker
 import pytest
 
@@ -13,7 +10,7 @@ def mock_client():
     return mock.create_autospec(docker.APIClient)
 
 
-class TestVolume(object):
+class TestVolume:
 
     def test_remove_local_volume(self, mock_client):
         vol = volume.Volume(mock_client, 'foo', 'project')
diff --git a/tox.ini b/tox.ini
index 57e57bc635e..90f6e6888fb 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27,py37,pre-commit
+envlist = py37,pre-commit
 
 [testenv]
 usedevelop=True