diff --git a/httpie/cli/definition.py b/httpie/cli/definition.py
index e0a53b27..28ca35ea 100644
--- a/httpie/cli/definition.py
+++ b/httpie/cli/definition.py
@@ -709,7 +709,7 @@ ssl.add_argument(
 ssl.add_argument(
     '--ssl',
     dest='ssl_version',
-    choices=list(sorted(AVAILABLE_SSL_VERSION_ARG_MAPPING.keys())),
+    choices=sorted(AVAILABLE_SSL_VERSION_ARG_MAPPING.keys()),
     help='''
     The desired protocol version to use. This will default to
     SSL v2.3 which will negotiate the highest protocol that both
diff --git a/httpie/config.py b/httpie/config.py
index 5187da7e..ec4ad301 100644
--- a/httpie/config.py
+++ b/httpie/config.py
@@ -1,4 +1,3 @@
-import errno
 import json
 import os
 from pathlib import Path
diff --git a/setup.cfg b/setup.cfg
index 5640d04f..8301c1db 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,7 +17,13 @@ addopts = --tb=native --doctest-modules
 exclude = .git,.idea,__pycache__,build,dist,.pytest_cache,*.egg-info
 
 # <http://pycodestyle.pycqa.org/en/latest/intro.html#error-codes>
-# E241 - multiple spaces after ','
 # E501 - line too long
 # W503 - line break before binary operator
-ignore = E241,E501,W503
+ignore = E501,W503
+
+
+[flake8]
+# <https://flake8.pycqa.org/en/latest/user/error-codes.html>
+# E501 - line too long
+# W503 - line break before binary operator
+ignore = E501,W503
diff --git a/setup.py b/setup.py
index ca253fb8..9058c281 100644
--- a/setup.py
+++ b/setup.py
@@ -59,7 +59,7 @@ if 'bdist_wheel' not in sys.argv:
 
 # bdist_wheel
 extras_require = {
-    'test':  tests_require,
+    'test': tests_require,
     # https://wheel.readthedocs.io/en/latest/#defining-conditional-dependencies
     ':sys_platform == "win32"': install_requires_win_only,
 }
diff --git a/tests/test_docs.py b/tests/test_docs.py
index b39d87c8..480fcdef 100644
--- a/tests/test_docs.py
+++ b/tests/test_docs.py
@@ -18,7 +18,7 @@ SOURCE_DIRECTORIES = [
 def has_docutils():
     try:
         # noinspection PyUnresolvedReferences,PyPackageRequirements
-        import docutils
+        import docutils  # noqa
         return True
     except ImportError:
         return False
@@ -35,7 +35,7 @@ def rst_filenames():
         os.chdir(cwd)
 
 
-filenames = list(sorted(rst_filenames()))
+filenames = sorted(rst_filenames())
 assert filenames
 
 
diff --git a/tests/test_httpie.py b/tests/test_httpie.py
index 42adbb50..7df4d478 100644
--- a/tests/test_httpie.py
+++ b/tests/test_httpie.py
@@ -130,7 +130,7 @@ def test_form_POST_file_redirected_stdin(httpbin):
     <https://github.com/httpie/httpie/issues/840>
 
     """
-    with open(FILE_PATH) as f:
+    with open(FILE_PATH):
         r = http(
             '--form',
             'POST',
diff --git a/tests/test_output.py b/tests/test_output.py
index a9edbf4c..825d59a8 100644
--- a/tests/test_output.py
+++ b/tests/test_output.py
@@ -4,7 +4,6 @@ from unittest import mock
 
 import json
 import os
-import tempfile
 import io
 from urllib.request import urlopen
 
diff --git a/tests/test_sessions.py b/tests/test_sessions.py
index eaa923ef..8bd4d479 100644
--- a/tests/test_sessions.py
+++ b/tests/test_sessions.py
@@ -479,7 +479,7 @@ class TestCookieStorage(CookieTestBase):
         2. command line arg
         3. cookie already stored in session file
         """
-        r = http(
+        http(
             '--session', str(self.session_path),
             httpbin.url + set_cookie,
             'Cookie:' + cli_cookie,
diff --git a/tests/test_windows.py b/tests/test_windows.py
index 9354cb83..b30c7a50 100644
--- a/tests/test_windows.py
+++ b/tests/test_windows.py
@@ -1,6 +1,3 @@
-import os
-import tempfile
-
 import pytest
 from httpie.context import Environment
 
diff --git a/tests/utils/matching/test_matching.py b/tests/utils/matching/test_matching.py
index e74e126d..649884aa 100644
--- a/tests/utils/matching/test_matching.py
+++ b/tests/utils/matching/test_matching.py
@@ -69,19 +69,19 @@ def test_assert_output_matches_body_and_separator():
 
 
 def test_assert_output_matches_body_r():
-    assert_output_matches(f'AAA\r', [Expect.BODY])
+    assert_output_matches('AAA\r', [Expect.BODY])
 
 
 def test_assert_output_matches_body_n():
-    assert_output_matches(f'AAA\n', [Expect.BODY])
+    assert_output_matches('AAA\n', [Expect.BODY])
 
 
 def test_assert_output_matches_body_r_body():
-    assert_output_matches(f'AAA\rBBB', [Expect.BODY])
+    assert_output_matches('AAA\rBBB', [Expect.BODY])
 
 
 def test_assert_output_matches_body_n_body():
-    assert_output_matches(f'AAA\nBBB', [Expect.BODY])
+    assert_output_matches('AAA\nBBB', [Expect.BODY])
 
 
 def test_assert_output_matches_headers_and_body():