Switch from flake8 to ruff (#7920)

It's more than 60x faster.

116 files changed, 133 insertions, 247 deletions

diff --git a/.github/workflows/download_openssl.py b/.github/workflows/download_openssl.py
index 0e6f66286..3be39084b 100644
--- a/.github/workflows/download_openssl.py
+++ b/.github/workflows/download_openssl.py
@@ -9,7 +9,6 @@ import time
 import zipfile
 
 import requests
-
 from urllib3.util.retry import Retry
 
 
diff --git a/docs/_ext/cryptography-docs.py b/docs/_ext/cryptography-docs.py
index 1131f6a0e..43a9c6cb8 100644
--- a/docs/_ext/cryptography-docs.py
+++ b/docs/_ext/cryptography-docs.py
@@ -5,7 +5,6 @@
 from docutils import nodes
 from docutils.parsers.rst import Directive
 
-
 DANGER_MESSAGE = """
 This is a "Hazardous Materials" module. You should **ONLY** use it if you're
 100% absolutely sure that you know what you're doing because this module is
diff --git a/docs/development/custom-vectors/arc4/generate_arc4.py b/docs/development/custom-vectors/arc4/generate_arc4.py
index 14a99d050..504d19643 100644
--- a/docs/development/custom-vectors/arc4/generate_arc4.py
+++ b/docs/development/custom-vectors/arc4/generate_arc4.py
@@ -7,7 +7,6 @@ import binascii
 from cryptography.hazmat.primitives import ciphers
 from cryptography.hazmat.primitives.ciphers import algorithms
 
-
 _RFC6229_KEY_MATERIALS = [
     (
         True,
diff --git a/docs/development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py b/docs/development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py
index 009ba7fc7..6940f0400 100644
--- a/docs/development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py
+++ b/docs/development/custom-vectors/rsa-oaep-sha2/generate_rsa_oaep_sha2.py
@@ -8,7 +8,6 @@ import os
 
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives.asymmetric import padding, rsa
-
 from tests.utils import load_pkcs1_vectors, load_vectors_from_file
 
 
diff --git a/docs/development/custom-vectors/secp256k1/generate_secp256k1.py b/docs/development/custom-vectors/secp256k1/generate_secp256k1.py
index 2f1f69e94..ab616de7f 100644
--- a/docs/development/custom-vectors/secp256k1/generate_secp256k1.py
+++ b/docs/development/custom-vectors/secp256k1/generate_secp256k1.py
@@ -7,7 +7,6 @@ from ecdsa import SECP256k1, SigningKey
 from ecdsa.util import sigdecode_der, sigencode_der
 
 from cryptography_vectors import open_vector_file
-
 from tests.utils import load_fips_ecdsa_signing_vectors, load_vectors_from_file
 
 HASHLIB_HASH_TYPES = {
diff --git a/docs/development/custom-vectors/secp256k1/verify_secp256k1.py b/docs/development/custom-vectors/secp256k1/verify_secp256k1.py
index 3ba21c8d6..7949a74ee 100644
--- a/docs/development/custom-vectors/secp256k1/verify_secp256k1.py
+++ b/docs/development/custom-vectors/secp256k1/verify_secp256k1.py
@@ -5,7 +5,6 @@ from cryptography.hazmat.primitives.asymmetric import ec
 from cryptography.hazmat.primitives.asymmetric.utils import (
     encode_dss_signature,
 )
-
 from tests.utils import load_fips_ecdsa_signing_vectors, load_vectors_from_file
 
 CRYPTOGRAPHY_HASH_TYPES = {
diff --git a/docs/development/submitting-patches.rst b/docs/development/submitting-patches.rst
index 80a8bb496..4deaafe09 100644
--- a/docs/development/submitting-patches.rst
+++ b/docs/development/submitting-patches.rst
@@ -20,7 +20,7 @@ Code
 
 When in doubt, refer to :pep:`8` for Python code. You can check if your code
 meets our automated requirements by formatting it with ``black`` and running
-``flake8`` against it. If you've installed the development requirements this
+``ruff`` against it. If you've installed the development requirements this
 will automatically use our configuration. You can also run the ``tox`` job with
 ``tox -e flake``.
 
diff --git a/pyproject.toml b/pyproject.toml
index 0fa34fb55..e099c2957 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,3 +63,18 @@ exclude_lines = [
     "@typing.overload",
     "if typing.TYPE_CHECKING",
 ]
+
+[tool.ruff]
+exclude = [
+    '.tox',
+    '*.egg',
+    '.git',
+    '_build',
+    '.hypothesis',
+]
+ignore = ['N818']
+select = ['E', 'F', 'I', 'N', 'W']
+line-length = 79
+
+[tool.ruff.isort]
+known-first-party = ["cryptography", "cryptography_vectors", "tests"]
diff --git a/release.py b/release.py
index e7445d951..5046daff1 100644
--- a/release.py
+++ b/release.py
@@ -10,7 +10,6 @@ import time
 import zipfile
 
 import click
-
 import requests
 
 
diff --git a/setup.cfg b/setup.cfg
index d42e78930..07cce535b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -76,16 +76,8 @@ sdist =
     setuptools_rust >= 0.11.4
 pep8test =
     black
-    flake8
-    flake8-import-order
-    pep8-naming
+    ruff
 # This extra is for OpenSSH private keys that use bcrypt KDF
 # Versions: v3.1.3 - ignore_few_rounds, v3.1.5 - abi3
 ssh =
     bcrypt >= 3.1.5
-
-[flake8]
-ignore = E203,E211,W503,W504,N818
-exclude = .tox,*.egg,.git,_build,.hypothesis
-select = E,W,F,N,I
-application-import-names = cryptography,cryptography_vectors,tests
diff --git a/src/_cffi_src/utils.py b/src/_cffi_src/utils.py
index 5afc084a3..47d31b611 100644
--- a/src/_cffi_src/utils.py
+++ b/src/_cffi_src/utils.py
@@ -10,7 +10,6 @@ from distutils.dist import Distribution
 
 from cffi import FFI
 
-
 # Load the cryptography __about__ to get the current package version
 base_src = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 about = {}
diff --git a/src/cryptography/__init__.py b/src/cryptography/__init__.py
index 6c0fd2a62..07c894ea3 100644
--- a/src/cryptography/__init__.py
+++ b/src/cryptography/__init__.py
@@ -5,14 +5,9 @@
 import sys
 import warnings
 
-from cryptography.__about__ import (
-    __author__,
-    __copyright__,
-    __version__,
-)
+from cryptography.__about__ import __author__, __copyright__, __version__
 from cryptography.utils import CryptographyDeprecationWarning
 
-
 __all__ = [
     "__version__",
     "__author__",
diff --git a/src/cryptography/hazmat/backends/openssl/__init__.py b/src/cryptography/hazmat/backends/openssl/__init__.py
index 31fd17c3b..42c4539df 100644
--- a/src/cryptography/hazmat/backends/openssl/__init__.py
+++ b/src/cryptography/hazmat/backends/openssl/__init__.py
@@ -5,5 +5,4 @@
 
 from cryptography.hazmat.backends.openssl.backend import backend
 
-
 __all__ = ["backend"]
diff --git a/src/cryptography/hazmat/backends/openssl/aead.py b/src/cryptography/hazmat/backends/openssl/aead.py
index aa106fc3a..5b0fd2217 100644
--- a/src/cryptography/hazmat/backends/openssl/aead.py
+++ b/src/cryptography/hazmat/backends/openssl/aead.py
@@ -6,7 +6,6 @@ import typing
 
 from cryptography.exceptions import InvalidTag
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
     from cryptography.hazmat.primitives.ciphers.aead import (
diff --git a/src/cryptography/hazmat/backends/openssl/backend.py b/src/cryptography/hazmat/backends/openssl/backend.py
index caa545824..5294e5d14 100644
--- a/src/cryptography/hazmat/backends/openssl/backend.py
+++ b/src/cryptography/hazmat/backends/openssl/backend.py
@@ -16,10 +16,10 @@ from cryptography.hazmat.backends.openssl import aead
 from cryptography.hazmat.backends.openssl.ciphers import _CipherContext
 from cryptography.hazmat.backends.openssl.cmac import _CMACContext
 from cryptography.hazmat.backends.openssl.dh import (
+    _dh_params_dup,
     _DHParameters,
     _DHPrivateKey,
     _DHPublicKey,
-    _dh_params_dup,
 )
 from cryptography.hazmat.backends.openssl.dsa import (
     _DSAParameters,
@@ -57,9 +57,7 @@ from cryptography.hazmat.backends.openssl.x448 import (
     _X448PrivateKey,
     _X448PublicKey,
 )
-from cryptography.hazmat.bindings._rust import (
-    x509 as rust_x509,
-)
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
 from cryptography.hazmat.bindings.openssl import binding
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives._asymmetric import AsymmetricPadding
@@ -76,8 +74,8 @@ from cryptography.hazmat.primitives.asymmetric import (
 from cryptography.hazmat.primitives.asymmetric.padding import (
     MGF1,
     OAEP,
-    PKCS1v15,
     PSS,
+    PKCS1v15,
 )
 from cryptography.hazmat.primitives.asymmetric.types import (
     CERTIFICATE_ISSUER_PUBLIC_KEY_TYPES,
@@ -93,9 +91,9 @@ from cryptography.hazmat.primitives.ciphers.algorithms import (
     AES128,
     AES256,
     ARC4,
+    SM4,
     Camellia,
     ChaCha20,
-    SM4,
     TripleDES,
     _BlowfishInternal,
     _CAST5Internal,
@@ -109,21 +107,20 @@ from cryptography.hazmat.primitives.ciphers.modes import (
     CTR,
     ECB,
     GCM,
-    Mode,
     OFB,
     XTS,
+    Mode,
 )
 from cryptography.hazmat.primitives.kdf import scrypt
 from cryptography.hazmat.primitives.serialization import ssh
 from cryptography.hazmat.primitives.serialization.pkcs12 import (
+    _ALLOWED_PKCS12_TYPES,
+    _PKCS12_CAS_TYPES,
     PBES,
     PKCS12Certificate,
     PKCS12KeyAndCertificates,
-    _ALLOWED_PKCS12_TYPES,
-    _PKCS12_CAS_TYPES,
 )
 
-
 _MemoryBIO = collections.namedtuple("_MemoryBIO", ["bio", "char_ptr"])
 
 
diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
index 1058de9f1..fd2b6612f 100644
--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
+++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
@@ -8,7 +8,6 @@ from cryptography.exceptions import InvalidTag, UnsupportedAlgorithm, _Reasons
 from cryptography.hazmat.primitives import ciphers
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
 
diff --git a/src/cryptography/hazmat/backends/openssl/cmac.py b/src/cryptography/hazmat/backends/openssl/cmac.py
index 35f50c5c4..6f7363294 100644
--- a/src/cryptography/hazmat/backends/openssl/cmac.py
+++ b/src/cryptography/hazmat/backends/openssl/cmac.py
@@ -13,8 +13,8 @@ from cryptography.hazmat.primitives import constant_time
 from cryptography.hazmat.primitives.ciphers.modes import CBC
 
 if typing.TYPE_CHECKING:
-    from cryptography.hazmat.primitives import ciphers
     from cryptography.hazmat.backends.openssl.backend import Backend
+    from cryptography.hazmat.primitives import ciphers
 
 
 class _CMACContext:
diff --git a/src/cryptography/hazmat/backends/openssl/dh.py b/src/cryptography/hazmat/backends/openssl/dh.py
index 33fed6a40..c429c0239 100644
--- a/src/cryptography/hazmat/backends/openssl/dh.py
+++ b/src/cryptography/hazmat/backends/openssl/dh.py
@@ -8,7 +8,6 @@ from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import dh
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
 
diff --git a/src/cryptography/hazmat/backends/openssl/dsa.py b/src/cryptography/hazmat/backends/openssl/dsa.py
index 8634b7256..15bd84a7b 100644
--- a/src/cryptography/hazmat/backends/openssl/dsa.py
+++ b/src/cryptography/hazmat/backends/openssl/dsa.py
@@ -10,11 +10,8 @@ from cryptography.hazmat.backends.openssl.utils import (
     _calculate_digest_and_algorithm,
 )
 from cryptography.hazmat.primitives import hashes, serialization
-from cryptography.hazmat.primitives.asymmetric import (
-    dsa,
-    utils as asym_utils,
-)
-
+from cryptography.hazmat.primitives.asymmetric import dsa
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
diff --git a/src/cryptography/hazmat/backends/openssl/ed25519.py b/src/cryptography/hazmat/backends/openssl/ed25519.py
index 0ed69245a..6f393e5b6 100644
--- a/src/cryptography/hazmat/backends/openssl/ed25519.py
+++ b/src/cryptography/hazmat/backends/openssl/ed25519.py
@@ -7,10 +7,10 @@ import typing
 from cryptography import exceptions
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric.ed25519 import (
-    Ed25519PrivateKey,
-    Ed25519PublicKey,
     _ED25519_KEY_SIZE,
     _ED25519_SIG_SIZE,
+    Ed25519PrivateKey,
+    Ed25519PublicKey,
 )
 
 if typing.TYPE_CHECKING:
diff --git a/src/cryptography/hazmat/backends/openssl/hashes.py b/src/cryptography/hazmat/backends/openssl/hashes.py
index 278b3815d..52d4646a7 100644
--- a/src/cryptography/hazmat/backends/openssl/hashes.py
+++ b/src/cryptography/hazmat/backends/openssl/hashes.py
@@ -7,7 +7,6 @@ import typing
 from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
 from cryptography.hazmat.primitives import hashes
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
 
diff --git a/src/cryptography/hazmat/backends/openssl/hmac.py b/src/cryptography/hazmat/backends/openssl/hmac.py
index 5fd540747..ba3dfb53f 100644
--- a/src/cryptography/hazmat/backends/openssl/hmac.py
+++ b/src/cryptography/hazmat/backends/openssl/hmac.py
@@ -11,7 +11,6 @@ from cryptography.exceptions import (
 )
 from cryptography.hazmat.primitives import constant_time, hashes
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
 
diff --git a/src/cryptography/hazmat/backends/openssl/poly1305.py b/src/cryptography/hazmat/backends/openssl/poly1305.py
index dd6d376f0..d0d44f6fd 100644
--- a/src/cryptography/hazmat/backends/openssl/poly1305.py
+++ b/src/cryptography/hazmat/backends/openssl/poly1305.py
@@ -7,7 +7,6 @@ import typing
 from cryptography.exceptions import InvalidSignature
 from cryptography.hazmat.primitives import constant_time
 
-
 _POLY1305_TAG_SIZE = 16
 _POLY1305_KEY_SIZE = 32
 
diff --git a/src/cryptography/hazmat/backends/openssl/rsa.py b/src/cryptography/hazmat/backends/openssl/rsa.py
index 694829d2c..e18bab3ff 100644
--- a/src/cryptography/hazmat/backends/openssl/rsa.py
+++ b/src/cryptography/hazmat/backends/openssl/rsa.py
@@ -14,15 +14,13 @@ from cryptography.hazmat.backends.openssl.utils import (
     _calculate_digest_and_algorithm,
 )
 from cryptography.hazmat.primitives import hashes, serialization
-from cryptography.hazmat.primitives.asymmetric import (
-    utils as asym_utils,
-)
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 from cryptography.hazmat.primitives.asymmetric.padding import (
-    AsymmetricPadding,
     MGF1,
     OAEP,
-    PKCS1v15,
     PSS,
+    AsymmetricPadding,
+    PKCS1v15,
     _Auto,
     _DigestLength,
     _MaxLength,
@@ -35,7 +33,6 @@ from cryptography.hazmat.primitives.asymmetric.rsa import (
     RSAPublicNumbers,
 )
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.backend import Backend
 
diff --git a/src/cryptography/hazmat/bindings/_rust/__init__.pyi b/src/cryptography/hazmat/bindings/_rust/__init__.pyi
index 94a37a20a..d7642fcc4 100644
--- a/src/cryptography/hazmat/bindings/_rust/__init__.pyi
+++ b/src/cryptography/hazmat/bindings/_rust/__init__.pyi
@@ -22,7 +22,7 @@ class FixedPool(typing.Generic[T]):
         self,
         create: typing.Callable[[], T],
     ) -> None: ...
-    def acquire(self) -> PoolAcquisition[T]: ...
+    def acquire(self) -> "PoolAcquisition[T]": ...
 
 class PoolAcquisition(typing.Generic[T]):
     def __enter__(self) -> T: ...
diff --git a/src/cryptography/hazmat/bindings/_rust/ocsp.pyi b/src/cryptography/hazmat/bindings/_rust/ocsp.pyi
index acdea3dd2..47a037ade 100644
--- a/src/cryptography/hazmat/bindings/_rust/ocsp.pyi
+++ b/src/cryptography/hazmat/bindings/_rust/ocsp.pyi
@@ -4,15 +4,14 @@
 
 import typing
 
-from cryptography.hazmat.primitives.asymmetric.types import PRIVATE_KEY_TYPES
 from cryptography.hazmat.primitives import hashes
-from cryptography.x509 import Extension
+from cryptography.hazmat.primitives.asymmetric.types import PRIVATE_KEY_TYPES
 from cryptography.x509.ocsp import (
     OCSPRequest,
     OCSPRequestBuilder,
     OCSPResponse,
-    OCSPResponseStatus,
     OCSPResponseBuilder,
+    OCSPResponseStatus,
 )
 
 def load_der_ocsp_request(data: bytes) -> OCSPRequest: ...
diff --git a/src/cryptography/hazmat/bindings/_rust/pkcs7.pyi b/src/cryptography/hazmat/bindings/_rust/pkcs7.pyi
index 6cbc0bcf7..66bd85098 100644
--- a/src/cryptography/hazmat/bindings/_rust/pkcs7.pyi
+++ b/src/cryptography/hazmat/bindings/_rust/pkcs7.pyi
@@ -1,8 +1,8 @@
 import typing
 
+from cryptography import x509
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.serialization import pkcs7
-from cryptography import x509
 
 def serialize_certificates(
     certs: typing.List[x509.Certificate],
diff --git a/src/cryptography/hazmat/bindings/_rust/x509.pyi b/src/cryptography/hazmat/bindings/_rust/x509.pyi
index d92ea6c6a..1bbde8005 100644
--- a/src/cryptography/hazmat/bindings/_rust/x509.pyi
+++ b/src/cryptography/hazmat/bindings/_rust/x509.pyi
@@ -2,7 +2,6 @@
 # 2.0, and the BSD License. See the LICENSE file in the root of this repository
 # for complete details.
 
-import datetime
 import typing
 
 from cryptography import x509
diff --git a/src/cryptography/hazmat/primitives/_asymmetric.py b/src/cryptography/hazmat/primitives/_asymmetric.py
index cdadbdeff..c6862d931 100644
--- a/src/cryptography/hazmat/primitives/_asymmetric.py
+++ b/src/cryptography/hazmat/primitives/_asymmetric.py
@@ -4,7 +4,6 @@
 
 import abc
 
-
 # This exists to break an import cycle. It is normally accessible from the
 # asymmetric padding module.
 
diff --git a/src/cryptography/hazmat/primitives/_cipheralgorithm.py b/src/cryptography/hazmat/primitives/_cipheralgorithm.py
index 7f322048d..6e6a79c11 100644
--- a/src/cryptography/hazmat/primitives/_cipheralgorithm.py
+++ b/src/cryptography/hazmat/primitives/_cipheralgorithm.py
@@ -5,7 +5,6 @@
 import abc
 import typing
 
-
 # This exists to break an import cycle. It is normally accessible from the
 # ciphers module.
 
diff --git a/src/cryptography/hazmat/primitives/asymmetric/dh.py b/src/cryptography/hazmat/primitives/asymmetric/dh.py
index 2093ad4a6..bbdd485cd 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/dh.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/dh.py
@@ -8,7 +8,6 @@ import typing
 
 from cryptography.hazmat.primitives import _serialization
 
-
 _MIN_MODULUS_SIZE = 512
 
 
diff --git a/src/cryptography/hazmat/primitives/asymmetric/dsa.py b/src/cryptography/hazmat/primitives/asymmetric/dsa.py
index 5e587097c..e013d6204 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/dsa.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/dsa.py
@@ -7,9 +7,7 @@ import abc
 import typing
 
 from cryptography.hazmat.primitives import _serialization, hashes
-from cryptography.hazmat.primitives.asymmetric import (
-    utils as asym_utils,
-)
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 
 
 class DSAParameters(metaclass=abc.ABCMeta):
diff --git a/src/cryptography/hazmat/primitives/asymmetric/ec.py b/src/cryptography/hazmat/primitives/asymmetric/ec.py
index 4d949da5e..062b33c34 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/ec.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/ec.py
@@ -9,9 +9,7 @@ import typing
 from cryptography import utils
 from cryptography.hazmat._oid import ObjectIdentifier
 from cryptography.hazmat.primitives import _serialization, hashes
-from cryptography.hazmat.primitives.asymmetric import (
-    utils as asym_utils,
-)
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 
 
 class EllipticCurveOID:
diff --git a/src/cryptography/hazmat/primitives/asymmetric/ed25519.py b/src/cryptography/hazmat/primitives/asymmetric/ed25519.py
index 432770283..220bf592c 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/ed25519.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/ed25519.py
@@ -8,7 +8,6 @@ import abc
 from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
 from cryptography.hazmat.primitives import _serialization
 
-
 _ED25519_KEY_SIZE = 32
 _ED25519_SIG_SIZE = 64
 
diff --git a/src/cryptography/hazmat/primitives/asymmetric/rsa.py b/src/cryptography/hazmat/primitives/asymmetric/rsa.py
index 36d360f22..433f925de 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/rsa.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/rsa.py
@@ -9,9 +9,7 @@ from math import gcd
 
 from cryptography.hazmat.primitives import _serialization, hashes
 from cryptography.hazmat.primitives._asymmetric import AsymmetricPadding
-from cryptography.hazmat.primitives.asymmetric import (
-    utils as asym_utils,
-)
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 
 
 class RSAPrivateKey(metaclass=abc.ABCMeta):
diff --git a/src/cryptography/hazmat/primitives/asymmetric/types.py b/src/cryptography/hazmat/primitives/asymmetric/types.py
index d49781524..369fbf8f2 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/types.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/types.py
@@ -15,7 +15,6 @@ from cryptography.hazmat.primitives.asymmetric import (
     x448,
 )
 
-
 # Every asymmetric key type
 PUBLIC_KEY_TYPES = typing.Union[
     dh.DHPublicKey,
diff --git a/src/cryptography/hazmat/primitives/asymmetric/utils.py b/src/cryptography/hazmat/primitives/asymmetric/utils.py
index 638ecb351..140ca1960 100644
--- a/src/cryptography/hazmat/primitives/asymmetric/utils.py
+++ b/src/cryptography/hazmat/primitives/asymmetric/utils.py
@@ -6,7 +6,6 @@
 from cryptography.hazmat.bindings._rust import asn1
 from cryptography.hazmat.primitives import hashes
 
-
 decode_dss_signature = asn1.decode_dss_signature
 encode_dss_signature = asn1.encode_dss_signature
 
diff --git a/src/cryptography/hazmat/primitives/ciphers/__init__.py b/src/cryptography/hazmat/primitives/ciphers/__init__.py
index 874dbd456..95f02842a 100644
--- a/src/cryptography/hazmat/primitives/ciphers/__init__.py
+++ b/src/cryptography/hazmat/primitives/ciphers/__init__.py
@@ -15,7 +15,6 @@ from cryptography.hazmat.primitives.ciphers.base import (
     CipherContext,
 )
 
-
 __all__ = [
     "Cipher",
     "CipherAlgorithm",
diff --git a/src/cryptography/hazmat/primitives/ciphers/base.py b/src/cryptography/hazmat/primitives/ciphers/base.py
index 7af305249..886afa173 100644
--- a/src/cryptography/hazmat/primitives/ciphers/base.py
+++ b/src/cryptography/hazmat/primitives/ciphers/base.py
@@ -14,7 +14,6 @@ from cryptography.exceptions import (
 from cryptography.hazmat.primitives._cipheralgorithm import CipherAlgorithm
 from cryptography.hazmat.primitives.ciphers import modes
 
-
 if typing.TYPE_CHECKING:
     from cryptography.hazmat.backends.openssl.ciphers import (
         _CipherContext as _BackendCipherContext,
diff --git a/src/cryptography/hazmat/primitives/cmac.py b/src/cryptography/hazmat/primitives/cmac.py
index 1ec756a8e..00c4bd11d 100644
--- a/src/cryptography/hazmat/primitives/cmac.py
+++ b/src/cryptography/hazmat/primitives/cmac.py
@@ -6,9 +6,7 @@
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-)
+from cryptography.exceptions import AlreadyFinalized
 from cryptography.hazmat.primitives import ciphers
 
 if typing.TYPE_CHECKING:
diff --git a/src/cryptography/hazmat/primitives/hashes.py b/src/cryptography/hazmat/primitives/hashes.py
index ba22a6646..440b1a3e9 100644
--- a/src/cryptography/hazmat/primitives/hashes.py
+++ b/src/cryptography/hazmat/primitives/hashes.py
@@ -6,9 +6,7 @@ import abc
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-)
+from cryptography.exceptions import AlreadyFinalized
 
 
 class HashAlgorithm(metaclass=abc.ABCMeta):
diff --git a/src/cryptography/hazmat/primitives/hmac.py b/src/cryptography/hazmat/primitives/hmac.py
index 1577326c9..8f1c0eae6 100644
--- a/src/cryptography/hazmat/primitives/hmac.py
+++ b/src/cryptography/hazmat/primitives/hmac.py
@@ -6,9 +6,7 @@
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-)
+from cryptography.exceptions import AlreadyFinalized
 from cryptography.hazmat.backends.openssl.hmac import _HMACContext
 from cryptography.hazmat.primitives import hashes
 
diff --git a/src/cryptography/hazmat/primitives/kdf/concatkdf.py b/src/cryptography/hazmat/primitives/kdf/concatkdf.py
index 0b0262ebb..94312fec3 100644
--- a/src/cryptography/hazmat/primitives/kdf/concatkdf.py
+++ b/src/cryptography/hazmat/primitives/kdf/concatkdf.py
@@ -6,10 +6,7 @@
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-    InvalidKey,
-)
+from cryptography.exceptions import AlreadyFinalized, InvalidKey
 from cryptography.hazmat.primitives import constant_time, hashes, hmac
 from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
 
diff --git a/src/cryptography/hazmat/primitives/kdf/hkdf.py b/src/cryptography/hazmat/primitives/kdf/hkdf.py
index 44889b67b..2152ae220 100644
--- a/src/cryptography/hazmat/primitives/kdf/hkdf.py
+++ b/src/cryptography/hazmat/primitives/kdf/hkdf.py
@@ -6,10 +6,7 @@
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-    InvalidKey,
-)
+from cryptography.exceptions import AlreadyFinalized, InvalidKey
 from cryptography.hazmat.primitives import constant_time, hashes, hmac
 from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
 
diff --git a/src/cryptography/hazmat/primitives/kdf/scrypt.py b/src/cryptography/hazmat/primitives/kdf/scrypt.py
index ff81bbb1f..286f4388c 100644
--- a/src/cryptography/hazmat/primitives/kdf/scrypt.py
+++ b/src/cryptography/hazmat/primitives/kdf/scrypt.py
@@ -15,7 +15,6 @@ from cryptography.exceptions import (
 from cryptography.hazmat.primitives import constant_time
 from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
 
-
 # This is used by the scrypt tests to skip tests that require more memory
 # than the MEM_LIMIT
 _MEM_LIMIT = sys.maxsize // 2
diff --git a/src/cryptography/hazmat/primitives/kdf/x963kdf.py b/src/cryptography/hazmat/primitives/kdf/x963kdf.py
index aa6bcc1d1..651e691aa 100644
--- a/src/cryptography/hazmat/primitives/kdf/x963kdf.py
+++ b/src/cryptography/hazmat/primitives/kdf/x963kdf.py
@@ -6,10 +6,7 @@
 import typing
 
 from cryptography import utils
-from cryptography.exceptions import (
-    AlreadyFinalized,
-    InvalidKey,
-)
+from cryptography.exceptions import AlreadyFinalized, InvalidKey
 from cryptography.hazmat.primitives import constant_time, hashes
 from cryptography.hazmat.primitives.kdf import KeyDerivationFunction
 
diff --git a/src/cryptography/hazmat/primitives/serialization/__init__.py b/src/cryptography/hazmat/primitives/serialization/__init__.py
index 60241500c..af4112f39 100644
--- a/src/cryptography/hazmat/primitives/serialization/__init__.py
+++ b/src/cryptography/hazmat/primitives/serialization/__init__.py
@@ -26,7 +26,6 @@ from cryptography.hazmat.primitives.serialization.ssh import (
     load_ssh_public_key,
 )
 
-
 __all__ = [
     "load_der_parameters",
     "load_der_private_key",
diff --git a/src/cryptography/hazmat/primitives/serialization/pkcs12.py b/src/cryptography/hazmat/primitives/serialization/pkcs12.py
index 662ea75af..b4d9a3436 100644
--- a/src/cryptography/hazmat/primitives/serialization/pkcs12.py
+++ b/src/cryptography/hazmat/primitives/serialization/pkcs12.py
@@ -14,9 +14,7 @@ from cryptography.hazmat.primitives.asymmetric import (
     ed448,
     rsa,
 )
-from cryptography.hazmat.primitives.asymmetric.types import (
-    PRIVATE_KEY_TYPES,
-)
+from cryptography.hazmat.primitives.asymmetric.types import PRIVATE_KEY_TYPES
 
 __all__ = [
     "PBES",
diff --git a/src/cryptography/hazmat/primitives/serialization/pkcs7.py b/src/cryptography/hazmat/primitives/serialization/pkcs7.py
index 5eaeab388..7e593e719 100644
--- a/src/cryptography/hazmat/primitives/serialization/pkcs7.py
+++ b/src/cryptography/hazmat/primitives/serialization/pkcs7.py
@@ -8,8 +8,7 @@ import email.message
 import io
 import typing
 
-from cryptography import utils
-from cryptography import x509
+from cryptography import utils, x509
 from cryptography.hazmat.bindings._rust import pkcs7 as rust_pkcs7
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives.asymmetric import ec, rsa
diff --git a/src/cryptography/hazmat/primitives/twofactor/hotp.py b/src/cryptography/hazmat/primitives/twofactor/hotp.py
index 9730af2b7..04c45bb8c 100644
--- a/src/cryptography/hazmat/primitives/twofactor/hotp.py
+++ b/src/cryptography/hazmat/primitives/twofactor/hotp.py
@@ -11,7 +11,6 @@ from cryptography.hazmat.primitives import constant_time, hmac
 from cryptography.hazmat.primitives.hashes import SHA1, SHA256, SHA512
 from cryptography.hazmat.primitives.twofactor import InvalidToken
 
-
 _ALLOWED_HASH_TYPES = typing.Union[SHA1, SHA256, SHA512]
 
 
diff --git a/src/cryptography/hazmat/primitives/twofactor/totp.py b/src/cryptography/hazmat/primitives/twofactor/totp.py
index 317baba35..314dbef71 100644
--- a/src/cryptography/hazmat/primitives/twofactor/totp.py
+++ b/src/cryptography/hazmat/primitives/twofactor/totp.py
@@ -7,8 +7,8 @@ import typing
 from cryptography.hazmat.primitives import constant_time
 from cryptography.hazmat.primitives.twofactor import InvalidToken
 from cryptography.hazmat.primitives.twofactor.hotp import (
-    HOTP,
     _ALLOWED_HASH_TYPES,
+    HOTP,
     _generate_uri,
 )
 
diff --git a/src/cryptography/x509/__init__.py b/src/cryptography/x509/__init__.py
index b3f6e608f..ad924ad42 100644
--- a/src/cryptography/x509/__init__.py
+++ b/src/cryptography/x509/__init__.py
@@ -32,19 +32,19 @@ from cryptography.x509.extensions import (
     AuthorityInformationAccess,
     AuthorityKeyIdentifier,
     BasicConstraints,
+    CertificateIssuer,
+    CertificatePolicies,
     CRLDistributionPoints,
     CRLNumber,
     CRLReason,
-    CertificateIssuer,
-    CertificatePolicies,
     DeltaCRLIndicator,
     DistributionPoint,
     DuplicateExtension,
     ExtendedKeyUsage,
     Extension,
     ExtensionNotFound,
-    ExtensionType,
     Extensions,
+    ExtensionType,
     FreshestCRL,
     GeneralNames,
     InhibitAnyPolicy,
@@ -58,8 +58,8 @@ from cryptography.x509.extensions import (
     OCSPNonce,
     PolicyConstraints,
     PolicyInformation,
-    PrecertPoison,
     PrecertificateSignedCertificateTimestamps,
+    PrecertPoison,
     ReasonFlags,
     SignedCertificateTimestamps,
     SubjectAlternativeName,
@@ -71,13 +71,13 @@ from cryptography.x509.extensions import (
     UserNotice,
 )
 from cryptography.x509.general_name import (
-    DNSName,
     DirectoryName,
+    DNSName,
     GeneralName,
     IPAddress,
     OtherName,
-    RFC822Name,
     RegisteredID,
+    RFC822Name,
     UniformResourceIdentifier,
     UnsupportedGeneralNameType,
 )
@@ -88,8 +88,8 @@ from cryptography.x509.name import (
 )
 from cryptography.x509.oid import (
     AuthorityInformationAccessOID,
-    CRLEntryExtensionOID,
     CertificatePoliciesOID,
+    CRLEntryExtensionOID,
     ExtendedKeyUsageOID,
     ExtensionOID,
     NameOID,
@@ -97,7 +97,6 @@ from cryptography.x509.oid import (
     SignatureAlgorithmOID,
 )
 
-
 OID_AUTHORITY_INFORMATION_ACCESS = ExtensionOID.AUTHORITY_INFORMATION_ACCESS
 OID_AUTHORITY_KEY_IDENTIFIER = ExtensionOID.AUTHORITY_KEY_IDENTIFIER
 OID_BASIC_CONSTRAINTS = ExtensionOID.BASIC_CONSTRAINTS
diff --git a/src/cryptography/x509/base.py b/src/cryptography/x509/base.py
index 9c0aad530..49713f4c9 100644
--- a/src/cryptography/x509/base.py
+++ b/src/cryptography/x509/base.py
@@ -27,14 +27,13 @@ from cryptography.hazmat.primitives.asymmetric.types import (
 )
 from cryptography.x509.extensions import (
     Extension,
-    ExtensionType,
     Extensions,
+    ExtensionType,
     _make_sequence_methods,
 )
 from cryptography.x509.name import Name, _ASN1Type
 from cryptography.x509.oid import ObjectIdentifier
 
-
 _EARLIEST_UTC_TIME = datetime.datetime(1950, 1, 1)
 
 
diff --git a/src/cryptography/x509/extensions.py b/src/cryptography/x509/extensions.py
index 36be6f253..2012515f2 100644
--- a/src/cryptography/x509/extensions.py
+++ b/src/cryptography/x509/extensions.py
@@ -23,22 +23,22 @@ from cryptography.x509.certificate_transparency import (
     SignedCertificateTimestamp,
 )
 from cryptography.x509.general_name import (
-    DNSName,
+    _IPADDRESS_TYPES,
     DirectoryName,
+    DNSName,
     GeneralName,
     IPAddress,
     OtherName,
-    RFC822Name,
     RegisteredID,
+    RFC822Name,
     UniformResourceIdentifier,
-    _IPADDRESS_TYPES,
 )
 from cryptography.x509.name import Name, RelativeDistinguishedName
 from cryptography.x509.oid import (
     CRLEntryExtensionOID,
     ExtensionOID,
-    OCSPExtensionOID,
     ObjectIdentifier,
+    OCSPExtensionOID,
 )
 
 ExtensionTypeVar = typing.TypeVar(
diff --git a/src/cryptography/x509/general_name.py b/src/cryptography/x509/general_name.py
index 9939233fe..a2f12b34b 100644
--- a/src/cryptography/x509/general_name.py
+++ b/src/cryptography/x509/general_name.py
@@ -11,7 +11,6 @@ from email.utils import parseaddr
 from cryptography.x509.name import Name
 from cryptography.x509.oid import ObjectIdentifier
 
-
 _IPADDRESS_TYPES = typing.Union[
     ipaddress.IPv4Address,
     ipaddress.IPv6Address,
diff --git a/src/cryptography/x509/name.py b/src/cryptography/x509/name.py
index 702fb4b21..acd7c0f1e 100644
--- a/src/cryptography/x509/name.py
+++ b/src/cryptography/x509/name.py
@@ -9,9 +9,7 @@ import typing
 import warnings
 
 from cryptography import utils
-from cryptography.hazmat.bindings._rust import (
-    x509 as rust_x509,
-)
+from cryptography.hazmat.bindings._rust import x509 as rust_x509
 from cryptography.x509.oid import NameOID, ObjectIdentifier
 
 
diff --git a/src/cryptography/x509/ocsp.py b/src/cryptography/x509/ocsp.py
index 0e59fa4bc..4a08525a7 100644
--- a/src/cryptography/x509/ocsp.py
+++ b/src/cryptography/x509/ocsp.py
@@ -7,8 +7,7 @@ import abc
 import datetime
 import typing
 
-from cryptography import utils
-from cryptography import x509
+from cryptography import utils, x509
 from cryptography.hazmat.bindings._rust import ocsp
 from cryptography.hazmat.primitives import hashes, serialization
 from cryptography.hazmat.primitives.asymmetric.types import (
diff --git a/src/cryptography/x509/oid.py b/src/cryptography/x509/oid.py
index 9bfac75a4..0d91a5469 100644
--- a/src/cryptography/x509/oid.py
+++ b/src/cryptography/x509/oid.py
@@ -5,18 +5,17 @@
 from cryptography.hazmat._oid import (
     AttributeOID,
     AuthorityInformationAccessOID,
-    CRLEntryExtensionOID,
     CertificatePoliciesOID,
+    CRLEntryExtensionOID,
     ExtendedKeyUsageOID,
     ExtensionOID,
     NameOID,
-    OCSPExtensionOID,
     ObjectIdentifier,
+    OCSPExtensionOID,
     SignatureAlgorithmOID,
     SubjectInformationAccessOID,
 )
 
-
 __all__ = [
     "AttributeOID",
     "AuthorityInformationAccessOID",
diff --git a/tests/hazmat/backends/test_openssl.py b/tests/hazmat/backends/test_openssl.py
index a747f4d03..9879ca984 100644
--- a/tests/hazmat/backends/test_openssl.py
+++ b/tests/hazmat/backends/test_openssl.py
@@ -21,7 +21,6 @@ from cryptography.hazmat.primitives.ciphers import Cipher
 from cryptography.hazmat.primitives.ciphers.algorithms import AES
 from cryptography.hazmat.primitives.ciphers.modes import CBC
 
-from ..primitives.fixtures_rsa import RSA_KEY_2048, RSA_KEY_512
 from ...doubles import (
     DummyAsymmetricPadding,
     DummyBlockCipherAlgorithm,
@@ -34,6 +33,7 @@ from ...utils import (
     load_vectors_from_file,
     raises_unsupported_algorithm,
 )
+from ..primitives.fixtures_rsa import RSA_KEY_2048, RSA_KEY_512
 
 
 def skip_if_libre_ssl(openssl_version):
diff --git a/tests/hazmat/backends/test_openssl_memleak.py b/tests/hazmat/backends/test_openssl_memleak.py
index e23054a6e..ad5c4eb70 100644
--- a/tests/hazmat/backends/test_openssl_memleak.py
+++ b/tests/hazmat/backends/test_openssl_memleak.py
@@ -13,7 +13,6 @@ import pytest
 
 from cryptography.hazmat.bindings.openssl.binding import Binding
 
-
 MEMORY_LEAK_SCRIPT = """
 import sys
 
diff --git a/tests/hazmat/primitives/fixtures_dsa.py b/tests/hazmat/primitives/fixtures_dsa.py
index eca0ec431..6675a2c10 100644
--- a/tests/hazmat/primitives/fixtures_dsa.py
+++ b/tests/hazmat/primitives/fixtures_dsa.py
@@ -9,7 +9,6 @@ from cryptography.hazmat.primitives.asymmetric.dsa import (
     DSAPublicNumbers,
 )
 
-
 DSA_KEY_1024 = DSAPrivateNumbers(
     public_numbers=DSAPublicNumbers(
         parameter_numbers=DSAParameterNumbers(
diff --git a/tests/hazmat/primitives/fixtures_ec.py b/tests/hazmat/primitives/fixtures_ec.py
index 317c2ab24..fa671ac55 100644
--- a/tests/hazmat/primitives/fixtures_ec.py
+++ b/tests/hazmat/primitives/fixtures_ec.py
@@ -5,7 +5,6 @@
 
 from cryptography.hazmat.primitives.asymmetric import ec
 
-
 EC_KEY_SECT571R1 = ec.EllipticCurvePrivateNumbers(
     private_value=int(
         "213997069697108634621868251335076179190383272087548888968788698953"
diff --git a/tests/hazmat/primitives/fixtures_rsa.py b/tests/hazmat/primitives/fixtures_rsa.py
index f6b5c3b9f..09b32ab00 100644
--- a/tests/hazmat/primitives/fixtures_rsa.py
+++ b/tests/hazmat/primitives/fixtures_rsa.py
@@ -8,7 +8,6 @@ from cryptography.hazmat.primitives.asymmetric.rsa import (
     RSAPublicNumbers,
 )
 
-
 RSA_KEY_512 = RSAPrivateNumbers(
     p=int(
         "d57846898d5c0de249c08467586cb458fa9bc417cdf297f73cfc52281b787cd9", 16
diff --git a/tests/hazmat/primitives/test_3des.py b/tests/hazmat/primitives/test_3des.py
index ea39a2102..007ecfe21 100644
--- a/tests/hazmat/primitives/test_3des.py
+++ b/tests/hazmat/primitives/test_3des.py
@@ -14,8 +14,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_aead.py b/tests/hazmat/primitives/test_aead.py
index b7a4aedf3..98ebae866 100644
--- a/tests/hazmat/primitives/test_aead.py
+++ b/tests/hazmat/primitives/test_aead.py
@@ -17,13 +17,13 @@ from cryptography.hazmat.primitives.ciphers.aead import (
     ChaCha20Poly1305,
 )
 
-from .utils import _load_all_params
 from ...utils import (
     load_nist_ccm_vectors,
     load_nist_vectors,
     load_vectors_from_file,
     raises_unsupported_algorithm,
 )
+from .utils import _load_all_params
 
 
 class FakeData(bytes):
diff --git a/tests/hazmat/primitives/test_aes.py b/tests/hazmat/primitives/test_aes.py
index 9d68ef202..5798aefc6 100644
--- a/tests/hazmat/primitives/test_aes.py
+++ b/tests/hazmat/primitives/test_aes.py
@@ -10,9 +10,9 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, base, modes
 
-from .utils import _load_all_params, generate_encrypt_test
 from ...doubles import DummyMode
 from ...utils import load_nist_vectors
+from .utils import _load_all_params, generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_aes_gcm.py b/tests/hazmat/primitives/test_aes_gcm.py
index 9220e9e09..c1154a962 100644
--- a/tests/hazmat/primitives/test_aes_gcm.py
+++ b/tests/hazmat/primitives/test_aes_gcm.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, base, modes
 
-from .utils import generate_aead_test
 from ...utils import load_nist_vectors
+from .utils import generate_aead_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_arc4.py b/tests/hazmat/primitives/test_arc4.py
index 5bc23f92e..b589518ad 100644
--- a/tests/hazmat/primitives/test_arc4.py
+++ b/tests/hazmat/primitives/test_arc4.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms
 
-from .utils import generate_stream_encryption_test
 from ...utils import load_nist_vectors
+from .utils import generate_stream_encryption_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_block.py b/tests/hazmat/primitives/test_block.py
index fa2c4f52a..b831de176 100644
--- a/tests/hazmat/primitives/test_block.py
+++ b/tests/hazmat/primitives/test_block.py
@@ -15,12 +15,12 @@ from cryptography.hazmat.primitives.ciphers import (
     modes,
 )
 
+from ...doubles import DummyCipherAlgorithm, DummyMode
+from ...utils import raises_unsupported_algorithm
 from .utils import (
     generate_aead_exception_test,
     generate_aead_tag_exception_test,
 )
-from ...doubles import DummyCipherAlgorithm, DummyMode
-from ...utils import raises_unsupported_algorithm
 
 
 class TestCipher:
diff --git a/tests/hazmat/primitives/test_blowfish.py b/tests/hazmat/primitives/test_blowfish.py
index 4ff8c1f2c..b8f34dfce 100644
--- a/tests/hazmat/primitives/test_blowfish.py
+++ b/tests/hazmat/primitives/test_blowfish.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_camellia.py b/tests/hazmat/primitives/test_camellia.py
index 8ec75510b..d6f1fca86 100644
--- a/tests/hazmat/primitives/test_camellia.py
+++ b/tests/hazmat/primitives/test_camellia.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_cryptrec_vectors, load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_cast5.py b/tests/hazmat/primitives/test_cast5.py
index 6c6f0c884..a6f186a3c 100644
--- a/tests/hazmat/primitives/test_cast5.py
+++ b/tests/hazmat/primitives/test_cast5.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_chacha20.py b/tests/hazmat/primitives/test_chacha20.py
index 4dd1b08cd..5337465b9 100644
--- a/tests/hazmat/primitives/test_chacha20.py
+++ b/tests/hazmat/primitives/test_chacha20.py
@@ -11,8 +11,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms
 
-from .utils import _load_all_params
 from ...utils import load_nist_vectors
+from .utils import _load_all_params
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_cmac.py b/tests/hazmat/primitives/test_cmac.py
index 9596705b1..c9e7fdd88 100644
--- a/tests/hazmat/primitives/test_cmac.py
+++ b/tests/hazmat/primitives/test_cmac.py
@@ -7,10 +7,7 @@ import binascii
 
 import pytest
 
-from cryptography.exceptions import (
-    AlreadyFinalized,
-    InvalidSignature,
-)
+from cryptography.exceptions import AlreadyFinalized, InvalidSignature
 from cryptography.hazmat.primitives.ciphers.algorithms import (
     AES,
     ARC4,
@@ -18,11 +15,7 @@ from cryptography.hazmat.primitives.ciphers.algorithms import (
 )
 from cryptography.hazmat.primitives.cmac import CMAC
 
-from ...utils import (
-    load_nist_vectors,
-    load_vectors_from_file,
-)
-
+from ...utils import load_nist_vectors, load_vectors_from_file
 
 vectors_aes128 = load_vectors_from_file(
     "CMAC/nist-800-38b-aes128.txt", load_nist_vectors
diff --git a/tests/hazmat/primitives/test_concatkdf.py b/tests/hazmat/primitives/test_concatkdf.py
index bd0117ce1..f0dd18828 100644
--- a/tests/hazmat/primitives/test_concatkdf.py
+++ b/tests/hazmat/primitives/test_concatkdf.py
@@ -9,8 +9,10 @@ import pytest
 
 from cryptography.exceptions import AlreadyFinalized, InvalidKey
 from cryptography.hazmat.primitives import hashes
-from cryptography.hazmat.primitives.kdf.concatkdf import ConcatKDFHMAC
-from cryptography.hazmat.primitives.kdf.concatkdf import ConcatKDFHash
+from cryptography.hazmat.primitives.kdf.concatkdf import (
+    ConcatKDFHash,
+    ConcatKDFHMAC,
+)
 
 
 class TestConcatKDFHash:
diff --git a/tests/hazmat/primitives/test_dh.py b/tests/hazmat/primitives/test_dh.py
index 6e708676b..9a28d6114 100644
--- a/tests/hazmat/primitives/test_dh.py
+++ b/tests/hazmat/primitives/test_dh.py
@@ -13,9 +13,9 @@ import pytest
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import dh
 
-from .fixtures_dh import FFDH3072_P
 from ...doubles import DummyKeySerializationEncryption
 from ...utils import load_nist_vectors, load_vectors_from_file
+from .fixtures_dh import FFDH3072_P
 
 # RFC 3526
 P_1536 = int(
diff --git a/tests/hazmat/primitives/test_dsa.py b/tests/hazmat/primitives/test_dsa.py
index 424ffcee5..4ad4e9317 100644
--- a/tests/hazmat/primitives/test_dsa.py
+++ b/tests/hazmat/primitives/test_dsa.py
@@ -17,14 +17,14 @@ from cryptography.hazmat.primitives.asymmetric.utils import (
     encode_dss_signature,
 )
 
-from .fixtures_dsa import DSA_KEY_1024, DSA_KEY_2048, DSA_KEY_3072
-from .utils import skip_fips_traditional_openssl
 from ...doubles import DummyHashAlgorithm, DummyKeySerializationEncryption
 from ...utils import (
     load_fips_dsa_key_pair_vectors,
     load_fips_dsa_sig_vectors,
     load_vectors_from_file,
 )
+from .fixtures_dsa import DSA_KEY_1024, DSA_KEY_2048, DSA_KEY_3072
+from .utils import skip_fips_traditional_openssl
 
 _ALGORITHMS_DICT: typing.Dict[str, hashes.HashAlgorithm] = {
     "SHA1": hashes.SHA1(),
diff --git a/tests/hazmat/primitives/test_ec.py b/tests/hazmat/primitives/test_ec.py
index 3d488be17..142024459 100644
--- a/tests/hazmat/primitives/test_ec.py
+++ b/tests/hazmat/primitives/test_ec.py
@@ -20,8 +20,6 @@ from cryptography.hazmat.primitives.asymmetric.utils import (
     encode_dss_signature,
 )
 
-from .fixtures_ec import EC_KEY_SECP384R1
-from .utils import skip_fips_traditional_openssl
 from ...doubles import DummyKeySerializationEncryption
 from ...utils import (
     load_fips_ecdsa_key_pair_vectors,
@@ -31,6 +29,8 @@ from ...utils import (
     load_vectors_from_file,
     raises_unsupported_algorithm,
 )
+from .fixtures_ec import EC_KEY_SECP384R1
+from .utils import skip_fips_traditional_openssl
 
 _HASH_TYPES: typing.Dict[str, typing.Type[hashes.HashAlgorithm]] = {
     "SHA-1": hashes.SHA1,
diff --git a/tests/hazmat/primitives/test_hash_vectors.py b/tests/hazmat/primitives/test_hash_vectors.py
index d5916f061..bde811186 100644
--- a/tests/hazmat/primitives/test_hash_vectors.py
+++ b/tests/hazmat/primitives/test_hash_vectors.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives import hashes
 
-from .utils import _load_all_params, generate_hash_test
 from ...utils import load_hash_vectors, load_nist_vectors
+from .utils import _load_all_params, generate_hash_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_hashes.py b/tests/hazmat/primitives/test_hashes.py
index 37744e745..1d096772a 100644
--- a/tests/hazmat/primitives/test_hashes.py
+++ b/tests/hazmat/primitives/test_hashes.py
@@ -10,9 +10,9 @@ import pytest
 from cryptography.exceptions import AlreadyFinalized, _Reasons
 from cryptography.hazmat.primitives import hashes
 
-from .utils import generate_base_hash_test
 from ...doubles import DummyHashAlgorithm
 from ...utils import raises_unsupported_algorithm
+from .utils import generate_base_hash_test
 
 
 class TestHashContext:
diff --git a/tests/hazmat/primitives/test_hkdf.py b/tests/hazmat/primitives/test_hkdf.py
index cc001baf5..0bd5c97c4 100644
--- a/tests/hazmat/primitives/test_hkdf.py
+++ b/tests/hazmat/primitives/test_hkdf.py
@@ -12,10 +12,7 @@ from cryptography.exceptions import AlreadyFinalized, InvalidKey
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives.kdf.hkdf import HKDF, HKDFExpand
 
-from ...utils import (
-    load_nist_vectors,
-    load_vectors_from_file,
-)
+from ...utils import load_nist_vectors, load_vectors_from_file
 
 
 class TestHKDF:
diff --git a/tests/hazmat/primitives/test_hkdf_vectors.py b/tests/hazmat/primitives/test_hkdf_vectors.py
index 711d1b5ec..080aa1b5b 100644
--- a/tests/hazmat/primitives/test_hkdf_vectors.py
+++ b/tests/hazmat/primitives/test_hkdf_vectors.py
@@ -9,8 +9,8 @@ import pytest
 
 from cryptography.hazmat.primitives import hashes
 
-from .utils import generate_hkdf_test
 from ...utils import load_nist_vectors
+from .utils import generate_hkdf_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_hmac.py b/tests/hazmat/primitives/test_hmac.py
index 414385c5d..818ff2a7d 100644
--- a/tests/hazmat/primitives/test_hmac.py
+++ b/tests/hazmat/primitives/test_hmac.py
@@ -14,9 +14,9 @@ from cryptography.exceptions import (
 )
 from cryptography.hazmat.primitives import hashes, hmac
 
-from .utils import generate_base_hmac_test
 from ...doubles import DummyHashAlgorithm
 from ...utils import raises_unsupported_algorithm
+from .utils import generate_base_hmac_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_hmac_vectors.py b/tests/hazmat/primitives/test_hmac_vectors.py
index 703065a55..790993a34 100644
--- a/tests/hazmat/primitives/test_hmac_vectors.py
+++ b/tests/hazmat/primitives/test_hmac_vectors.py
@@ -9,8 +9,8 @@ import pytest
 
 from cryptography.hazmat.primitives import hashes, hmac
 
-from .utils import generate_hmac_test
 from ...utils import load_hash_vectors
+from .utils import generate_hmac_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_idea.py b/tests/hazmat/primitives/test_idea.py
index d591fe4e7..9817d5444 100644
--- a/tests/hazmat/primitives/test_idea.py
+++ b/tests/hazmat/primitives/test_idea.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_kbkdf.py b/tests/hazmat/primitives/test_kbkdf.py
index bb8ebea0d..4329e3df6 100644
--- a/tests/hazmat/primitives/test_kbkdf.py
+++ b/tests/hazmat/primitives/test_kbkdf.py
@@ -11,9 +11,9 @@ from cryptography.exceptions import AlreadyFinalized, InvalidKey, _Reasons
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives.ciphers import algorithms
 from cryptography.hazmat.primitives.kdf.kbkdf import (
-    CounterLocation,
     KBKDFCMAC,
     KBKDFHMAC,
+    CounterLocation,
     Mode,
 )
 
diff --git a/tests/hazmat/primitives/test_kbkdf_vectors.py b/tests/hazmat/primitives/test_kbkdf_vectors.py
index fef75fe21..cab817bf4 100644
--- a/tests/hazmat/primitives/test_kbkdf_vectors.py
+++ b/tests/hazmat/primitives/test_kbkdf_vectors.py
@@ -5,8 +5,8 @@
 
 import os
 
-from .utils import generate_kbkdf_counter_mode_test
 from ...utils import load_nist_kbkdf_vectors
+from .utils import generate_kbkdf_counter_mode_test
 
 
 class TestCounterKDFCounterMode:
diff --git a/tests/hazmat/primitives/test_keywrap.py b/tests/hazmat/primitives/test_keywrap.py
index b2fa05d74..7dfb80901 100644
--- a/tests/hazmat/primitives/test_keywrap.py
+++ b/tests/hazmat/primitives/test_keywrap.py
@@ -11,8 +11,8 @@ import pytest
 from cryptography.hazmat.primitives import keywrap
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import _load_all_params
 from ...utils import load_nist_vectors
+from .utils import _load_all_params
 
 
 class TestAESKeyWrap:
diff --git a/tests/hazmat/primitives/test_pbkdf2hmac_vectors.py b/tests/hazmat/primitives/test_pbkdf2hmac_vectors.py
index f092894f5..60d2f864d 100644
--- a/tests/hazmat/primitives/test_pbkdf2hmac_vectors.py
+++ b/tests/hazmat/primitives/test_pbkdf2hmac_vectors.py
@@ -7,8 +7,8 @@ import pytest
 
 from cryptography.hazmat.primitives import hashes
 
-from .utils import generate_pbkdf2_test
 from ...utils import load_nist_vectors
+from .utils import generate_pbkdf2_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_rsa.py b/tests/hazmat/primitives/test_rsa.py
index 7a4b2f1e3..919331caf 100644
--- a/tests/hazmat/primitives/test_rsa.py
+++ b/tests/hazmat/primitives/test_rsa.py
@@ -15,16 +15,25 @@ from cryptography.exceptions import (
     _Reasons,
 )
 from cryptography.hazmat.primitives import hashes, serialization
-from cryptography.hazmat.primitives.asymmetric import (
-    padding,
-    rsa,
-    utils as asym_utils,
-)
+from cryptography.hazmat.primitives.asymmetric import padding, rsa
+from cryptography.hazmat.primitives.asymmetric import utils as asym_utils
 from cryptography.hazmat.primitives.asymmetric.rsa import (
     RSAPrivateNumbers,
     RSAPublicNumbers,
 )
 
+from ...doubles import (
+    DummyAsymmetricPadding,
+    DummyHashAlgorithm,
+    DummyKeySerializationEncryption,
+)
+from ...utils import (
+    load_nist_vectors,
+    load_pkcs1_vectors,
+    load_rsa_nist_vectors,
+    load_vectors_from_file,
+    raises_unsupported_algorithm,
+)
 from .fixtures_rsa import (
     RSA_KEY_1024,
     RSA_KEY_1025,
@@ -48,18 +57,6 @@ from .utils import (
     generate_rsa_verification_test,
     skip_fips_traditional_openssl,
 )
-from ...doubles import (
-    DummyAsymmetricPadding,
-    DummyHashAlgorithm,
-    DummyKeySerializationEncryption,
-)
-from ...utils import (
-    load_nist_vectors,
-    load_pkcs1_vectors,
-    load_rsa_nist_vectors,
-    load_vectors_from_file,
-    raises_unsupported_algorithm,
-)
 
 
 class DummyMGF(padding.MGF):
diff --git a/tests/hazmat/primitives/test_scrypt.py b/tests/hazmat/primitives/test_scrypt.py
index 6e95a1f26..4b4641854 100644
--- a/tests/hazmat/primitives/test_scrypt.py
+++ b/tests/hazmat/primitives/test_scrypt.py
@@ -8,12 +8,8 @@ import os
 
 import pytest
 
-from cryptography.exceptions import (
-    AlreadyFinalized,
-    InvalidKey,
-)
-from cryptography.hazmat.primitives.kdf.scrypt import Scrypt, _MEM_LIMIT
-
+from cryptography.exceptions import AlreadyFinalized, InvalidKey
+from cryptography.hazmat.primitives.kdf.scrypt import _MEM_LIMIT, Scrypt
 from tests.utils import (
     load_nist_vectors,
     load_vectors_from_file,
diff --git a/tests/hazmat/primitives/test_seed.py b/tests/hazmat/primitives/test_seed.py
index eb0b88c2a..9f68bc3fb 100644
--- a/tests/hazmat/primitives/test_seed.py
+++ b/tests/hazmat/primitives/test_seed.py
@@ -10,8 +10,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/test_serialization.py b/tests/hazmat/primitives/test_serialization.py
index 3a08d5570..3f1a55c23 100644
--- a/tests/hazmat/primitives/test_serialization.py
+++ b/tests/hazmat/primitives/test_serialization.py
@@ -39,15 +39,11 @@ from cryptography.hazmat.primitives.serialization import (
 )
 from cryptography.hazmat.primitives.serialization.pkcs12 import PBES
 
-
-from .fixtures_rsa import RSA_KEY_2048
-from .test_ec import _skip_curve_unsupported
-from .utils import (
-    _check_dsa_private_numbers,
-    _check_rsa_private_numbers,
-)
 from ...doubles import DummyKeySerializationEncryption
 from ...utils import load_vectors_from_file, raises_unsupported_algorithm
+from .fixtures_rsa import RSA_KEY_2048
+from .test_ec import _skip_curve_unsupported
+from .utils import _check_dsa_private_numbers, _check_rsa_private_numbers
 
 
 def _skip_fips_format(key_path, password, backend):
diff --git a/tests/hazmat/primitives/test_sm4.py b/tests/hazmat/primitives/test_sm4.py
index 07b0cc7f7..13d9b5051 100644
--- a/tests/hazmat/primitives/test_sm4.py
+++ b/tests/hazmat/primitives/test_sm4.py
@@ -9,8 +9,8 @@ import pytest
 
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-from .utils import generate_encrypt_test
 from ...utils import load_nist_vectors
+from .utils import generate_encrypt_test
 
 
 @pytest.mark.supported(
diff --git a/tests/hazmat/primitives/twofactor/test_hotp.py b/tests/hazmat/primitives/twofactor/test_hotp.py
index d1c6cb530..31e01a495 100644
--- a/tests/hazmat/primitives/twofactor/test_hotp.py
+++ b/tests/hazmat/primitives/twofactor/test_hotp.py
@@ -12,10 +12,7 @@ from cryptography.hazmat.primitives.hashes import MD5, SHA1
 from cryptography.hazmat.primitives.twofactor import InvalidToken
 from cryptography.hazmat.primitives.twofactor.hotp import HOTP
 
-from ....utils import (
-    load_nist_vectors,
-    load_vectors_from_file,
-)
+from ....utils import load_nist_vectors, load_vectors_from_file
 
 vectors = load_vectors_from_file("twofactor/rfc-4226.txt", load_nist_vectors)
 
diff --git a/tests/hazmat/primitives/twofactor/test_totp.py b/tests/hazmat/primitives/twofactor/test_totp.py
index 3c8d6b372..f68a8339c 100644
--- a/tests/hazmat/primitives/twofactor/test_totp.py
+++ b/tests/hazmat/primitives/twofactor/test_totp.py
@@ -9,10 +9,7 @@ from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.primitives.twofactor import InvalidToken
 from cryptography.hazmat.primitives.twofactor.totp import TOTP
 
-from ....utils import (
-    load_nist_vectors,
-    load_vectors_from_file,
-)
+from ....utils import load_nist_vectors, load_vectors_from_file
 
 vectors = load_vectors_from_file("twofactor/rfc-6238.txt", load_nist_vectors)
 
diff --git a/tests/hazmat/primitives/utils.py b/tests/hazmat/primitives/utils.py
index c8021cc2f..aac7296e6 100644
--- a/tests/hazmat/primitives/utils.py
+++ b/tests/hazmat/primitives/utils.py
@@ -26,9 +26,9 @@ from cryptography.hazmat.primitives.ciphers import (
 from cryptography.hazmat.primitives.ciphers.modes import GCM
 from cryptography.hazmat.primitives.kdf.hkdf import HKDF, HKDFExpand
 from cryptography.hazmat.primitives.kdf.kbkdf import (
-    CounterLocation,
     KBKDFCMAC,
     KBKDFHMAC,
+    CounterLocation,
     Mode,
 )
 from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
diff --git a/tests/test_fernet.py b/tests/test_fernet.py
index 58dd77296..d4b1561a0 100644
--- a/tests/test_fernet.py
+++ b/tests/test_fernet.py
@@ -10,16 +10,13 @@ import os
 import time
 
 import iso8601
-
 import pretend
-
 import pytest
 
+import cryptography_vectors
 from cryptography.fernet import Fernet, InvalidToken, MultiFernet
 from cryptography.hazmat.primitives.ciphers import algorithms, modes
 
-import cryptography_vectors
-
 
 def json_parametrize(keys, filename):
     vector_file = cryptography_vectors.open_vector_file(
diff --git a/tests/test_utils.py b/tests/test_utils.py
index 8b07c91b0..9f6e27150 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -9,14 +9,12 @@ import os
 import textwrap
 
 import pretend
-
 import pytest
 
 import cryptography
 import cryptography.utils
-from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
-
 import cryptography_vectors
+from cryptography.exceptions import UnsupportedAlgorithm, _Reasons
 
 from . import deprecated_module
 from .utils import (
diff --git a/tests/utils.py b/tests/utils.py
index 6119d3f4d..405cfbc78 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -13,10 +13,8 @@ from contextlib import contextmanager
 
 import pytest
 
-from cryptography.exceptions import UnsupportedAlgorithm
-
 import cryptography_vectors
-
+from cryptography.exceptions import UnsupportedAlgorithm
 
 HashVector = collections.namedtuple("HashVector", ["message", "digest"])
 KeyedHashVector = collections.namedtuple(
diff --git a/tests/wycheproof/test_aes.py b/tests/wycheproof/test_aes.py
index 891d8df43..ce83fe3c0 100644
--- a/tests/wycheproof/test_aes.py
+++ b/tests/wycheproof/test_aes.py
@@ -12,8 +12,8 @@ from cryptography.hazmat.primitives import padding
 from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
 from cryptography.hazmat.primitives.ciphers.aead import AESCCM, AESGCM
 
-from .utils import wycheproof_tests
 from ..hazmat.primitives.test_aead import _aead_supported
+from .utils import wycheproof_tests
 
 
 @wycheproof_tests("aes_cbc_pkcs5_test.json")
diff --git a/tests/wycheproof/test_chacha20poly1305.py b/tests/wycheproof/test_chacha20poly1305.py
index 7cb8ff50f..06d6fc76a 100644
--- a/tests/wycheproof/test_chacha20poly1305.py
+++ b/tests/wycheproof/test_chacha20poly1305.py
@@ -10,8 +10,8 @@ import pytest
 from cryptography.exceptions import InvalidTag
 from cryptography.hazmat.primitives.ciphers.aead import ChaCha20Poly1305
 
-from .utils import wycheproof_tests
 from ..hazmat.primitives.test_aead import _aead_supported
+from .utils import wycheproof_tests
 
 
 @pytest.mark.skipif(
diff --git a/tests/wycheproof/test_dsa.py b/tests/wycheproof/test_dsa.py
index 3d31ee170..b7da82dc3 100644
--- a/tests/wycheproof/test_dsa.py
+++ b/tests/wycheproof/test_dsa.py
@@ -13,7 +13,6 @@ from cryptography.hazmat.primitives.asymmetric import dsa
 
 from .utils import wycheproof_tests
 
-
 _DIGESTS = {
     "SHA-1": hashes.SHA1(),
     "SHA-224": hashes.SHA224(),
diff --git a/tests/wycheproof/test_ecdh.py b/tests/wycheproof/test_ecdh.py
index 672863fe7..1de26cb26 100644
--- a/tests/wycheproof/test_ecdh.py
+++ b/tests/wycheproof/test_ecdh.py
@@ -11,9 +11,8 @@ from cryptography.exceptions import UnsupportedAlgorithm
 from cryptography.hazmat.primitives import serialization
 from cryptography.hazmat.primitives.asymmetric import ec
 
-from .utils import wycheproof_tests
 from ..hazmat.primitives.test_ec import _skip_exchange_algorithm_unsupported
-
+from .utils import wycheproof_tests
 
 _CURVES = {
     "secp224r1": ec.SECP224R1(),
diff --git a/tests/wycheproof/test_ecdsa.py b/tests/wycheproof/test_ecdsa.py
index b2ec9dfec..ffdfcc461 100644
--- a/tests/wycheproof/test_ecdsa.py
+++ b/tests/wycheproof/test_ecdsa.py
@@ -13,7 +13,6 @@ from cryptography.hazmat.primitives.asymmetric import ec
 
 from .utils import wycheproof_tests
 
-
 _DIGESTS = {
     "SHA-1": hashes.SHA1(),
     "SHA-224": hashes.SHA224(),
diff --git a/tests/wycheproof/test_hkdf.py b/tests/wycheproof/test_hkdf.py
index 4886be0fe..3d54e44ff 100644
--- a/tests/wycheproof/test_hkdf.py
+++ b/tests/wycheproof/test_hkdf.py
@@ -12,7 +12,6 @@ from cryptography.hazmat.primitives.kdf.hkdf import HKDF
 
 from .utils import wycheproof_tests
 
-
 _HASH_ALGORITHMS = {
     "HKDF-SHA-1": hashes.SHA1(),
     "HKDF-SHA-256": hashes.SHA256(),
diff --git a/tests/wycheproof/test_hmac.py b/tests/wycheproof/test_hmac.py
index 84b0c19a0..49fe772cb 100644
--- a/tests/wycheproof/test_hmac.py
+++ b/tests/wycheproof/test_hmac.py
@@ -12,7 +12,6 @@ from cryptography.hazmat.primitives import hashes, hmac
 
 from .utils import wycheproof_tests
 
-
 _HMAC_ALGORITHMS = {
     "HMACSHA1": hashes.SHA1(),
     "HMACSHA224": hashes.SHA224(),
diff --git a/tests/wycheproof/test_rsa.py b/tests/wycheproof/test_rsa.py
index e2b8426fd..56ec21bc0 100644
--- a/tests/wycheproof/test_rsa.py
+++ b/tests/wycheproof/test_rsa.py
@@ -13,7 +13,6 @@ from cryptography.hazmat.primitives.asymmetric import padding, rsa
 
 from .utils import wycheproof_tests
 
-
 _DIGESTS = {
     "SHA-1": hashes.SHA1(),
     "SHA-224": hashes.SHA224(),
diff --git a/tests/x509/test_ocsp.py b/tests/x509/test_ocsp.py
index 9090e5205..ade916195 100644
--- a/tests/x509/test_ocsp.py
+++ b/tests/x509/test_ocsp.py
@@ -15,9 +15,9 @@ from cryptography.hazmat.primitives.asymmetric import ec, ed25519, ed448, rsa
 from cryptography.hazmat.primitives.asymmetric.padding import PKCS1v15
 from cryptography.x509 import ocsp
 
-from .test_x509 import DummyExtension, _load_cert
 from ..hazmat.primitives.fixtures_ec import EC_KEY_SECP256R1
 from ..utils import load_vectors_from_file, raises_unsupported_algorithm
+from .test_x509 import DummyExtension, _load_cert
 
 
 def _load_data(filename, loader):
diff --git a/tests/x509/test_x509.py b/tests/x509/test_x509.py
index 8a92c297c..1de0f6c45 100644
--- a/tests/x509/test_x509.py
+++ b/tests/x509/test_x509.py
@@ -12,7 +12,6 @@ import os
 import typing
 
 import pytest
-
 import pytz
 
 from cryptography import utils, x509
diff --git a/tests/x509/test_x509_crlbuilder.py b/tests/x509/test_x509_crlbuilder.py
index e3e34285d..5960cdd3b 100644
--- a/tests/x509/test_x509_crlbuilder.py
+++ b/tests/x509/test_x509_crlbuilder.py
@@ -6,7 +6,6 @@
 import datetime
 
 import pytest
-
 import pytz
 
 from cryptography import x509
@@ -18,11 +17,11 @@ from cryptography.x509.oid import (
     SignatureAlgorithmOID,
 )
 
-from .test_x509 import DummyExtension
 from ..hazmat.primitives.fixtures_dsa import DSA_KEY_2048
 from ..hazmat.primitives.fixtures_ec import EC_KEY_SECP256R1
 from ..hazmat.primitives.fixtures_rsa import RSA_KEY_2048, RSA_KEY_512
 from ..hazmat.primitives.test_ec import _skip_curve_unsupported
+from .test_x509 import DummyExtension
 
 
 class TestCertificateRevocationListBuilder:
diff --git a/tests/x509/test_x509_ext.py b/tests/x509/test_x509_ext.py
index 7284a73be..d3276b7cd 100644
--- a/tests/x509/test_x509_ext.py
+++ b/tests/x509/test_x509_ext.py
@@ -10,7 +10,6 @@ import os
 import typing
 
 import pretend
-
 import pytest
 
 from cryptography import x509
@@ -37,10 +36,10 @@ from cryptography.x509.oid import (
     SubjectInformationAccessOID,
 )
 
-from .test_x509 import _load_cert
 from ..hazmat.primitives.fixtures_rsa import RSA_KEY_2048
 from ..hazmat.primitives.test_ec import _skip_curve_unsupported
 from ..utils import load_vectors_from_file
+from .test_x509 import _load_cert
 
 
 def _make_certbuilder(private_key):
diff --git a/tests/x509/test_x509_revokedcertbuilder.py b/tests/x509/test_x509_revokedcertbuilder.py
index b2facfa51..83a71ff9b 100644
--- a/tests/x509/test_x509_revokedcertbuilder.py
+++ b/tests/x509/test_x509_revokedcertbuilder.py
@@ -6,7 +6,6 @@
 import datetime
 
 import pytest
-
 import pytz
 
 from cryptography import x509
diff --git a/tox.ini b/tox.ini
index 546c6cdd6..5159c5a1a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -64,7 +64,7 @@ deps =
     types-pytz
     check-manifest
 commands =
-    flake8 .
+    ruff .
     black --check .
     check-manifest
     mypy src/cryptography/ vectors/cryptography_vectors/ tests/
diff --git a/vectors/cryptography_vectors/__init__.py b/vectors/cryptography_vectors/__init__.py
index 1fe176754..443357b28 100644
--- a/vectors/cryptography_vectors/__init__.py
+++ b/vectors/cryptography_vectors/__init__.py
@@ -7,7 +7,6 @@ import typing
 
 from cryptography_vectors.__about__ import __version__
 
-
 __all__ = [
     "__version__",
 ]
diff --git a/vectors/setup.py b/vectors/setup.py
index 68ff1cd8a..88d88a75d 100644
--- a/vectors/setup.py
+++ b/vectors/setup.py
@@ -6,5 +6,4 @@
 
 from setuptools import setup
 
-
 setup()