diff --git a/.gitignore b/.gitignore
index e3a67ef..150293c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,5 +10,6 @@ build
 dist
 *.pyc
 .pytest_cache/
+.ruff_cache/
 # dump.rdb is created by redis-server, needed to run tests
 dump.rdb
diff --git a/.isort.cfg b/.isort.cfg
deleted file mode 100644
index ba2778d..0000000
--- a/.isort.cfg
+++ /dev/null
@@ -1,6 +0,0 @@
-[settings]
-multi_line_output=3
-include_trailing_comma=True
-force_grid_wrap=0
-use_parentheses=True
-line_length=88
diff --git a/MANIFEST.in b/MANIFEST.in
index af16441..42b4eb4 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,6 +1,6 @@
 recursive-include docs *
 recursive-include tests *
-include pytest.ini AUTHORS.rst CODE_OF_CONDUCT.md pyproject.toml LICENSE README.rst tox.ini .coveragerc .isort.cfg .readthedocs.yaml
+include pytest.ini AUTHORS.rst CODE_OF_CONDUCT.md pyproject.toml LICENSE README.rst tox.ini .coveragerc .readthedocs.yaml
 prune docs/_build
 global-exclude *.pyc
 prune __pycache__
diff --git a/pyproject.toml b/pyproject.toml
index 63c8fb3..f60887f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,17 +1,27 @@
-[tool.black]
-line-length = 88 
-target-version = ['py37', 'py38', 'py39', 'py310', 'py311']
-include = '\.pyi?$'
-exclude = '''
-/(
-    \.eggs
-  | \.git
-  | \.hg
-  | \.mypy_cache
-  | \.tox
-  | \.venv
-  | _build
-  | build
-  | dist
-)/
-'''
+[tool.ruff]
+extend-exclude = [
+    "__pycache__",
+]
+
+[tool.ruff.lint]
+select = [
+    # pycodestyle
+    "E", "W",
+    # flake8
+    "F",
+    # isort
+    "I",
+    # pytest style
+    "PT",
+    # eradicate commented code
+    "ERA",
+    # ruff lint
+    "RUF",
+]
+ignore = [
+    # `format` will wrap lines.
+    "E501",
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["dockerflow"]
diff --git a/src/dockerflow/django/middleware.py b/src/dockerflow/django/middleware.py
index 8b20936..7208ce4 100644
--- a/src/dockerflow/django/middleware.py
+++ b/src/dockerflow/django/middleware.py
@@ -1,6 +1,7 @@
 import logging
 import re
 import time
+import typing
 import urllib
 import uuid
 
@@ -16,7 +17,7 @@ class DockerflowMiddleware(MiddlewareMixin):
     https://github.com/mozilla-services/Dockerflow/blob/main/docs/mozlog.md
     """
 
-    viewpatterns = [
+    viewpatterns: typing.ClassVar = [
         (re.compile(r"/__version__/?$"), views.version),
         (re.compile(r"/__heartbeat__/?$"), views.heartbeat),
         (re.compile(r"/__lbheartbeat__/?$"), views.lbheartbeat),
diff --git a/src/dockerflow/logging.py b/src/dockerflow/logging.py
index 081d808..567b64b 100644
--- a/src/dockerflow/logging.py
+++ b/src/dockerflow/logging.py
@@ -8,6 +8,7 @@
 import socket
 import sys
 import traceback
+import typing
 
 
 class SafeJSONEncoder(json.JSONEncoder):
@@ -32,7 +33,7 @@ class JsonLogFormatter(logging.Formatter):
     LOGGING_FORMAT_VERSION = "2.0"
 
     # Map from Python logging to Syslog severity levels
-    SYSLOG_LEVEL_MAP = {
+    SYSLOG_LEVEL_MAP: typing.ClassVar = {
         50: 2,  # CRITICAL
         40: 3,  # ERROR
         30: 4,  # WARNING
@@ -43,7 +44,7 @@ class JsonLogFormatter(logging.Formatter):
     # Syslog level to use when/if python level isn't found in map
     DEFAULT_SYSLOG_LEVEL = 7
 
-    EXCLUDED_LOGRECORD_ATTRS = set(
+    EXCLUDED_LOGRECORD_ATTRS: typing.ClassVar = set(
         (
             "args",
             "asctime",
diff --git a/tests/conftest.py b/tests/conftest.py
index ec3ae02..6cd8e79 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -6,7 +6,7 @@
 import dockerflow.checks.registry
 
 
-@pytest.fixture
+@pytest.fixture()
 def version_content():
     """
     as documented on https://github.com/mozilla-services/Dockerflow/blob/main/docs/version_object.md
@@ -20,6 +20,6 @@ def version_content():
 
 
 @pytest.fixture(autouse=True)
-def clear_checks():
+def _clear_checks():
     yield
     dockerflow.checks.registry.clear_checks()
diff --git a/tests/core/test_logging.py b/tests/core/test_logging.py
index 1ac702f..54d2b71 100644
--- a/tests/core/test_logging.py
+++ b/tests/core/test_logging.py
@@ -15,7 +15,7 @@
 
 
 @pytest.fixture()
-def reset_logging():
+def _reset_logging():
     logging.shutdown()
     reload(logging)
 
@@ -31,7 +31,8 @@ def assert_records(records):
     return details
 
 
-def test_initialization_from_ini(reset_logging, caplog, tmpdir):
+@pytest.mark.usefixtures("_reset_logging")
+def test_initialization_from_ini(caplog, tmpdir):
     ini_content = textwrap.dedent(
         """
     [loggers]
@@ -229,7 +230,5 @@ def test_ignore_json_message(caplog):
         }
     }
 }
-""".replace(
-        "\\", "\\\\"
-    )
+""".replace("\\", "\\\\")
 )  # HACK: Fix escaping for easy copy/paste
diff --git a/tests/django/test_django.py b/tests/django/test_django.py
index 5464e97..593798b 100644
--- a/tests/django/test_django.py
+++ b/tests/django/test_django.py
@@ -20,19 +20,19 @@
 
 
 @pytest.fixture(autouse=True)
-def reset_checks():
+def _reset_checks():
     yield
     registry.registered_checks = set()
     registry.deployment_checks = set()
 
 
 @pytest.fixture(autouse=True)
-def setup_request_summary_logger(dockerflow_middleware):
+def _setup_request_summary_logger(dockerflow_middleware):
     dockerflow_middleware.summary_logger.addHandler(logging.NullHandler())
     dockerflow_middleware.summary_logger.setLevel(logging.INFO)
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow_middleware():
     return DockerflowMiddleware(get_response=HttpResponse())
 
@@ -55,7 +55,7 @@ def test_version_missing(dockerflow_middleware, mocker, rf):
     assert response.status_code == 404
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat(client, settings):
     response = client.get("/__heartbeat__")
     assert response.status_code == 200
@@ -73,7 +73,7 @@ def test_heartbeat(client, settings):
     assert content.get("details") is None
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat_debug(client, settings):
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -89,7 +89,7 @@ def test_heartbeat_debug(client, settings):
     assert content["details"]
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_heartbeat_silenced(client, settings):
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -107,8 +107,9 @@ def test_heartbeat_silenced(client, settings):
     assert "error" not in content["details"]
 
 
-@pytest.mark.django_db
-def test_heartbeat_logging(dockerflow_middleware, reset_checks, rf, settings, caplog):
+@pytest.mark.django_db()
+@pytest.mark.usefixtures("_reset_checks")
+def test_heartbeat_logging(dockerflow_middleware, rf, settings, caplog):
     request = rf.get("/__heartbeat__")
     settings.DOCKERFLOW_CHECKS = [
         "tests.django.django_checks.warning",
@@ -123,7 +124,7 @@ def test_heartbeat_logging(dockerflow_middleware, reset_checks, rf, settings, ca
     assert ("WARNING", "tests.checks.W001: some warning") in logged
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_lbheartbeat_makes_no_db_queries(dockerflow_middleware, rf):
     queries = CaptureQueriesContext(connection)
     request = rf.get("/__lbheartbeat__")
@@ -133,7 +134,7 @@ def test_lbheartbeat_makes_no_db_queries(dockerflow_middleware, rf):
     assert len(queries) == 0
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_redis_check(client, settings):
     settings.DOCKERFLOW_CHECKS = ["dockerflow.django.checks.check_redis_connected"]
     checks.register()
@@ -152,7 +153,7 @@ def assert_log_record(request, record, errno=0, level=logging.INFO):
     assert isinstance(record.t, int)
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow_request(rf):
     return rf.get("/", HTTP_USER_AGENT="dockerflow/tests", HTTP_ACCEPT_LANGUAGE="tlh")
 
@@ -248,7 +249,7 @@ def test_check_database_connected_misconfigured(mocker):
     assert errors[0].id == health.ERROR_MISCONFIGURED_DATABASE
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_database_connected_unsuable(mocker):
     mocker.patch("django.db.connection.is_usable", return_value=False)
     errors = checks.check_database_connected([])
@@ -256,7 +257,7 @@ def test_check_database_connected_unsuable(mocker):
     assert errors[0].id == health.ERROR_UNUSABLE_DATABASE
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_database_connected_success(mocker):
     errors = checks.check_database_connected([])
     assert errors == []
@@ -272,7 +273,7 @@ def test_check_migrations_applied_cannot_check_migrations(exception, mocker):
     assert errors[0].id == health.INFO_CANT_CHECK_MIGRATIONS
 
 
-@pytest.mark.django_db
+@pytest.mark.django_db()
 def test_check_migrations_applied_unapplied_migrations(mocker):
     mock_loader = mocker.patch("django.db.migrations.loader.MigrationLoader")
     mock_loader.return_value.applied_migrations = ["spam", "eggs"]
@@ -306,7 +307,7 @@ def test_check_migrations_applied_unapplied_migrations(mocker):
 
 
 @pytest.mark.parametrize(
-    "exception,error",
+    ("exception", "error"),
     [
         (redis.ConnectionError, health.ERROR_CANNOT_CONNECT_REDIS),
         (NotImplementedError, health.ERROR_MISSING_REDIS_CLIENT),
diff --git a/tests/fastapi/test_fastapi.py b/tests/fastapi/test_fastapi.py
index 4c51da9..a514f9a 100644
--- a/tests/fastapi/test_fastapi.py
+++ b/tests/fastapi/test_fastapi.py
@@ -20,12 +20,12 @@ def create_app():
     return app
 
 
-@pytest.fixture
+@pytest.fixture()
 def app():
     return create_app()
 
 
-@pytest.fixture
+@pytest.fixture()
 def client(app):
     return TestClient(app)
 
@@ -69,7 +69,7 @@ def test_mozlog_failure(client, mocker, caplog):
         "dockerflow.fastapi.views.get_version", side_effect=ValueError("crash")
     )
 
-    with pytest.raises(ValueError):
+    with pytest.raises(expected_exception=ValueError):
         client.get("/__version__")
 
     record = caplog.records[0]
diff --git a/tests/flask/migrations/env.py b/tests/flask/migrations/env.py
index b9641bc..58e16bb 100755
--- a/tests/flask/migrations/env.py
+++ b/tests/flask/migrations/env.py
@@ -4,7 +4,7 @@
 from logging.config import fileConfig
 
 from alembic import context  # no:qa
-from flask import current_app  # noqa
+from flask import current_app
 from sqlalchemy import engine_from_config, pool
 
 # this is the Alembic Config object, which provides
@@ -24,7 +24,7 @@
 
 # other values from the config, defined by the needs of env.py,
 # can be acquired:
-# my_important_option = config.get_main_option("my_important_option")
+# my_important_option = config.get_main_option("my_important_option")  # noqa
 # ... etc.
 
 
diff --git a/tests/flask/test_flask.py b/tests/flask/test_flask.py
index ac8f09a..857b6b4 100644
--- a/tests/flask/test_flask.py
+++ b/tests/flask/test_flask.py
@@ -34,7 +34,7 @@ def load_user(user_id):
     return MockUser(user_id)
 
 
-@pytest.fixture
+@pytest.fixture()
 def app():
     app = Flask("dockerflow")
     app.secret_key = "super sekrit"
@@ -48,31 +48,31 @@ def client(app):
     return app.test_client()
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow(app):
     return Dockerflow(app)
 
 
 @pytest.fixture()
-def setup_request_summary_logger(dockerflow):
+def _setup_request_summary_logger(dockerflow):
     dockerflow.summary_logger.addHandler(logging.NullHandler())
     dockerflow.summary_logger.setLevel(logging.INFO)
 
 
-@pytest.fixture
+@pytest.fixture()
 def db(app):
     app.config["SQLALCHEMY_DATABASE_URI"] = "sqlite://"
     app.config["SQLALCHEMY_TRACK_MODIFICATIONS"] = False
     return SQLAlchemy(app)
 
 
-@pytest.fixture
+@pytest.fixture()
 def migrate(app, db):
     test_migrations = os.path.join(os.path.dirname(__file__), "migrations")
     return Migrate(app, db, directory=test_migrations)
 
 
-@pytest.fixture
+@pytest.fixture()
 def redis_store(app):
     return FlaskRedis.from_custom_provider(FakeStrictRedis, app)
 
@@ -122,7 +122,6 @@ def version_callback(path):
 
 
 def test_heartbeat(app, dockerflow):
-    # app.debug = True
     response = app.test_client().get("/__heartbeat__")
     assert response.status_code == 200
 
@@ -283,7 +282,8 @@ def assert_log_record(record, errno=0, level=logging.INFO):
 headers = {"User-Agent": "dockerflow/tests", "Accept-Language": "tlh"}
 
 
-def test_request_summary(caplog, app, client, setup_request_summary_logger):
+@pytest.mark.usefixtures("_setup_request_summary_logger")
+def test_request_summary(caplog, app, client):
     caplog.set_level(logging.INFO)
     with app.test_request_context("/"):
         client.get("/", headers=headers)
@@ -297,7 +297,8 @@ def test_request_summary(caplog, app, client, setup_request_summary_logger):
         assert getattr(request, "uid", None) is None
 
 
-def test_request_summary_querystring(caplog, app, client, setup_request_summary_logger):
+@pytest.mark.usefixtures("_setup_request_summary_logger")
+def test_request_summary_querystring(caplog, app, client):
     app.config["DOCKERFLOW_SUMMARY_LOG_QUERYSTRING"] = True
     caplog.set_level(logging.INFO)
     with app.test_request_context("/"):
@@ -498,7 +499,7 @@ def test_check_migrations_applied_unapplied_migrations(mocker, app, db, migrate)
 
 
 @pytest.mark.parametrize(
-    "exception,error",
+    ("exception", "error"),
     [
         (redis.ConnectionError, health.ERROR_CANNOT_CONNECT_REDIS),
         (redis.RedisError, health.ERROR_REDIS_EXCEPTION),
diff --git a/tests/requirements/lint.txt b/tests/requirements/lint.txt
index dd54e5a..eb4e60a 100644
--- a/tests/requirements/lint.txt
+++ b/tests/requirements/lint.txt
@@ -1,5 +1,3 @@
-flake8
-flake8-black
-flake8-isort
+ruff
 twine
 check-manifest
diff --git a/tests/sanic/test_sanic.py b/tests/sanic/test_sanic.py
index 14ea640..c07cde7 100644
--- a/tests/sanic/test_sanic.py
+++ b/tests/sanic/test_sanic.py
@@ -51,7 +51,7 @@ async def fake_redis(*args, **kw):
     return FakeRedis(*args, **kw)
 
 
-@pytest.fixture(scope="function")
+@pytest.fixture()
 def app():
     app = Sanic(f"dockerflow-{uuid.uuid4().hex}")
 
@@ -64,24 +64,24 @@ async def root(request):
     return app
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow(app):
     return Dockerflow(app)
 
 
 @pytest.fixture()
-def setup_request_summary_logger(dockerflow):
+def _setup_request_summary_logger(dockerflow):
     dockerflow.summary_logger.addHandler(logging.NullHandler())
     dockerflow.summary_logger.setLevel(logging.INFO)
 
 
-@pytest.fixture
+@pytest.fixture()
 def dockerflow_redis(app):
     app.config["REDIS"] = {"address": "redis://:password@localhost:6379/0"}
     return Dockerflow(app, redis=SanicRedis(app))
 
 
-@pytest.fixture
+@pytest.fixture()
 def test_client(app):
     return SanicTestClient(app)
 
@@ -210,7 +210,7 @@ def test_redis_check(dockerflow_redis, mocker, test_client):
 
 
 @pytest.mark.parametrize(
-    "error,messages",
+    ("error", "messages"),
     [
         (
             "connection",
@@ -251,16 +251,16 @@ def assert_log_record(caplog, errno=0, level=logging.INFO, rid=None, t=int, path
 headers = {"User-Agent": "dockerflow/tests", "Accept-Language": "tlh"}
 
 
-def test_request_summary(caplog, setup_request_summary_logger, test_client):
+@pytest.mark.usefixtures("_setup_request_summary_logger")
+def test_request_summary(caplog, test_client):
     request, _ = test_client.get(headers=headers)
     assert isinstance(request.ctx.start_timestamp, float)
     assert request.ctx.id is not None
     assert_log_record(caplog, rid=request.ctx.id)
 
 
-def test_request_summary_querystring(
-    app, caplog, setup_request_summary_logger, test_client
-):
+@pytest.mark.usefixtures("_setup_request_summary_logger")
+def test_request_summary_querystring(app, caplog, test_client):
     app.config["DOCKERFLOW_SUMMARY_LOG_QUERYSTRING"] = True
     _, _ = test_client.get("/?x=شكر", headers=headers)
     records = [r for r in caplog.records if r.name == "request.summary"]
@@ -281,9 +281,8 @@ def exception_raiser(request):
     assert record.getMessage() == "exception message"
 
 
-def test_request_summary_failed_request(
-    app, caplog, setup_request_summary_logger, test_client
-):
+@pytest.mark.usefixtures("_setup_request_summary_logger")
+def test_request_summary_failed_request(app, caplog, test_client):
     @app.middleware
     def hostile_callback(request):
         # simulating resetting request changes
diff --git a/tox.ini b/tox.ini
index e76aa0d..c8fd79c 100644
--- a/tox.ini
+++ b/tox.ini
@@ -59,12 +59,8 @@ pip_pre = false
 basepython = python3.8
 deps = -rtests/requirements/lint.txt
 commands =
-    flake8 src/dockerflow tests/
+    ruff check src/ tests/
+    ruff format src/ tests/
     check-manifest -v
     python setup.py sdist
     twine check dist/*
-
-[flake8]
-exclude =
-    .tox
-ignore=E501,E127,E128,E124