Update linting configuration (#1915)

* Update linting configuration

This removes flake8 in favor of ruff, which also provides isort support, and
updates all files to be black, isort, and ruff compliant. This also adds black
and ruff checks to the tox and Github linting workflow.

* Tweak the code coverage config and calls

56 files changed, 344 insertions, 386 deletions

diff --git a/.coveragerc b/.coveragerc
index b78c524..2838512 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -1,16 +1,13 @@
 [run]
+source = rq
 omit =
-    rq/scripts/*
-    rq/compat/*
     rq/contrib/legacy.py
-    rq/dummy.py
     rq/local.py
     rq/tests/*
     tests/*
 
 [report]
 exclude_lines =
+    if __name__ == .__main__.:
     if TYPE_CHECKING:
     pragma: no cover
-    if __name__ == .__main__.:
-        
\ No newline at end of file
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index df3f274..7a3dbca 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -25,15 +25,13 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 black
+        pip install black ruff
 
-    - name: Lint with flake8
+    - name: Lint with black
       run: |
-        # stop the build if there are Python syntax errors or undefined names
-        flake8 . --select=E9,F63,F7,F82 --show-source
-        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --exit-zero --max-complexity=5
+        black --check --skip-string-normalization --line-length 120 rq tests
 
-    - name: Lint with black
+    - name: Lint with ruff
       run: |
-        black -S -l 120 rq/
+        # stop the build if there are Python syntax errors.
+        ruff check --show-source rq tests
diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index 1f77645..67052e8 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -59,7 +59,7 @@ jobs:
 
     - name: Test with pytest
       run: |
-        RUN_SLOW_TESTS_TOO=1 pytest --cov=./ --cov-report=xml --durations=5
+        RUN_SLOW_TESTS_TOO=1 pytest --cov=rq --cov-config=.coveragerc --cov-report=xml --durations=5
 
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v3
@@ -98,7 +98,7 @@ jobs:
 
     - name: Test with pytest
       run: |
-        RUN_SLOW_TESTS_TOO=1 pytest --cov=./ --cov-report=xml --durations=5
+        RUN_SLOW_TESTS_TOO=1 pytest --cov=rq --cov-config=.coveragerc --cov-report=xml --durations=5
 
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v3
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 0000000..d45026b
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,9 @@
+repos:
+  - repo: https://github.com/psf/black
+    rev: 23.3.0
+    hooks:
+        - id: black
+  - repo: https://github.com/charliermarsh/ruff-pre-commit
+    rev: "v0.0.267"
+    hooks:
+      - id: ruff
diff --git a/codecov.yml b/codecov.yml
index aa84c67..6e566ad 100644
--- a/codecov.yml
+++ b/codecov.yml
@@ -1,2 +1,3 @@
 ignore:
+  - setup.py
   - "*/tests/*"
diff --git a/docs/contrib/testing.md b/docs/contrib/testing.md
index f8da71e..3264e43 100644
--- a/docs/contrib/testing.md
+++ b/docs/contrib/testing.md
@@ -37,7 +37,7 @@ RUN_SLOW_TESTS_TOO=1 pytest .
 If you want to analyze the coverage reports, you can use the `--cov` argument to `pytest`. By adding `--cov-report`, you also have some flexibility in terms of the report output format:
 
 ```sh
-RUN_SLOW_TESTS_TOO=1 pytest --cov=./ --cov-report={{report_format}} --durations=5
+RUN_SLOW_TESTS_TOO=1 pytest --cov=rq --cov-config=.coveragerc --cov-report={{report_format}} --durations=5
 ```
 
 Where you replace the `report_format` by the desired format (`term` / `html` / `xml`).
diff --git a/examples/fib.py b/examples/fib.py
index 2130b3c..4ca4493 100644
--- a/examples/fib.py
+++ b/examples/fib.py
@@ -2,4 +2,4 @@ def slow_fib(n):
     if n <= 1:
         return 1
     else:
-        return slow_fib(n-1) + slow_fib(n-2)
+        return slow_fib(n - 1) + slow_fib(n - 2)
diff --git a/examples/run_example.py b/examples/run_example.py
index 93f62bd..43fe163 100644
--- a/examples/run_example.py
+++ b/examples/run_example.py
@@ -1,10 +1,10 @@
 import os
 import time
 
-from rq import Connection, Queue
-
 from fib import slow_fib
 
+from rq import Connection, Queue
+
 
 def main():
     # Range of Fibonacci numbers to compute
diff --git a/pyproject.toml b/pyproject.toml
index 4787b13..ebcd7e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,4 +1,20 @@
 [tool.black]
 line-length = 120
-target-version = ['py36']
-skip-string-normalization = true
\ No newline at end of file
+target-version = ['py38']
+skip-string-normalization = true
+
+[tool.ruff]
+# Set what ruff should check for.
+# See https://beta.ruff.rs/docs/rules/ for a list of rules.
+select = [
+    "E", # pycodestyle errors
+    "F", # pyflakes errors
+    "I", # import sorting
+    "W", # pycodestyle warnings
+]
+line-length = 120  # To match black.
+target-version = 'py38'
+
+[tool.ruff.isort]
+known-first-party = ["rq"]
+section-order = ["future", "standard-library", "third-party", "first-party", "local-folder"]
diff --git a/rq/__init__.py b/rq/__init__.py
index 0ab7065..b385e76 100644
--- a/rq/__init__.py
+++ b/rq/__init__.py
@@ -1,7 +1,6 @@
-# flake8: noqa
-
+# ruff: noqa: F401
 from .connections import Connection, get_current_connection, pop_connection, push_connection
-from .job import cancel_job, get_current_job, requeue_job, Retry, Callback
+from .job import Callback, Retry, cancel_job, get_current_job, requeue_job
 from .queue import Queue
 from .version import VERSION
 from .worker import SimpleWorker, Worker
diff --git a/rq/cli/__init__.py b/rq/cli/__init__.py
index 821f9d7..ec850b8 100644
--- a/rq/cli/__init__.py
+++ b/rq/cli/__init__.py
@@ -1,4 +1,4 @@
-# flake8: noqa
+# ruff: noqa: F401 I001
 from .cli import main
 
 # TODO: the following imports can be removed when we drop the `rqinfo` and
diff --git a/rq/cli/cli.py b/rq/cli/cli.py
index bccde97..eb18293 100755
--- a/rq/cli/cli.py
+++ b/rq/cli/cli.py
@@ -5,45 +5,47 @@ RQ command line tool
 import os
 import sys
 import warnings
-
 from typing import List, Type
 
 import click
 from redis.exceptions import ConnectionError
 
-from rq import Connection, Retry, __version__ as version
+from rq import Connection, Retry
+from rq import __version__ as version
 from rq.cli.helpers import (
+    parse_function_args,
+    parse_schedule,
+    pass_cli_config,
     read_config_file,
     refresh,
     setup_loghandlers_from_args,
     show_both,
     show_queues,
     show_workers,
-    parse_function_args,
-    parse_schedule,
-    pass_cli_config,
 )
 
 # from rq.cli.pool import pool
 from rq.contrib.legacy import cleanup_ghosts
 from rq.defaults import (
-    DEFAULT_RESULT_TTL,
-    DEFAULT_WORKER_TTL,
     DEFAULT_JOB_MONITORING_INTERVAL,
-    DEFAULT_LOGGING_FORMAT,
     DEFAULT_LOGGING_DATE_FORMAT,
+    DEFAULT_LOGGING_FORMAT,
     DEFAULT_MAINTENANCE_TASK_INTERVAL,
+    DEFAULT_RESULT_TTL,
+    DEFAULT_WORKER_TTL,
 )
 from rq.exceptions import InvalidJobOperationError
 from rq.job import Job, JobStatus
 from rq.logutils import blue
 from rq.registry import FailedJobRegistry, clean_registries
 from rq.serializers import DefaultSerializer
-from rq.suspension import suspend as connection_suspend, resume as connection_resume, is_suspended
+from rq.suspension import is_suspended
+from rq.suspension import resume as connection_resume
+from rq.suspension import suspend as connection_suspend
+from rq.utils import get_call_string, import_attribute
 from rq.worker import Worker
 from rq.worker_pool import WorkerPool
 from rq.worker_registration import clean_worker_registry
-from rq.utils import import_attribute, get_call_string
 
 
 @click.group()
diff --git a/rq/cli/helpers.py b/rq/cli/helpers.py
index bea2c37..e585ca7 100644
--- a/rq/cli/helpers.py
+++ b/rq/cli/helpers.py
@@ -1,14 +1,12 @@
-import sys
 import importlib
-import time
 import os
-
-from functools import partial, update_wrapper
-from enum import Enum
-
-from datetime import datetime, timezone, timedelta
-from json import loads, JSONDecodeError
+import sys
+import time
 from ast import literal_eval
+from datetime import datetime, timedelta, timezone
+from enum import Enum
+from functools import partial, update_wrapper
+from json import JSONDecodeError, loads
 from shutil import get_terminal_size
 
 import click
@@ -20,8 +18,8 @@ from rq.defaults import (
     DEFAULT_DEATH_PENALTY_CLASS,
     DEFAULT_JOB_CLASS,
     DEFAULT_QUEUE_CLASS,
-    DEFAULT_WORKER_CLASS,
     DEFAULT_SERIALIZER_CLASS,
+    DEFAULT_WORKER_CLASS,
 )
 from rq.logutils import setup_loghandlers
 from rq.utils import import_attribute, parse_timeout
diff --git a/rq/command.py b/rq/command.py
index 4566ec0..0488d68 100644
--- a/rq/command.py
+++ b/rq/command.py
@@ -1,17 +1,16 @@
 import json
 import os
 import signal
-
-from typing import TYPE_CHECKING, Dict, Any
+from typing import TYPE_CHECKING, Any, Dict
 
 if TYPE_CHECKING:
     from redis import Redis
+
     from .worker import Worker
 
 from rq.exceptions import InvalidJobOperation
 from rq.job import Job
 
-
 PUBSUB_CHANNEL_TEMPLATE = 'rq:pubsub:%s'
 
 
diff --git a/rq/connections.py b/rq/connections.py
index 02b50e3..5d10ea4 100644
--- a/rq/connections.py
+++ b/rq/connections.py
@@ -2,7 +2,8 @@ import warnings
 from contextlib import contextmanager
 from typing import Optional, Tuple, Type
 
-from redis import Connection as RedisConnection, Redis
+from redis import Connection as RedisConnection
+from redis import Redis
 
 from .local import LocalStack
 
diff --git a/rq/contrib/legacy.py b/rq/contrib/legacy.py
index 33ecf18..be44b65 100644
--- a/rq/contrib/legacy.py
+++ b/rq/contrib/legacy.py
@@ -1,7 +1,6 @@
 import logging
-from rq import get_current_connection
-from rq import Worker
 
+from rq import Worker, get_current_connection
 
 logger = logging.getLogger(__name__)
 
diff --git a/rq/decorators.py b/rq/decorators.py
index 2bf46e8..a24101e 100644
--- a/rq/decorators.py
+++ b/rq/decorators.py
@@ -1,8 +1,9 @@
 from functools import wraps
-from typing import TYPE_CHECKING, Callable, Dict, Optional, List, Any, Union
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional, Union
 
 if TYPE_CHECKING:
     from redis import Redis
+
     from .job import Retry
 
 from .defaults import DEFAULT_RESULT_TTL
diff --git a/rq/defaults.py b/rq/defaults.py
index 3744c12..0cea711 100644
--- a/rq/defaults.py
+++ b/rq/defaults.py
@@ -99,4 +99,4 @@ Defaults to the `UnixSignalDeathPenalty` class within the `rq.timeouts` module
 UNSERIALIZABLE_RETURN_VALUE_PAYLOAD = 'Unserializable return value'
 """ The value that we store in the job's _result property or in the Result's return_value
 in case the return value of the actual job is not serializable
-"""
\ No newline at end of file
+"""
diff --git a/rq/job.py b/rq/job.py
index b4ee6a4..7e7e964 100644
--- a/rq/job.py
+++ b/rq/job.py
@@ -1,25 +1,26 @@
+import asyncio
 import inspect
 import json
 import logging
 import warnings
 import zlib
-import asyncio
-
 from datetime import datetime, timedelta, timezone
 from enum import Enum
-from redis import WatchError
-from typing import TYPE_CHECKING, Any, Callable, Dict, Iterable, List, Optional, Tuple, Union, Type
+from typing import TYPE_CHECKING, Any, Callable, Dict, Iterable, List, Optional, Tuple, Type, Union
 from uuid import uuid4
 
+from redis import WatchError
+
 from .defaults import CALLBACK_TIMEOUT, UNSERIALIZABLE_RETURN_VALUE_PAYLOAD
-from .timeouts import JobTimeoutException, BaseDeathPenalty
+from .timeouts import BaseDeathPenalty, JobTimeoutException
 
 if TYPE_CHECKING:
-    from .results import Result
-    from .queue import Queue
     from redis import Redis
     from redis.client import Pipeline
 
+    from .queue import Queue
+    from .results import Result
+
 from .connections import resolve_connection
 from .exceptions import DeserializationError, InvalidJobOperation, NoSuchJobError
 from .local import LocalStack
@@ -167,8 +168,8 @@ class Job:
             func (FunctionReference): The function/method/callable for the Job. This can be
                 a reference to a concrete callable or a string representing the  path of function/method to be
                 imported. Effectively this is the only required attribute when creating a new Job.
-            args (Union[List[Any], Optional[Tuple]], optional): A Tuple / List of positional arguments to pass the callable.
-                Defaults to None, meaning no args being passed.
+            args (Union[List[Any], Optional[Tuple]], optional): A Tuple / List of positional arguments to pass the
+                callable.  Defaults to None, meaning no args being passed.
             kwargs (Optional[Dict], optional): A Dictionary of keyword arguments to pass the callable.
                 Defaults to None, meaning no kwargs being passed.
             connection (Optional[Redis], optional): The Redis connection to use. Defaults to None.
@@ -179,13 +180,16 @@ class Job:
             status (JobStatus, optional): The Job Status. Defaults to None.
             description (Optional[str], optional): The Job Description. Defaults to None.
             depends_on (Union['Dependency', List[Union['Dependency', 'Job']]], optional): What the jobs depends on.
-                This accepts a variaty of different arguments including a `Dependency`, a list of `Dependency` or a `Job`
-                list of `Job`. Defaults to None.
-            timeout (Optional[int], optional): The amount of time in seconds that should be a hardlimit for a job execution. Defaults to None.
+                This accepts a variaty of different arguments including a `Dependency`, a list of `Dependency` or a
+                `Job` list of `Job`. Defaults to None.
+            timeout (Optional[int], optional): The amount of time in seconds that should be a hardlimit for a job
+                execution. Defaults to None.
             id (Optional[str], optional): An Optional ID (str) for the Job. Defaults to None.
             origin (Optional[str], optional): The queue of origin. Defaults to None.
-            meta (Optional[Dict[str, Any]], optional): Custom metadata about the job, takes a dictioanry. Defaults to None.
-            failure_ttl (Optional[int], optional): THe time to live in seconds for failed-jobs information. Defaults to None.
+            meta (Optional[Dict[str, Any]], optional): Custom metadata about the job, takes a dictioanry.
+                Defaults to None.
+            failure_ttl (Optional[int], optional): THe time to live in seconds for failed-jobs information.
+                Defaults to None.
             serializer (Optional[str], optional): The serializer class path to use. Should be a string with the import
                 path for the serializer to use. eg. `mymodule.myfile.MySerializer` Defaults to None.
             on_success (Optional[Callable[..., Any]], optional): A callback function, should be a callable to run
@@ -1081,8 +1085,8 @@ class Job:
         """
         if self.is_canceled:
             raise InvalidJobOperation("Cannot cancel already canceled job: {}".format(self.get_id()))
-        from .registry import CanceledJobRegistry
         from .queue import Queue
+        from .registry import CanceledJobRegistry
 
         pipe = pipeline or self.connection.pipeline()
 
diff --git a/rq/local.py b/rq/local.py
index e6b070b..2fe22c9 100644
--- a/rq/local.py
+++ b/rq/local.py
@@ -1,4 +1,4 @@
-# flake8: noqa
+# ruff: noqa: E731
 """
     werkzeug.local
     ~~~~~~~~~~~~~~
@@ -13,14 +13,14 @@
 # current thread ident.
 try:
     from greenlet import getcurrent as get_ident
-except ImportError:  # noqa
+except ImportError:
     try:
-        from threading import get_ident  # noqa
-    except ImportError:  # noqa
+        from threading import get_ident
+    except ImportError:
         try:
-            from _thread import get_ident  # noqa
-        except ImportError:  # noqa
-            from dummy_thread import get_ident  # noqa
+            from _thread import get_ident
+        except ImportError:
+            from dummy_thread import get_ident
 
 
 def release_local(local):
@@ -120,7 +120,7 @@ class LocalStack:
     def _get__ident_func__(self):
         return self._local.__ident_func__
 
-    def _set__ident_func__(self, value):  # noqa
+    def _set__ident_func__(self, value):
         object.__setattr__(self._local, '__ident_func__', value)
 
     __ident_func__ = property(_get__ident_func__, _set__ident_func__)
@@ -348,7 +348,6 @@ class LocalProxy:
     __invert__ = lambda x: ~(x._get_current_object())
     __complex__ = lambda x: complex(x._get_current_object())
     __int__ = lambda x: int(x._get_current_object())
-    __long__ = lambda x: long(x._get_current_object())
     __float__ = lambda x: float(x._get_current_object())
     __oct__ = lambda x: oct(x._get_current_object())
     __hex__ = lambda x: hex(x._get_current_object())
diff --git a/rq/logutils.py b/rq/logutils.py
index b36ece8..9a1c6c5 100644
--- a/rq/logutils.py
+++ b/rq/logutils.py
@@ -2,7 +2,7 @@ import logging
 import sys
 from typing import Union
 
-from rq.defaults import DEFAULT_LOGGING_FORMAT, DEFAULT_LOGGING_DATE_FORMAT
+from rq.defaults import DEFAULT_LOGGING_DATE_FORMAT, DEFAULT_LOGGING_FORMAT
 
 
 class _Colorizer:
@@ -24,12 +24,12 @@ class _Colorizer:
         light_colors = ["darkgray", "red", "green", "yellow", "blue", "fuchsia", "turquoise", "white"]
 
         x = 30
-        for d, l in zip(dark_colors, light_colors):
-            self.codes[d] = esc + "%im" % x
-            self.codes[l] = esc + "%i;01m" % x
+        for dark, light in zip(dark_colors, light_colors):
+            self.codes[dark] = esc + "%im" % x
+            self.codes[light] = esc + "%i;01m" % x
             x += 1
 
-        del d, l, x
+        del dark, light, x
 
         self.codes["darkteal"] = self.codes["turquoise"]
         self.codes["darkyellow"] = self.codes["brown"]
@@ -117,7 +117,8 @@ def setup_loghandlers(
         level (Union[int, str, None], optional): The log level.
             Access an integer level (10-50) or a string level ("info", "debug" etc). Defaults to None.
         date_format (str, optional): The date format to use. Defaults to DEFAULT_LOGGING_DATE_FORMAT ('%H:%M:%S').
-        log_format (str, optional): The log format to use. Defaults to DEFAULT_LOGGING_FORMAT ('%(asctime)s %(message)s').
+        log_format (str, optional): The log format to use.
+            Defaults to DEFAULT_LOGGING_FORMAT ('%(asctime)s %(message)s').
         name (str, optional): The looger name. Defaults to 'rq.worker'.
     """
     logger = logging.getLogger(name)
diff --git a/rq/queue.py b/rq/queue.py
index f7a0c87..2d74ddf 100644
--- a/rq/queue.py
+++ b/rq/queue.py
@@ -4,9 +4,9 @@ import traceback
 import uuid
 import warnings
 from collections import namedtuple
-from datetime import datetime, timezone, timedelta
+from datetime import datetime, timedelta, timezone
 from functools import total_ordering
-from typing import TYPE_CHECKING, Dict, List, Any, Callable, Optional, Tuple, Type, Union
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional, Tuple, Type, Union
 
 from redis import WatchError
 
@@ -15,18 +15,17 @@ from .timeouts import BaseDeathPenalty, UnixSignalDeathPenalty
 if TYPE_CHECKING:
     from redis import Redis
     from redis.client import Pipeline
+
     from .job import Retry
 
-from .utils import as_text
 from .connections import resolve_connection
 from .defaults import DEFAULT_RESULT_TTL
 from .exceptions import DequeueTimeout, NoSuchJobError
 from .job import Job, JobStatus
 from .logutils import blue, green
-from .types import FunctionReferenceType, JobDependencyType
 from .serializers import resolve_serializer
-from .utils import backend_class, get_version, import_attribute, parse_timeout, utcnow, compact
-
+from .types import FunctionReferenceType, JobDependencyType
+from .utils import as_text, backend_class, compact, get_version, import_attribute, parse_timeout, utcnow
 
 logger = logging.getLogger("rq.queue")
 
@@ -158,9 +157,11 @@ class Queue:
             connection (Optional[Redis], optional): Redis connection. Defaults to None.
             is_async (bool, optional): Whether jobs should run "async" (using the worker).
                 If `is_async` is false, jobs will run on the same process from where it was called. Defaults to True.
-            job_class (Union[str, 'Job', optional): Job class or a string referencing the Job class path. Defaults to None.
+            job_class (Union[str, 'Job', optional): Job class or a string referencing the Job class path.
+                Defaults to None.
             serializer (Any, optional): Serializer. Defaults to None.
-            death_penalty_class (Type[BaseDeathPenalty, optional): Job class or a string referencing the Job class path. Defaults to UnixSignalDeathPenalty.
+            death_penalty_class (Type[BaseDeathPenalty, optional): Job class or a string referencing the Job class path.
+                Defaults to UnixSignalDeathPenalty.
         """
         self.connection = connection or resolve_connection()
         prefix = self.redis_queue_namespace_prefix
diff --git a/rq/registry.py b/rq/registry.py
index acd6bd7..b955d6b 100644
--- a/rq/registry.py
+++ b/rq/registry.py
@@ -1,26 +1,24 @@
 import calendar
 import logging
-import traceback
-
-from rq.serializers import resolve_serializer
 import time
+import traceback
 from datetime import datetime, timedelta, timezone
 from typing import TYPE_CHECKING, Any, List, Optional, Type, Union
 
-from .timeouts import UnixSignalDeathPenalty, BaseDeathPenalty
+from rq.serializers import resolve_serializer
+
+from .timeouts import BaseDeathPenalty, UnixSignalDeathPenalty
 
 if TYPE_CHECKING:
     from redis import Redis
     from redis.client import Pipeline
 
-from .utils import as_text
 from .connections import resolve_connection
 from .defaults import DEFAULT_FAILURE_TTL
-from .exceptions import InvalidJobOperation, NoSuchJobError, AbandonedJobError
+from .exceptions import AbandonedJobError, InvalidJobOperation, NoSuchJobError
 from .job import Job, JobStatus
 from .queue import Queue
-from .utils import backend_class, current_timestamp
-
+from .utils import as_text, backend_class, current_timestamp
 
 logger = logging.getLogger("rq.registry")
 
@@ -237,8 +235,9 @@ class StartedJobRegistry(BaseRegistry):
                     except NoSuchJobError:
                         continue
 
-                    job.execute_failure_callback(self.death_penalty_class, AbandonedJobError, AbandonedJobError(),
-                                                 traceback.extract_stack())
+                    job.execute_failure_callback(
+                        self.death_penalty_class, AbandonedJobError, AbandonedJobError(), traceback.extract_stack()
+                    )
 
                     retry = job.retries_left and job.retries_left > 0
 
@@ -248,8 +247,10 @@ class StartedJobRegistry(BaseRegistry):
 
                     else:
                         exc_string = f"due to {AbandonedJobError.__name__}"
-                        logger.warning(f'{self.__class__.__name__} cleanup: Moving job to {FailedJobRegistry.__name__} '
-                                       f'({exc_string})')
+                        logger.warning(
+                            f'{self.__class__.__name__} cleanup: Moving job to {FailedJobRegistry.__name__} '
+                            f'({exc_string})'
+                        )
                         job.set_status(JobStatus.FAILED)
                         job._exc_info = f"Moved to {FailedJobRegistry.__name__}, {exc_string}, at {datetime.now()}"
                         job.save(pipeline=pipeline, include_meta=False)
diff --git a/rq/results.py b/rq/results.py
index fdbb763..27bab15 100644
--- a/rq/results.py
+++ b/rq/results.py
@@ -1,16 +1,15 @@
-from typing import Any, Optional
 import zlib
-
 from base64 import b64decode, b64encode
 from datetime import datetime, timezone
 from enum import Enum
+from typing import Any, Optional
+
 from redis import Redis
 
 from .defaults import UNSERIALIZABLE_RETURN_VALUE_PAYLOAD
-from .utils import decode_redis_hash
 from .job import Job
 from .serializers import resolve_serializer
-from .utils import now
+from .utils import decode_redis_hash, now
 
 
 def get_key(job_id):
diff --git a/rq/scheduler.py b/rq/scheduler.py
index a64b400..97d627c 100644
--- a/rq/scheduler.py
+++ b/rq/scheduler.py
@@ -8,7 +8,7 @@ from enum import Enum
 from multiprocessing import Process
 from typing import List, Set
 
-from redis import ConnectionPool, Redis, SSLConnection, UnixDomainSocketConnection
+from redis import ConnectionPool, Redis
 
 from .connections import parse_connection
 from .defaults import DEFAULT_LOGGING_DATE_FORMAT, DEFAULT_LOGGING_FORMAT, DEFAULT_SCHEDULER_FALLBACK_PERIOD
diff --git a/rq/serializers.py b/rq/serializers.py
index 96de3f5..94eddbf 100644
--- a/rq/serializers.py
+++ b/rq/serializers.py
@@ -1,6 +1,6 @@
-from functools import partial
-import pickle
 import json
+import pickle
+from functools import partial
 from typing import Optional, Type, Union
 
 from .utils import import_attribute
diff --git a/rq/suspension.py b/rq/suspension.py
index 77df9b8..10af5ba 100644
--- a/rq/suspension.py
+++ b/rq/suspension.py
@@ -2,6 +2,7 @@ from typing import TYPE_CHECKING, Optional
 
 if TYPE_CHECKING:
     from redis import Redis
+
     from rq.worker import Worker
 
 
diff --git a/rq/utils.py b/rq/utils.py
index db483ab..5e61983 100644
--- a/rq/utils.py
+++ b/rq/utils.py
@@ -7,16 +7,16 @@ terminal colorizing code, originally by Georg Brandl.
 
 import calendar
 import datetime
+import datetime as dt
 import importlib
 import logging
 import numbers
-import sys
-import datetime as dt
 from collections.abc import Iterable
-from typing import TYPE_CHECKING, Dict, List, Optional, Any, Callable, Tuple, Union
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional, Tuple, Union
 
 if TYPE_CHECKING:
     from redis import Redis
+
     from .queue import Queue
 
 from redis.exceptions import ResponseError
diff --git a/rq/worker.py b/rq/worker.py
index ade789b..062b1b4 100644
--- a/rq/worker.py
+++ b/rq/worker.py
@@ -13,8 +13,8 @@ import warnings
 from datetime import datetime, timedelta
 from enum import Enum
 from random import shuffle
-from typing import TYPE_CHECKING, Any, Callable, List, Optional, Tuple, Type, Union
 from types import FrameType
+from typing import TYPE_CHECKING, Callable, List, Optional, Tuple, Type, Union
 from uuid import uuid4
 
 if TYPE_CHECKING:
@@ -35,19 +35,17 @@ from contextlib import suppress
 import redis.exceptions
 
 from . import worker_registration
-from .command import parse_payload, PUBSUB_CHANNEL_TEMPLATE, handle_command
-from .connections import get_current_connection, push_connection, pop_connection
-
+from .command import PUBSUB_CHANNEL_TEMPLATE, handle_command, parse_payload
+from .connections import get_current_connection, pop_connection, push_connection
 from .defaults import (
+    DEFAULT_JOB_MONITORING_INTERVAL,
+    DEFAULT_LOGGING_DATE_FORMAT,
+    DEFAULT_LOGGING_FORMAT,
     DEFAULT_MAINTENANCE_TASK_INTERVAL,
     DEFAULT_RESULT_TTL,
     DEFAULT_WORKER_TTL,
-    DEFAULT_JOB_MONITORING_INTERVAL,
-    DEFAULT_LOGGING_FORMAT,
-    DEFAULT_LOGGING_DATE_FORMAT,
 )
-from .exceptions import DeserializationError, DequeueTimeout, ShutDownImminentException
-
+from .exceptions import DequeueTimeout, DeserializationError, ShutDownImminentException
 from .job import Job, JobStatus
 from .logutils import blue, green, setup_loghandlers, yellow
 from .queue import Queue
@@ -55,20 +53,19 @@ from .registry import StartedJobRegistry, clean_registries
 from .scheduler import RQScheduler
 from .serializers import resolve_serializer
 from .suspension import is_suspended
-from .timeouts import JobTimeoutException, HorseMonitorTimeoutException, UnixSignalDeathPenalty
+from .timeouts import HorseMonitorTimeoutException, JobTimeoutException, UnixSignalDeathPenalty
 from .utils import (
+    as_text,
     backend_class,
+    compact,
     ensure_list,
     get_version,
     utcformat,
     utcnow,
     utcparse,
-    compact,
-    as_text,
 )
 from .version import VERSION
 
-
 try:
     from setproctitle import setproctitle as setprocname
 except ImportError:
@@ -373,7 +370,8 @@ class BaseWorker:
             max_jobs (Optional[int], optional): Max number of jobs. Defaults to None.
             max_idle_time (Optional[int], optional): Max seconds for worker to be idle. Defaults to None.
             with_scheduler (bool, optional): Whether to run the scheduler in a separate process. Defaults to False.
-            dequeue_strategy (DequeueStrategy, optional): Which strategy to use to dequeue jobs. Defaults to DequeueStrategy.DEFAULT
+            dequeue_strategy (DequeueStrategy, optional): Which strategy to use to dequeue jobs.
+                Defaults to DequeueStrategy.DEFAULT
 
         Returns:
             worked (bool): Will return True if any job was processed, False otherwise.
diff --git a/rq/worker_pool.py b/rq/worker_pool.py
index 005c3b9..b161cc8 100644
--- a/rq/worker_pool.py
+++ b/rq/worker_pool.py
@@ -4,17 +4,14 @@ import logging
 import os
 import signal
 import time
-
 from enum import Enum
 from multiprocessing import Process
-from typing import Dict, List, NamedTuple, Optional, Set, Type, Union
+from typing import Dict, List, NamedTuple, Optional, Type, Union
 from uuid import uuid4
 
-from redis import Redis
-from redis import ConnectionPool
-from rq.serializers import DefaultSerializer
+from redis import ConnectionPool, Redis
 
-from rq.timeouts import HorseMonitorTimeoutException, UnixSignalDeathPenalty
+from rq.serializers import DefaultSerializer
 
 from .connections import parse_connection
 from .defaults import DEFAULT_LOGGING_DATE_FORMAT, DEFAULT_LOGGING_FORMAT
diff --git a/rq/worker_registration.py b/rq/worker_registration.py
index fe4dc04..838c63f 100644
--- a/rq/worker_registration.py
+++ b/rq/worker_registration.py
@@ -1,15 +1,16 @@
-from typing import Optional, TYPE_CHECKING, Any, Set
+from typing import TYPE_CHECKING, Optional, Set
 
 if TYPE_CHECKING:
     from redis import Redis
     from redis.client import Pipeline
-    from .worker import Worker
-    from .queue import Queue
 
-from .utils import as_text
+    from .queue import Queue
+    from .worker import Worker
 
 from rq.utils import split_list
 
+from .utils import as_text
+
 WORKERS_BY_QUEUE_KEY = 'rq:workers:%s'
 REDIS_WORKER_KEYS = 'rq:workers'
 MAX_KEYS = 1000
diff --git a/setup.cfg b/setup.cfg
index 9cc24f6..f873f9b 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -4,9 +4,3 @@ requires = redis >= 3.0.0
 
 [wheel]
 universal = 1
-
-[flake8]
-max-line-length=120
-ignore=E731
-count=True
-statistics=True
diff --git a/setup.py b/setup.py
index 221e223..ceaf034 100644
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,8 @@ rq is a simple, lightweight, library for creating background jobs, and
 processing them.
 """
 import os
-from setuptools import setup, find_packages
+
+from setuptools import find_packages, setup
 
 
 def get_version():
@@ -33,11 +34,10 @@ setup(
     license='BSD',
     author='Vincent Driessen',
     author_email='vincent@3rdcloud.com',
-    description='RQ is a simple, lightweight, library for creating background '
-                'jobs, and processing them.',
+    description='RQ is a simple, lightweight, library for creating background jobs, and processing them.',
     long_description=__doc__,
     packages=find_packages(exclude=['tests', 'tests.*']),
-    package_data = {"rq": ["py.typed"]},
+    package_data={"rq": ["py.typed"]},
     include_package_data=True,
     zip_safe=False,
     platforms='any',
@@ -46,7 +46,6 @@ setup(
     entry_points={
         'console_scripts': [
             'rq = rq.cli:main',
-
             # NOTE: rqworker/rqinfo are kept for backward-compatibility,
             # remove eventually (TODO)
             'rqinfo = rq.cli:info',
@@ -85,6 +84,5 @@ setup(
         'Topic :: System :: Distributed Computing',
         'Topic :: System :: Systems Administration',
         'Topic :: System :: Monitoring',
-
-    ]
+    ],
 )
diff --git a/tests/__init__.py b/tests/__init__.py
index 36b2bc6..9da4687 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -1,10 +1,10 @@
 import logging
 import os
+import unittest
 
 from redis import Redis
-from rq import pop_connection, push_connection
 
-import unittest
+from rq import pop_connection, push_connection
 
 
 def find_empty_redis_database(ssl=False):
diff --git a/tests/fixtures.py b/tests/fixtures.py
index 4536c3c..62ea8e1 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -3,16 +3,17 @@ This file contains all jobs that are used in tests.  Each of these test
 fixtures has a slightly different characteristics.
 """
 
+import contextlib
 import os
-import time
 import signal
-import sys
 import subprocess
-import contextlib
+import sys
+import time
 from multiprocessing import Process
 
 from redis import Redis
-from rq import Connection, get_current_job, get_current_connection, Queue
+
+from rq import Connection, Queue, get_current_connection, get_current_job
 from rq.command import send_kill_horse_command, send_shutdown_command
 from rq.decorators import job
 from rq.job import Job
diff --git a/tests/test_callbacks.py b/tests/test_callbacks.py
index 680ee38..c47ad84 100644
--- a/tests/test_callbacks.py
+++ b/tests/test_callbacks.py
@@ -1,15 +1,13 @@
 from datetime import timedelta
 
-from tests import RQTestCase
-from tests.fixtures import div_by_zero, erroneous_callback, save_exception, save_result, say_hello
-
 from rq import Queue, Worker
-from rq.job import Job, JobStatus, UNEVALUATED
+from rq.job import UNEVALUATED, Job, JobStatus
 from rq.worker import SimpleWorker
+from tests import RQTestCase
+from tests.fixtures import div_by_zero, erroneous_callback, save_exception, save_result, say_hello
 
 
 class QueueCallbackTestCase(RQTestCase):
-
     def test_enqueue_with_success_callback(self):
         """Test enqueue* methods with on_success"""
         queue = Queue(connection=self.testconn)
@@ -54,10 +52,7 @@ class SyncJobCallback(RQTestCase):
 
         job = queue.enqueue(say_hello, on_success=save_result)
         self.assertEqual(job.get_status(), JobStatus.FINISHED)
-        self.assertEqual(
-            self.testconn.get('success_callback:%s' % job.id).decode(),
-            job.result
-        )
+        self.assertEqual(self.testconn.get('success_callback:%s' % job.id).decode(), job.result)
 
         job = queue.enqueue(div_by_zero, on_success=save_result)
         self.assertEqual(job.get_status(), JobStatus.FAILED)
@@ -69,8 +64,7 @@ class SyncJobCallback(RQTestCase):
 
         job = queue.enqueue(div_by_zero, on_failure=save_exception)
         self.assertEqual(job.get_status(), JobStatus.FAILED)
-        self.assertIn('div_by_zero',
-                      self.testconn.get('failure_callback:%s' % job.id).decode())
+        self.assertIn('div_by_zero', self.testconn.get('failure_callback:%s' % job.id).decode())
 
         job = queue.enqueue(div_by_zero, on_success=save_result)
         self.assertEqual(job.get_status(), JobStatus.FAILED)
@@ -88,10 +82,7 @@ class WorkerCallbackTestCase(RQTestCase):
         # Callback is executed when job is successfully executed
         worker.work(burst=True)
         self.assertEqual(job.get_status(), JobStatus.FINISHED)
-        self.assertEqual(
-            self.testconn.get('success_callback:%s' % job.id).decode(),
-            job.return_value()
-        )
+        self.assertEqual(self.testconn.get('success_callback:%s' % job.id).decode(), job.return_value())
 
         job = queue.enqueue(div_by_zero, on_success=save_result)
         worker.work(burst=True)
@@ -120,8 +111,7 @@ class WorkerCallbackTestCase(RQTestCase):
         self.assertEqual(job.get_status(), JobStatus.FAILED)
         job.refresh()
         print(job.exc_info)
-        self.assertIn('div_by_zero',
-                      self.testconn.get('failure_callback:%s' % job.id).decode())
+        self.assertIn('div_by_zero', self.testconn.get('failure_callback:%s' % job.id).decode())
 
         job = queue.enqueue(div_by_zero, on_success=save_result)
         worker.work(burst=True)
@@ -132,7 +122,6 @@ class WorkerCallbackTestCase(RQTestCase):
 
 
 class JobCallbackTestCase(RQTestCase):
-
     def test_job_creation_with_success_callback(self):
         """Ensure callbacks are created and persisted properly"""
         job = Job.create(say_hello)
diff --git a/tests/test_cli.py b/tests/test_cli.py
index 79ac12d..1767a3e 100644
--- a/tests/test_cli.py
+++ b/tests/test_cli.py
@@ -1,26 +1,22 @@
-from datetime import datetime, timezone, timedelta
+import json
+import os
+from datetime import datetime, timedelta, timezone
 from time import sleep
 from uuid import uuid4
 
-import os
-import json
-
-from click import BadParameter
+import pytest
 from click.testing import CliRunner
 from redis import Redis
 
 from rq import Queue
 from rq.cli import main
-from rq.cli.helpers import read_config_file, CliConfig, parse_function_arg, parse_schedule
+from rq.cli.helpers import CliConfig, parse_function_arg, parse_schedule, read_config_file
 from rq.job import Job, JobStatus
 from rq.registry import FailedJobRegistry, ScheduledJobRegistry
+from rq.scheduler import RQScheduler
 from rq.serializers import JSONSerializer
 from rq.timeouts import UnixSignalDeathPenalty
 from rq.worker import Worker, WorkerStatus
-from rq.scheduler import RQScheduler
-
-import pytest
-
 from tests import RQTestCase
 from tests.fixtures import div_by_zero, say_hello
 
@@ -809,7 +805,7 @@ class WorkerPoolCLITestCase(CLITestCase):
         queue = Queue('bar', connection=self.connection, serializer=JSONSerializer)
         job_2 = queue.enqueue(say_hello, 'Hello')
         runner = CliRunner()
-        result = runner.invoke(
+        runner.invoke(
             main,
             ['worker-pool', 'foo', 'bar', '-u', self.redis_url, '-b', '--serializer', 'rq.serializers.JSONSerializer'],
         )
diff --git a/tests/test_commands.py b/tests/test_commands.py
index f98a0ec..355b72a 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -1,17 +1,15 @@
 import time
-
 from multiprocessing import Process
 
 from redis import Redis
 
-from tests import RQTestCase
-from tests.fixtures import long_running_job, _send_kill_horse_command, _send_shutdown_command
-
 from rq import Queue, Worker
 from rq.command import send_command, send_kill_horse_command, send_shutdown_command, send_stop_job_command
 from rq.exceptions import InvalidJobOperation, NoSuchJobError
 from rq.serializers import JSONSerializer
 from rq.worker import WorkerStatus
+from tests import RQTestCase
+from tests.fixtures import _send_kill_horse_command, _send_shutdown_command, long_running_job
 
 
 def start_work(queue_name, worker_name, connection_kwargs):
diff --git a/tests/test_decorator.py b/tests/test_decorator.py
index fb945e5..69ddde1 100644
--- a/tests/test_decorator.py
+++ b/tests/test_decorator.py
@@ -11,13 +11,11 @@ from tests.fixtures import decorated_job
 
 
 class TestDecorator(RQTestCase):
-
     def setUp(self):
         super().setUp()
 
     def test_decorator_preserves_functionality(self):
-        """Ensure that a decorated function's functionality is still preserved.
-        """
+        """Ensure that a decorated function's functionality is still preserved."""
         self.assertEqual(decorated_job(1, 2), 3)
 
     def test_decorator_adds_delay_attr(self):
@@ -34,9 +32,11 @@ class TestDecorator(RQTestCase):
         """Ensure that passing in queue name to the decorator puts the job in
         the right queue.
         """
+
         @job(queue='queue_name')
         def hello():
             return 'Hi'
+
         result = hello.delay()
         self.assertEqual(result.origin, 'queue_name')
 
@@ -51,12 +51,12 @@ class TestDecorator(RQTestCase):
         @job('default', result_ttl=10)
         def hello():
             return 'Why hello'
+
         result = hello.delay()
         self.assertEqual(result.result_ttl, 10)
 
     def test_decorator_accepts_ttl_as_argument(self):
-        """Ensure that passing in ttl to the decorator sets the ttl on the job
-        """
+        """Ensure that passing in ttl to the decorator sets the ttl on the job"""
         # Ensure default
         result = decorated_job.delay(1, 2)
         self.assertEqual(result.ttl, None)
@@ -64,12 +64,12 @@ class TestDecorator(RQTestCase):
         @job('default', ttl=30)
         def hello():
             return 'Hello'
+
         result = hello.delay()
         self.assertEqual(result.ttl, 30)
 
     def test_decorator_accepts_meta_as_argument(self):
-        """Ensure that passing in meta to the decorator sets the meta on the job
-        """
+        """Ensure that passing in meta to the decorator sets the meta on the job"""
         # Ensure default
         result = decorated_job.delay(1, 2)
         self.assertEqual(result.meta, {})
@@ -82,6 +82,7 @@ class TestDecorator(RQTestCase):
         @job('default', meta=test_meta)
         def hello():
             return 'Hello'
+
         result = hello.delay()
         self.assertEqual(result.meta, test_meta)
 
@@ -153,16 +154,19 @@ class TestDecorator(RQTestCase):
         """Ensure that passing in on_failure function to the decorator sets the
         correct on_failure function on the job.
         """
+
         # Only functions and builtins are supported as callback
         @job('default', on_failure=Job.fetch)
         def foo():
             return 'Foo'
+
         with self.assertRaises(ValueError):
             result = foo.delay()
 
         @job('default', on_failure=print)
         def hello():
             return 'Hello'
+
         result = hello.delay()
         result_job = Job.fetch(id=result.id, connection=self.testconn)
         self.assertEqual(result_job.failure_callback, print)
@@ -171,23 +175,26 @@ class TestDecorator(RQTestCase):
         """Ensure that passing in on_failure function to the decorator sets the
         correct on_success function on the job.
         """
+
         # Only functions and builtins are supported as callback
         @job('default', on_failure=Job.fetch)
         def foo():
             return 'Foo'
+
         with self.assertRaises(ValueError):
             result = foo.delay()
 
         @job('default', on_success=print)
         def hello():
             return 'Hello'
+
         result = hello.delay()
         result_job = Job.fetch(id=result.id, connection=self.testconn)
         self.assertEqual(result_job.success_callback, print)
 
     @mock.patch('rq.queue.resolve_connection')
     def test_decorator_connection_laziness(self, resolve_connection):
-        """Ensure that job decorator resolve connection in `lazy` way """
+        """Ensure that job decorator resolve connection in `lazy` way"""
 
         resolve_connection.return_value = Redis()
 
@@ -207,12 +214,11 @@ class TestDecorator(RQTestCase):
 
     def test_decorator_custom_queue_class(self):
         """Ensure that a custom queue class can be passed to the job decorator"""
+
         class CustomQueue(Queue):
             pass
-        CustomQueue.enqueue_call = mock.MagicMock(
-            spec=lambda *args, **kwargs: None,
-            name='enqueue_call'
-        )
+
+        CustomQueue.enqueue_call = mock.MagicMock(spec=lambda *args, **kwargs: None, name='enqueue_call')
 
         custom_decorator = job(queue='default', queue_class=CustomQueue)
         self.assertIs(custom_decorator.queue_class, CustomQueue)
@@ -226,12 +232,11 @@ class TestDecorator(RQTestCase):
 
     def test_decorate_custom_queue(self):
         """Ensure that a custom queue instance can be passed to the job decorator"""
+
         class CustomQueue(Queue):
             pass
-        CustomQueue.enqueue_call = mock.MagicMock(
-            spec=lambda *args, **kwargs: None,
-            name='enqueue_call'
-        )
+
+        CustomQueue.enqueue_call = mock.MagicMock(spec=lambda *args, **kwargs: None, name='enqueue_call')
         queue = CustomQueue()
 
         @job(queue=queue)
@@ -252,11 +257,12 @@ class TestDecorator(RQTestCase):
         @job('default', failure_ttl=10)
         def hello():
             return 'Why hello'
+
         result = hello.delay()
         self.assertEqual(result.failure_ttl, 10)
 
     def test_decorator_custom_retry(self):
-        """ Ensure that passing in retry to the decorator sets the
+        """Ensure that passing in retry to the decorator sets the
         retry on the job
         """
         # Ensure default
@@ -267,6 +273,7 @@ class TestDecorator(RQTestCase):
         @job('default', retry=Retry(3, [2]))
         def hello():
             return 'Why hello'
+
         result = hello.delay()
         self.assertEqual(result.retries_left, 3)
         self.assertEqual(result.retry_intervals, [2])
diff --git a/tests/test_dependencies.py b/tests/test_dependencies.py
index a290a87..13400f7 100644
--- a/tests/test_dependencies.py
+++ b/tests/test_dependencies.py
@@ -1,12 +1,10 @@
+from rq import Queue, SimpleWorker, Worker
+from rq.job import Dependency, Job, JobStatus
 from tests import RQTestCase
 from tests.fixtures import check_dependencies_are_met, div_by_zero, say_hello
 
-from rq import Queue, SimpleWorker, Worker
-from rq.job import Job, JobStatus, Dependency
-
 
 class TestDependencies(RQTestCase):
-
     def test_allow_failure_is_persisted(self):
         """Ensure that job.allow_dependency_failures is properly set
         when providing Dependency object to depends_on."""
@@ -70,10 +68,8 @@ class TestDependencies(RQTestCase):
         # When a failing job has multiple dependents, only enqueue those
         # with allow_failure=True
         parent_job = q.enqueue(div_by_zero)
-        job_allow_failure = q.enqueue(say_hello,
-                                      depends_on=Dependency(jobs=parent_job, allow_failure=True))
-        job = q.enqueue(say_hello,
-                        depends_on=Dependency(jobs=parent_job, allow_failure=False))
+        job_allow_failure = q.enqueue(say_hello, depends_on=Dependency(jobs=parent_job, allow_failure=True))
+        job = q.enqueue(say_hello, depends_on=Dependency(jobs=parent_job, allow_failure=False))
         w.work(burst=True, max_jobs=1)
         self.assertEqual(parent_job.get_status(), JobStatus.FAILED)
         self.assertEqual(job_allow_failure.get_status(), JobStatus.QUEUED)
@@ -101,22 +97,12 @@ class TestDependencies(RQTestCase):
         # Test dependant is enqueued at front
         q.empty()
         parent_job = q.enqueue(say_hello)
-        q.enqueue(
-            say_hello,
-            job_id='fake_job_id_1',
-            depends_on=Dependency(jobs=[parent_job])
-        )
-        q.enqueue(
-            say_hello,
-            job_id='fake_job_id_2',
-            depends_on=Dependency(jobs=[parent_job],enqueue_at_front=True)
-        )
-        #q.enqueue(say_hello) # This is a filler job that will act as a separator for jobs, one will be enqueued at front while the other one at the end of the queue
+        q.enqueue(say_hello, job_id='fake_job_id_1', depends_on=Dependency(jobs=[parent_job]))
+        q.enqueue(say_hello, job_id='fake_job_id_2', depends_on=Dependency(jobs=[parent_job], enqueue_at_front=True))
         w.work(burst=True, max_jobs=1)
 
         self.assertEqual(q.job_ids, ["fake_job_id_2", "fake_job_id_1"])
 
-
     def test_dependency_list_in_depends_on(self):
         """Enqueue with Dependency list in depends_on"""
         q = Queue(connection=self.testconn)
@@ -129,7 +115,6 @@ class TestDependencies(RQTestCase):
         w.work(burst=True)
         self.assertEqual(job.get_status(), JobStatus.FINISHED)
 
-
     def test_enqueue_job_dependency(self):
         """Enqueue via Queue.enqueue_job() with depencency"""
         q = Queue(connection=self.testconn)
@@ -147,7 +132,6 @@ class TestDependencies(RQTestCase):
         self.assertEqual(parent_job.get_status(), JobStatus.FINISHED)
         self.assertEqual(job.get_status(), JobStatus.FINISHED)
 
-
     def test_dependencies_are_met_if_parent_is_canceled(self):
         """When parent job is canceled, it should be treated as failed"""
         queue = Queue(connection=self.testconn)
diff --git a/tests/test_fixtures.py b/tests/test_fixtures.py
index 383ba15..1517b80 100644
--- a/tests/test_fixtures.py
+++ b/tests/test_fixtures.py
@@ -1,5 +1,4 @@
 from rq import Queue
-
 from tests import RQTestCase, fixtures
 
 
diff --git a/tests/test_helpers.py b/tests/test_helpers.py
index 5a84f71..c351b77 100644
--- a/tests/test_helpers.py
+++ b/tests/test_helpers.py
@@ -1,16 +1,14 @@
-from rq.cli.helpers import get_redis_from_config
+from unittest import mock
 
+from rq.cli.helpers import get_redis_from_config
 from tests import RQTestCase
-from unittest import mock
 
-class TestHelpers(RQTestCase):
 
+class TestHelpers(RQTestCase):
     @mock.patch('rq.cli.helpers.Sentinel')
     def test_get_redis_from_config(self, sentinel_class_mock):
         """Ensure Redis connection params are properly parsed"""
-        settings = {
-            'REDIS_URL': 'redis://localhost:1/1'
-        }
+        settings = {'REDIS_URL': 'redis://localhost:1/1'}
 
         # Ensure REDIS_URL is read
         redis = get_redis_from_config(settings)
@@ -23,7 +21,7 @@ class TestHelpers(RQTestCase):
             'REDIS_HOST': 'foo',
             'REDIS_DB': 2,
             'REDIS_PORT': 2,
-            'REDIS_PASSWORD': 'bar'
+            'REDIS_PASSWORD': 'bar',
         }
 
         # Ensure REDIS_URL is preferred
@@ -42,23 +40,29 @@ class TestHelpers(RQTestCase):
         self.assertEqual(connection_kwargs['password'], 'bar')
 
         # Add Sentinel to the settings
-        settings.update({
-            'SENTINEL': {
-                'INSTANCES':[('remote.host1.org', 26379), ('remote.host2.org', 26379), ('remote.host3.org', 26379)],
-                'MASTER_NAME': 'master',
-                'DB': 2,
-                'USERNAME': 'redis-user',
-                'PASSWORD': 'redis-secret',
-                'SOCKET_TIMEOUT': None,
-                'CONNECTION_KWARGS': {
-                    'ssl_ca_path': None,
-                },
-                'SENTINEL_KWARGS': {
-                    'username': 'sentinel-user',
-                    'password': 'sentinel-secret',
+        settings.update(
+            {
+                'SENTINEL': {
+                    'INSTANCES': [
+                        ('remote.host1.org', 26379),
+                        ('remote.host2.org', 26379),
+                        ('remote.host3.org', 26379),
+                    ],
+                    'MASTER_NAME': 'master',
+                    'DB': 2,
+                    'USERNAME': 'redis-user',
+                    'PASSWORD': 'redis-secret',
+                    'SOCKET_TIMEOUT': None,
+                    'CONNECTION_KWARGS': {
+                        'ssl_ca_path': None,
+                    },
+                    'SENTINEL_KWARGS': {
+                        'username': 'sentinel-user',
+                        'password': 'sentinel-secret',
+                    },
                 },
-            },
-        })
+            }
+        )
 
         # Ensure SENTINEL is preferred against REDIS_* parameters
         redis = get_redis_from_config(settings)
@@ -66,7 +70,7 @@ class TestHelpers(RQTestCase):
         sentinel_init_sentinel_kwargs = sentinel_class_mock.call_args[1]
         self.assertEqual(
             sentinel_init_sentinels_args,
-            ([('remote.host1.org', 26379), ('remote.host2.org', 26379), ('remote.host3.org', 26379)],)
+            ([('remote.host1.org', 26379), ('remote.host2.org', 26379), ('remote.host3.org', 26379)],),
         )
         self.assertDictEqual(
             sentinel_init_sentinel_kwargs,
@@ -80,6 +84,6 @@ class TestHelpers(RQTestCase):
                 'sentinel_kwargs': {
                     'username': 'sentinel-user',
                     'password': 'sentinel-secret',
-                }
-            }
+                },
+            },
         )
diff --git a/tests/test_job.py b/tests/test_job.py
index 318c41b..444080f 100644
--- a/tests/test_job.py
+++ b/tests/test_job.py
@@ -1,32 +1,29 @@
 import json
-
-from rq.defaults import CALLBACK_TIMEOUT
-from rq.serializers import JSONSerializer
-import time
 import queue
+import time
 import zlib
 from datetime import datetime, timedelta
+from pickle import dumps, loads
 
 from redis import WatchError
 
-from rq.utils import as_text
+from rq.defaults import CALLBACK_TIMEOUT
 from rq.exceptions import DeserializationError, InvalidJobOperation, NoSuchJobError
-from rq.job import Job, JobStatus, Dependency, cancel_job, get_current_job, Callback
+from rq.job import Callback, Dependency, Job, JobStatus, cancel_job, get_current_job
 from rq.queue import Queue
 from rq.registry import (
     CanceledJobRegistry,
     DeferredJobRegistry,
     FailedJobRegistry,
     FinishedJobRegistry,
-    StartedJobRegistry,
     ScheduledJobRegistry,
+    StartedJobRegistry,
 )
-from rq.utils import utcformat, utcnow
+from rq.serializers import JSONSerializer
+from rq.utils import as_text, utcformat, utcnow
 from rq.worker import Worker
 from tests import RQTestCase, fixtures
 
-from pickle import loads, dumps
-
 
 class TestJob(RQTestCase):
     def test_unicode(self):
diff --git a/tests/test_queue.py b/tests/test_queue.py
index d352736..e91ae54 100644
--- a/tests/test_queue.py
+++ b/tests/test_queue.py
@@ -1,9 +1,8 @@
 import json
 from datetime import datetime, timedelta, timezone
-from rq.serializers import JSONSerializer
 from unittest.mock import patch
 
-from rq import Retry, Queue
+from rq import Queue, Retry
 from rq.job import Job, JobStatus
 from rq.registry import (
     CanceledJobRegistry,
@@ -13,10 +12,10 @@ from rq.registry import (
     ScheduledJobRegistry,
     StartedJobRegistry,
 )
+from rq.serializers import JSONSerializer
 from rq.worker import Worker
-
 from tests import RQTestCase
-from tests.fixtures import CustomJob, echo, say_hello
+from tests.fixtures import echo, say_hello
 
 
 class MultipleDependencyJob(Job):
diff --git a/tests/test_registry.py b/tests/test_registry.py
index 57584b5..5dd0be6 100644
--- a/tests/test_registry.py
+++ b/tests/test_registry.py
@@ -1,20 +1,22 @@
 from datetime import datetime, timedelta
 from unittest import mock
-from unittest.mock import PropertyMock, ANY
+from unittest.mock import ANY
 
-from rq.serializers import JSONSerializer
-
-from rq.utils import as_text
 from rq.defaults import DEFAULT_FAILURE_TTL
-from rq.exceptions import InvalidJobOperation, AbandonedJobError
+from rq.exceptions import AbandonedJobError, InvalidJobOperation
 from rq.job import Job, JobStatus, requeue_job
 from rq.queue import Queue
-from rq.utils import current_timestamp
+from rq.registry import (
+    CanceledJobRegistry,
+    DeferredJobRegistry,
+    FailedJobRegistry,
+    FinishedJobRegistry,
+    StartedJobRegistry,
+    clean_registries,
+)
+from rq.serializers import JSONSerializer
+from rq.utils import as_text, current_timestamp
 from rq.worker import Worker
-from rq.registry import (CanceledJobRegistry, clean_registries, DeferredJobRegistry,
-                         FailedJobRegistry, FinishedJobRegistry,
-                         StartedJobRegistry)
-
 from tests import RQTestCase
 from tests.fixtures import div_by_zero, say_hello
 
@@ -24,7 +26,6 @@ class CustomJob(Job):
 
 
 class TestRegistry(RQTestCase):
-
     def setUp(self):
         super().setUp()
         self.registry = StartedJobRegistry(connection=self.testconn)
@@ -83,8 +84,7 @@ class TestRegistry(RQTestCase):
 
         # Test that job is added with the right score
         self.registry.add(job, 1000)
-        self.assertLess(self.testconn.zscore(self.registry.key, job.id),
-                        timestamp + 1002)
+        self.assertLess(self.testconn.zscore(self.registry.key, job.id), timestamp + 1002)
 
         # Ensure that a timeout of -1 results in a score of inf
         self.registry.add(job, -1)
@@ -144,8 +144,7 @@ class TestRegistry(RQTestCase):
         self.testconn.zadd(self.registry.key, {'baz': timestamp + 30})
 
         self.assertEqual(self.registry.get_expired_job_ids(), ['foo'])
-        self.assertEqual(self.registry.get_expired_job_ids(timestamp + 20),
-                         ['foo', 'bar'])
+        self.assertEqual(self.registry.get_expired_job_ids(timestamp + 20), ['foo', 'bar'])
 
         # CanceledJobRegistry does not implement get_expired_job_ids()
         registry = CanceledJobRegistry(connection=self.testconn)
@@ -268,12 +267,10 @@ class TestRegistry(RQTestCase):
         self.assertEqual(registry.get_queue(), Queue(connection=self.testconn))
 
         registry = StartedJobRegistry('foo', connection=self.testconn, serializer=JSONSerializer)
-        self.assertEqual(registry.get_queue(),
-                         Queue('foo', connection=self.testconn, serializer=JSONSerializer))
+        self.assertEqual(registry.get_queue(), Queue('foo', connection=self.testconn, serializer=JSONSerializer))
 
 
 class TestFinishedJobRegistry(RQTestCase):
-
     def setUp(self):
         super().setUp()
         self.registry = FinishedJobRegistry(connection=self.testconn)
@@ -321,7 +318,6 @@ class TestFinishedJobRegistry(RQTestCase):
 
 
 class TestDeferredRegistry(RQTestCase):
-
     def setUp(self):
         super().setUp()
         self.registry = DeferredJobRegistry(connection=self.testconn)
@@ -333,8 +329,7 @@ class TestDeferredRegistry(RQTestCase):
         """Adding a job to DeferredJobsRegistry."""
         job = Job()
         self.registry.add(job)
-        job_ids = [as_text(job_id) for job_id in
-                   self.testconn.zrange(self.registry.key, 0, -1)]
+        job_ids = [as_text(job_id) for job_id in self.testconn.zrange(self.registry.key, 0, -1)]
         self.assertEqual(job_ids, [job.id])
 
     def test_register_dependency(self):
@@ -352,7 +347,6 @@ class TestDeferredRegistry(RQTestCase):
 
 
 class TestFailedJobRegistry(RQTestCase):
-
     def test_default_failure_ttl(self):
         """Job TTL defaults to DEFAULT_FAILURE_TTL"""
         queue = Queue(connection=self.testconn)
@@ -511,11 +505,9 @@ class TestFailedJobRegistry(RQTestCase):
         w.handle_job_failure(job, q)
         # job is added to FailedJobRegistry with default failure ttl
         self.assertIn(job.id, registry.get_job_ids())
-        self.assertLess(self.testconn.zscore(registry.key, job.id),
-                        timestamp + DEFAULT_FAILURE_TTL + 5)
+        self.assertLess(self.testconn.zscore(registry.key, job.id), timestamp + DEFAULT_FAILURE_TTL + 5)
 
         # job is added to FailedJobRegistry with specified ttl
         job = q.enqueue(div_by_zero, failure_ttl=5)
         w.handle_job_failure(job, q)
-        self.assertLess(self.testconn.zscore(registry.key, job.id),
-                        timestamp + 7)
+        self.assertLess(self.testconn.zscore(registry.key, job.id), timestamp + 7)
diff --git a/tests/test_results.py b/tests/test_results.py
index 4286cec..e27e872 100644
--- a/tests/test_results.py
+++ b/tests/test_results.py
@@ -1,13 +1,10 @@
-import unittest
 import tempfile
-
+import unittest
 from datetime import timedelta
-from unittest.mock import patch, PropertyMock
+from unittest.mock import PropertyMock, patch
 
 from redis import Redis
 
-from tests import RQTestCase
-
 from rq.defaults import UNSERIALIZABLE_RETURN_VALUE_PAYLOAD
 from rq.job import Job
 from rq.queue import Queue
@@ -15,13 +12,13 @@ from rq.registry import StartedJobRegistry
 from rq.results import Result, get_key
 from rq.utils import get_version, utcnow
 from rq.worker import Worker
+from tests import RQTestCase
 
-from .fixtures import say_hello, div_by_zero
+from .fixtures import div_by_zero, say_hello
 
 
 @unittest.skipIf(get_version(Redis()) < (5, 0, 0), 'Skip if Redis server < 5.0')
 class TestScheduledJobRegistry(RQTestCase):
-
     def test_save_and_get_result(self):
         """Ensure data is saved properly"""
         queue = Queue(connection=self.connection)
@@ -159,8 +156,7 @@ class TestScheduledJobRegistry(RQTestCase):
         registry = StartedJobRegistry(connection=self.connection)
         job.started_at = utcnow()
         job.ended_at = job.started_at + timedelta(seconds=0.75)
-        worker.handle_job_failure(job, exc_string='Error', queue=queue,
-                                  started_job_registry=registry)
+        worker.handle_job_failure(job, exc_string='Error', queue=queue, started_job_registry=registry)
 
         job = Job.fetch(job.id, connection=self.connection)
         payload = self.connection.hgetall(job.key)
@@ -181,8 +177,7 @@ class TestScheduledJobRegistry(RQTestCase):
                 # If `save_result_to_job` = True, result will be saved to job
                 # hash, simulating older versions of RQ
 
-                worker.handle_job_failure(job, exc_string='Error', queue=queue,
-                                          started_job_registry=registry)
+                worker.handle_job_failure(job, exc_string='Error', queue=queue, started_job_registry=registry)
                 payload = self.connection.hgetall(job.key)
                 self.assertTrue(b'exc_info' in payload.keys())
                 # Delete all new result objects so we only have result stored in job hash,
diff --git a/tests/test_retry.py b/tests/test_retry.py
index e8fddeb..ed2d477 100644
--- a/tests/test_retry.py
+++ b/tests/test_retry.py
@@ -9,7 +9,6 @@ from tests.fixtures import div_by_zero, say_hello
 
 
 class TestRetry(RQTestCase):
-
     def test_persistence_of_retry_data(self):
         """Retry related data is stored and restored properly"""
         job = Job.create(func=fixtures.some_calculation)
diff --git a/tests/test_scheduler.py b/tests/test_scheduler.py
index 96cde1c..8aa722a 100644
--- a/tests/test_scheduler.py
+++ b/tests/test_scheduler.py
@@ -1,10 +1,10 @@
 import os
-import redis
-
 from datetime import datetime, timedelta, timezone
 from multiprocessing import Process
 from unittest import mock
 
+import redis
+
 from rq import Queue
 from rq.defaults import DEFAULT_MAINTENANCE_TASK_INTERVAL
 from rq.exceptions import NoSuchJobError
@@ -15,6 +15,7 @@ from rq.serializers import JSONSerializer
 from rq.utils import current_timestamp
 from rq.worker import Worker
 from tests import RQTestCase, find_empty_redis_database, ssl_test
+
 from .fixtures import kill_worker, say_hello
 
 
diff --git a/tests/test_sentry.py b/tests/test_sentry.py
index f52f7db..4ae9722 100644
--- a/tests/test_sentry.py
+++ b/tests/test_sentry.py
@@ -1,15 +1,15 @@
+from unittest import mock
+
+from click.testing import CliRunner
+
 from rq import Queue
 from rq.cli import main
 from rq.cli.helpers import read_config_file
 from rq.contrib.sentry import register_sentry
 from rq.worker import SimpleWorker
-
 from tests import RQTestCase
 from tests.fixtures import div_by_zero
 
-from unittest import mock
-from click.testing import CliRunner
-
 
 class FakeSentry:
     servers = []
diff --git a/tests/test_serializers.py b/tests/test_serializers.py
index 0c50fa7..6ef7ed8 100644
--- a/tests/test_serializers.py
+++ b/tests/test_serializers.py
@@ -18,10 +18,7 @@ class TestSerializers(unittest.TestCase):
         test_data = {'test': 'data'}
         serialized_data = serializer.dumps(test_data)
         self.assertEqual(serializer.loads(serialized_data), test_data)
-        self.assertEqual(
-            next(pickletools.genops(serialized_data))[1],
-            pickle.HIGHEST_PROTOCOL
-        )
+        self.assertEqual(next(pickletools.genops(serialized_data))[1], pickle.HIGHEST_PROTOCOL)
 
         # Test using json serializer
         serializer = resolve_serializer(json)
diff --git a/tests/test_timeouts.py b/tests/test_timeouts.py
index 1f392a3..42cd207 100644
--- a/tests/test_timeouts.py
+++ b/tests/test_timeouts.py
@@ -1,8 +1,8 @@
 import time

 

 from rq import Queue, SimpleWorker

-from rq.timeouts import TimerDeathPenalty

 from rq.registry import FailedJobRegistry, FinishedJobRegistry

+from rq.timeouts import TimerDeathPenalty

 from tests import RQTestCase

 

 

diff --git a/tests/test_utils.py b/tests/test_utils.py
index b71e67e..2dbb613 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -1,10 +1,9 @@
-import re
 import datetime
+import re
 from unittest.mock import Mock
 
 from redis import Redis
 
-from tests import RQTestCase, fixtures
 from rq.exceptions import TimeoutFormatError
 from rq.utils import (
     backend_class,
@@ -16,11 +15,12 @@ from rq.utils import (
     import_attribute,
     is_nonstring_iterable,
     parse_timeout,
-    utcparse,
     split_list,
     truncate_long_string,
+    utcparse,
 )
 from rq.worker import SimpleWorker
+from tests import RQTestCase, fixtures
 
 
 class TestUtils(RQTestCase):
diff --git a/tests/test_worker.py b/tests/test_worker.py
index 5410180..285ae42 100644
--- a/tests/test_worker.py
+++ b/tests/test_worker.py
@@ -1,57 +1,52 @@
 import json
 import os
-import psutil
 import shutil
 import signal
 import subprocess
 import sys
 import time
 import zlib
-
 from datetime import datetime, timedelta
 from multiprocessing import Process
 from time import sleep
+from unittest import mock, skipIf
+from unittest.mock import Mock
 
-from unittest import skipIf
-
-import redis.exceptions
+import psutil
 import pytest
-from unittest import mock
-from unittest.mock import Mock
+import redis.exceptions
 
+from rq import Queue, SimpleWorker, Worker, get_current_connection
 from rq.defaults import DEFAULT_MAINTENANCE_TASK_INTERVAL
+from rq.job import Job, JobStatus, Retry
+from rq.registry import FailedJobRegistry, FinishedJobRegistry, StartedJobRegistry
+from rq.results import Result
+from rq.serializers import JSONSerializer
+from rq.suspension import resume, suspend
+from rq.utils import as_text, utcnow
+from rq.version import VERSION
+from rq.worker import HerokuWorker, RandomWorker, RoundRobinWorker, WorkerStatus
 from tests import RQTestCase, slow
 from tests.fixtures import (
+    CustomJob,
     access_self,
     create_file,
     create_file_after_timeout,
     create_file_after_timeout_and_setsid,
-    CustomJob,
     div_by_zero,
     do_nothing,
     kill_worker,
+    launch_process_within_worker_and_store_pid,
     long_running_job,
     modify_self,
     modify_self_and_error,
+    raise_exc_mock,
     run_dummy_heroku_worker,
     save_key_ttl,
     say_hello,
     say_pid,
-    raise_exc_mock,
-    launch_process_within_worker_and_store_pid,
 )
 
-from rq import Queue, SimpleWorker, Worker, get_current_connection
-from rq.utils import as_text
-from rq.job import Job, JobStatus, Retry
-from rq.registry import StartedJobRegistry, FailedJobRegistry, FinishedJobRegistry
-from rq.results import Result
-from rq.suspension import resume, suspend
-from rq.utils import utcnow
-from rq.version import VERSION
-from rq.worker import HerokuWorker, WorkerStatus, RoundRobinWorker, RandomWorker
-from rq.serializers import JSONSerializer
-
 
 class CustomQueue(Queue):
     pass
@@ -656,7 +651,10 @@ class TestWorker(RQTestCase):
         self.assertIsNone(w.dequeue_job_and_maintain_ttl(None))
 
     def test_worker_ttl_param_resolves_timeout(self):
-        """Ensures the worker_ttl param is being considered in the dequeue_timeout and connection_timeout params, takes into account 15 seconds gap (hard coded)"""
+        """
+        Ensures the worker_ttl param is being considered in the dequeue_timeout and
+        connection_timeout params, takes into account 15 seconds gap (hard coded)
+        """
         q = Queue()
         w = Worker([q])
         self.assertEqual(w.dequeue_timeout, 405)
diff --git a/tests/test_worker_pool.py b/tests/test_worker_pool.py
index ab2e677..219b4a8 100644
--- a/tests/test_worker_pool.py
+++ b/tests/test_worker_pool.py
@@ -1,18 +1,16 @@
 import os
 import signal
-
 from multiprocessing import Process
 from time import sleep
-from rq.job import JobStatus
-
-from tests import TestCase
-from tests.fixtures import CustomJob, _send_shutdown_command, long_running_job, say_hello
 
 from rq.connections import parse_connection
+from rq.job import JobStatus
 from rq.queue import Queue
 from rq.serializers import JSONSerializer
 from rq.worker import SimpleWorker
-from rq.worker_pool import run_worker, WorkerPool
+from rq.worker_pool import WorkerPool, run_worker
+from tests import TestCase
+from tests.fixtures import CustomJob, _send_shutdown_command, long_running_job, say_hello
 
 
 def wait_and_send_shutdown_signal(pid, time_to_wait=0.0):
@@ -111,9 +109,7 @@ class TestWorkerPool(TestCase):
         queue.enqueue(say_hello)
 
         connection_class, pool_class, pool_kwargs = parse_connection(self.connection)
-        run_worker(
-            'test-worker', ['foo'], connection_class, pool_class, pool_kwargs
-        )
+        run_worker('test-worker', ['foo'], connection_class, pool_class, pool_kwargs)
         # Worker should have processed the job
         self.assertEqual(len(queue), 0)
 
diff --git a/tests/test_worker_registration.py b/tests/test_worker_registration.py
index 30a3c82..26ee617 100644
--- a/tests/test_worker_registration.py
+++ b/tests/test_worker_registration.py
@@ -1,15 +1,19 @@
-from rq.utils import ceildiv
-from tests import RQTestCase
 from unittest.mock import patch
 
 from rq import Queue, Worker
-from rq.worker_registration import (clean_worker_registry, get_keys, register,
-                                    unregister, REDIS_WORKER_KEYS,
-                                    WORKERS_BY_QUEUE_KEY)
+from rq.utils import ceildiv
+from rq.worker_registration import (
+    REDIS_WORKER_KEYS,
+    WORKERS_BY_QUEUE_KEY,
+    clean_worker_registry,
+    get_keys,
+    register,
+    unregister,
+)
+from tests import RQTestCase
 
 
 class TestWorkerRegistry(RQTestCase):
-
     def test_worker_registration(self):
         """Ensure worker.key is correctly set in Redis."""
         foo_queue = Queue(name='foo')
@@ -21,23 +25,15 @@ class TestWorkerRegistry(RQTestCase):
 
         self.assertTrue(redis.sismember(worker.redis_workers_keys, worker.key))
         self.assertEqual(Worker.count(connection=redis), 1)
-        self.assertTrue(
-            redis.sismember(WORKERS_BY_QUEUE_KEY % foo_queue.name, worker.key)
-        )
+        self.assertTrue(redis.sismember(WORKERS_BY_QUEUE_KEY % foo_queue.name, worker.key))
         self.assertEqual(Worker.count(queue=foo_queue), 1)
-        self.assertTrue(
-            redis.sismember(WORKERS_BY_QUEUE_KEY % bar_queue.name, worker.key)
-        )
+        self.assertTrue(redis.sismember(WORKERS_BY_QUEUE_KEY % bar_queue.name, worker.key))
         self.assertEqual(Worker.count(queue=bar_queue), 1)
 
         unregister(worker)
         self.assertFalse(redis.sismember(worker.redis_workers_keys, worker.key))
-        self.assertFalse(
-            redis.sismember(WORKERS_BY_QUEUE_KEY % foo_queue.name, worker.key)
-        )
-        self.assertFalse(
-            redis.sismember(WORKERS_BY_QUEUE_KEY % bar_queue.name, worker.key)
-        )
+        self.assertFalse(redis.sismember(WORKERS_BY_QUEUE_KEY % foo_queue.name, worker.key))
+        self.assertFalse(redis.sismember(WORKERS_BY_QUEUE_KEY % bar_queue.name, worker.key))
 
     def test_get_keys_by_queue(self):
         """get_keys_by_queue only returns active workers for that queue"""
@@ -56,17 +52,11 @@ class TestWorkerRegistry(RQTestCase):
         register(worker3)
 
         # get_keys(queue) will return worker keys for that queue
-        self.assertEqual(
-            set([worker1.key, worker2.key]),
-            get_keys(foo_queue)
-        )
+        self.assertEqual(set([worker1.key, worker2.key]), get_keys(foo_queue))
         self.assertEqual(set([worker1.key]), get_keys(bar_queue))
 
         # get_keys(connection=connection) will return all worker keys
-        self.assertEqual(
-            set([worker1.key, worker2.key, worker3.key]),
-            get_keys(connection=worker1.connection)
-        )
+        self.assertEqual(set([worker1.key, worker2.key, worker3.key]), get_keys(connection=worker1.connection))
 
         # Calling get_keys without arguments raises an exception
         self.assertRaises(ValueError, get_keys)
@@ -105,8 +95,9 @@ class TestWorkerRegistry(RQTestCase):
             worker = Worker([queue])
             register(worker)
 
-        with patch('rq.worker_registration.MAX_KEYS', MAX_KEYS), \
-             patch.object(queue.connection, 'pipeline', wraps=queue.connection.pipeline) as pipeline_mock:
+        with patch('rq.worker_registration.MAX_KEYS', MAX_KEYS), patch.object(
+            queue.connection, 'pipeline', wraps=queue.connection.pipeline
+        ) as pipeline_mock:
             # clean_worker_registry creates a pipeline with a context manager. Configure the mock using the context
             # manager entry method __enter__
             pipeline_mock.return_value.__enter__.return_value.srem.return_value = None
diff --git a/tox.ini b/tox.ini
index b2644f3..5adb901 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,8 +1,8 @@
 [tox]
-envlist=py36,py37,py38,py39,py310,flake8
+envlist=lint,py36,py37,py38,py39,py310
 
 [testenv]
-commands=pytest --cov rq --durations=5 {posargs}
+commands=pytest --cov rq --cov-config=.coveragerc --durations=5 {posargs}
 deps=
     pytest
     pytest-cov
@@ -13,13 +13,14 @@ passenv=
     RUN_SSL_TESTS
     RUN_SLOW_TESTS_TOO
 
-[testenv:flake8]
-basepython = python3.6
+[testenv:lint]
+basepython = python3.10
 deps =
-    flake8
+    black
+    ruff
 commands =
-    flake8 rq tests
-
+    black --check rq tests
+    ruff check rq tests
 
 [testenv:py36]
 skipdist = True