diff --git a/async_subprocess.py b/async_subprocess.py
index b55584b..fe393ea 100644
--- a/async_subprocess.py
+++ b/async_subprocess.py
@@ -1,4 +1,5 @@
 """asyncio subprocess create_subprocess_exec"""
+
 import asyncio
 import subprocess
 
diff --git a/async_subprocess_test.py b/async_subprocess_test.py
index 3119110..a2fe1a4 100644
--- a/async_subprocess_test.py
+++ b/async_subprocess_test.py
@@ -1,4 +1,5 @@
 """Tests for async_subprocess_test"""
+
 import subprocess
 
 import pytest
diff --git a/bot_local_test.py b/bot_local_test.py
index d3cc54b..d0c0900 100644
--- a/bot_local_test.py
+++ b/bot_local_test.py
@@ -1,4 +1,5 @@
 """Make sure bot_local works"""
+
 import pytest
 
 from bot_local import async_main
diff --git a/bot_test.py b/bot_test.py
index f439d2b..ad4215a 100644
--- a/bot_test.py
+++ b/bot_test.py
@@ -1,4 +1,5 @@
 """Tests for Doof"""
+
 import asyncio
 from datetime import timedelta
 
@@ -1045,13 +1046,15 @@ async def test_wait_for_checkboxes(
     get_release_pr_mock = mocker.async_patch("bot.get_release_pr", return_value=pr)
     get_unchecked_patch = mocker.async_patch(
         "bot.get_unchecked_authors",
-        side_effect=[
-            {"author1", "author2", "author3"},
-            {"author2"},
-            set(),
-        ]
-        if has_checkboxes
-        else [set()],
+        side_effect=(
+            [
+                {"author1", "author2", "author3"},
+                {"author2"},
+                set(),
+            ]
+            if has_checkboxes
+            else [set()]
+        ),
     )
     doof.slack_users = [
         {"profile": {"real_name": name}, "id": username}
@@ -1403,15 +1406,17 @@ async def test_start_new_releases(
     )
     get_release_pr_mock = mocker.async_patch(
         "bot.get_release_pr",
-        return_value=ReleasePR(
-            version=old_version,
-            url="https://example.com",
-            body="...",
-            number=123,
-            open=False,
-        )
-        if has_release_pr
-        else None,
+        return_value=(
+            ReleasePR(
+                version=old_version,
+                url="https://example.com",
+                body="...",
+                number=123,
+                open=False,
+            )
+            if has_release_pr
+            else None
+        ),
     )
     release_notes = f"Release notes for {test_repo.repo_url}"
     get_project_version_mock = mocker.async_patch(
diff --git a/client_wrapper.py b/client_wrapper.py
index 34a6180..b4c2152 100644
--- a/client_wrapper.py
+++ b/client_wrapper.py
@@ -1,4 +1,5 @@
 """Wrapper for HTTP client. Replaces httpx until it matures."""
+
 import requests
 from requests.adapters import HTTPAdapter
 from urllib3.util import Retry
diff --git a/conftest.py b/conftest.py
index c60982b..cee81bc 100644
--- a/conftest.py
+++ b/conftest.py
@@ -1,4 +1,5 @@
 """Fixtures for tests"""
+
 import os
 
 import pytest
diff --git a/constants.py b/constants.py
index 4c45a50..453ff1a 100644
--- a/constants.py
+++ b/constants.py
@@ -1,4 +1,5 @@
 """Constants"""
+
 import os
 
 
diff --git a/exception.py b/exception.py
index 3562785..08c6962 100644
--- a/exception.py
+++ b/exception.py
@@ -1,4 +1,5 @@
 """Exceptions for release script"""
+
 from subprocess import CalledProcessError
 
 
diff --git a/finish_release.py b/finish_release.py
index 24a4015..c5b1b42 100644
--- a/finish_release.py
+++ b/finish_release.py
@@ -1,4 +1,5 @@
 """Release script to finish the release"""
+
 import os
 import re
 from datetime import datetime
diff --git a/finish_release_test.py b/finish_release_test.py
index 0142231..7784ade 100644
--- a/finish_release_test.py
+++ b/finish_release_test.py
@@ -1,4 +1,5 @@
 """Tests for finish_release.py"""
+
 from datetime import datetime
 import re
 import os
diff --git a/github_test.py b/github_test.py
index b938f5c..a5a32aa 100644
--- a/github_test.py
+++ b/github_test.py
@@ -1,4 +1,5 @@
 """Tests for github functions"""
+
 import json
 import os
 from urllib.parse import quote
diff --git a/lib.py b/lib.py
index 111146d..e3d335d 100644
--- a/lib.py
+++ b/lib.py
@@ -1,4 +1,5 @@
 """Shared functions for release script Python files"""
+
 from collections import namedtuple
 from contextlib import asynccontextmanager
 from datetime import datetime, timezone
diff --git a/lib_test.py b/lib_test.py
index 6cdf1fb..a82c273 100644
--- a/lib_test.py
+++ b/lib_test.py
@@ -1,4 +1,5 @@
 """Tests for lib"""
+
 from requests import Response, HTTPError
 import pytest
 
diff --git a/publish.py b/publish.py
index aee86f4..132a4cf 100644
--- a/publish.py
+++ b/publish.py
@@ -1,4 +1,5 @@
 """Functions for publishing"""
+
 import os
 from pathlib import Path
 
diff --git a/publish_test.py b/publish_test.py
index 8ce0d51..ed45ea9 100644
--- a/publish_test.py
+++ b/publish_test.py
@@ -1,6 +1,7 @@
 """
 Test package uploading functions
 """
+
 import os
 from pathlib import Path
 import subprocess
diff --git a/release_test.py b/release_test.py
index fdb78e7..f77b8f0 100644
--- a/release_test.py
+++ b/release_test.py
@@ -1,4 +1,5 @@
 """Tests for release script"""
+
 import os
 from subprocess import CalledProcessError
 
diff --git a/repo_info.py b/repo_info.py
index ae8c078..0662718 100644
--- a/repo_info.py
+++ b/repo_info.py
@@ -1,4 +1,5 @@
 """Information about repositories"""
+
 from collections import namedtuple
 
 RepoInfo = namedtuple(
diff --git a/slack.py b/slack.py
index 948afd8..72a28f7 100644
--- a/slack.py
+++ b/slack.py
@@ -1,4 +1,5 @@
 """functions for interacting with slack"""
+
 from client_wrapper import ClientWrapper
 
 
diff --git a/slack_test.py b/slack_test.py
index 9629053..8de2f02 100644
--- a/slack_test.py
+++ b/slack_test.py
@@ -1,4 +1,5 @@
 """Tests for slack functions"""
+
 import pytest
 
 
diff --git a/status.py b/status.py
index 174e38a..5512639 100644
--- a/status.py
+++ b/status.py
@@ -1,4 +1,5 @@
 """Get release status of a repository"""
+
 from constants import (
     BLOCKER_LABELS,
     DEPLOYED_TO_PROD,
@@ -89,9 +90,11 @@ async def status_for_repo_new_commits(*, github_access_token, repo_info, release
         )
         default_branch = await get_default_branch(working_dir)
         return await any_commits_between_branches(
-            branch1="origin/release-candidate"
-            if release_pr and release_pr.open
-            else f"v{last_version}",
+            branch1=(
+                "origin/release-candidate"
+                if release_pr and release_pr.open
+                else f"v{last_version}"
+            ),
             branch2=default_branch,
             root=working_dir,
         )
diff --git a/status_test.py b/status_test.py
index 535389f..43c7dec 100644
--- a/status_test.py
+++ b/status_test.py
@@ -1,4 +1,5 @@
 """Tests for statuses"""
+
 import pytest
 
 
@@ -159,9 +160,11 @@ async def test_status_for_repo_new_commits(  # pylint: disable=too-many-argument
     )
     get_default_branch_mock.assert_called_once_with(test_repo_directory)
     any_commits_mock.assert_called_once_with(
-        branch1="origin/release-candidate"
-        if has_release_pr and is_open
-        else f"v{get_project_version_mock.return_value}",
+        branch1=(
+            "origin/release-candidate"
+            if has_release_pr and is_open
+            else f"v{get_project_version_mock.return_value}"
+        ),
         branch2=get_default_branch_mock.return_value,
         root=test_repo_directory,
     )
diff --git a/test_constants.py b/test_constants.py
index 2510706..f2c481c 100644
--- a/test_constants.py
+++ b/test_constants.py
@@ -1,6 +1,5 @@
 """Constants used in unit test"""
 
-
 FAKE_RELEASE_PR_BODY = """
 
 ## Alice Pote
diff --git a/test_requirements.txt b/test_requirements.txt
index ba54d7c..1807841 100644
--- a/test_requirements.txt
+++ b/test_requirements.txt
@@ -1,4 +1,4 @@
-black==22.3.0
+black==25.1.0
 codecov
 pdbpp
 pylint
diff --git a/test_util.py b/test_util.py
index dd65f4a..1c813de 100644
--- a/test_util.py
+++ b/test_util.py
@@ -1,4 +1,5 @@
 """Utility functions for testing"""
+
 from contextlib import asynccontextmanager, contextmanager
 import gzip
 import os
diff --git a/version.py b/version.py
index d093a51..0a4a8ff 100644
--- a/version.py
+++ b/version.py
@@ -1,6 +1,7 @@
 """
 General versioning functions
 """
+
 import json
 import os
 from pathlib import Path
diff --git a/version_test.py b/version_test.py
index 8436db9..ca0e003 100644
--- a/version_test.py
+++ b/version_test.py
@@ -1,4 +1,5 @@
 """Test version functions"""
+
 import json
 import os
 from pathlib import Path
diff --git a/wait_for_deploy.py b/wait_for_deploy.py
index ba9d632..e87d29f 100644
--- a/wait_for_deploy.py
+++ b/wait_for_deploy.py
@@ -1,4 +1,5 @@
 """Wait for hash on server to match with deployed code"""
+
 import asyncio
 import time
 
diff --git a/wait_for_deploy_test.py b/wait_for_deploy_test.py
index fd5cd79..b90c608 100644
--- a/wait_for_deploy_test.py
+++ b/wait_for_deploy_test.py
@@ -1,4 +1,5 @@
 """Tests for wait_for_deploy"""
+
 import pytest
 
 from test_util import async_context_manager_yielder
diff --git a/web.py b/web.py
index 90bafe3..44fcf91 100644
--- a/web.py
+++ b/web.py
@@ -1,6 +1,7 @@
 """
 Web server for handling slack webhooks
 """
+
 import hmac
 import json
 
diff --git a/web_test.py b/web_test.py
index 5f0e031..e425184 100644
--- a/web_test.py
+++ b/web_test.py
@@ -1,4 +1,5 @@
 """Tests for the web server"""
+
 import asyncio
 import json
 from unittest.mock import patch