diff --git a/nbformat/_struct.py b/nbformat/_struct.py
index 23aa45f..dfb106f 100644
--- a/nbformat/_struct.py
+++ b/nbformat/_struct.py
@@ -2,6 +2,7 @@
 
 Can probably be replaced by types.SimpleNamespace from Python 3.3
 """
+
 from __future__ import annotations
 
 from typing import Any, Dict
diff --git a/nbformat/_version.py b/nbformat/_version.py
index 447bf88..a0b02e4 100644
--- a/nbformat/_version.py
+++ b/nbformat/_version.py
@@ -1,4 +1,5 @@
 """The version information for nbformat."""
+
 # Use "hatchling version xx.yy.zz" to handle version changes
 from __future__ import annotations
 
diff --git a/nbformat/corpus/words.py b/nbformat/corpus/words.py
index 24d7889..043bbbe 100644
--- a/nbformat/corpus/words.py
+++ b/nbformat/corpus/words.py
@@ -1,4 +1,5 @@
 """Generate a corpus id."""
+
 from __future__ import annotations
 
 import uuid
diff --git a/nbformat/json_compat.py b/nbformat/json_compat.py
index 8385609..3921931 100644
--- a/nbformat/json_compat.py
+++ b/nbformat/json_compat.py
@@ -2,6 +2,7 @@
 Common validator wrapper to provide a uniform usage of other schema validation
 libraries.
 """
+
 # Copyright (c) Jupyter Development Team.
 # Distributed under the terms of the Modified BSD License.
 from __future__ import annotations
diff --git a/nbformat/notebooknode.py b/nbformat/notebooknode.py
index 8b3d11a..02f1532 100644
--- a/nbformat/notebooknode.py
+++ b/nbformat/notebooknode.py
@@ -1,4 +1,5 @@
 """NotebookNode - adding attribute access to dicts"""
+
 from __future__ import annotations
 
 from collections.abc import Mapping
diff --git a/nbformat/v2/nbxml.py b/nbformat/v2/nbxml.py
index 44e00c6..540cbe1 100644
--- a/nbformat/v2/nbxml.py
+++ b/nbformat/v2/nbxml.py
@@ -1,5 +1,5 @@
-"""REMOVED: Read and write notebook files as XML.
-"""
+"""REMOVED: Read and write notebook files as XML."""
+
 from __future__ import annotations
 
 REMOVED_MSG = """\
diff --git a/nbformat/v3/__init__.py b/nbformat/v3/__init__.py
index a87f9bd..0f0c96a 100644
--- a/nbformat/v3/__init__.py
+++ b/nbformat/v3/__init__.py
@@ -1,5 +1,4 @@
-"""The main API for the v3 notebook format.
-"""
+"""The main API for the v3 notebook format."""
 
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
diff --git a/nbformat/validator.py b/nbformat/validator.py
index 30ea71a..3344dbe 100644
--- a/nbformat/validator.py
+++ b/nbformat/validator.py
@@ -1,4 +1,5 @@
 """Notebook format validators."""
+
 # Copyright (c) IPython Development Team.
 # Distributed under the terms of the Modified BSD License.
 from __future__ import annotations
diff --git a/nbformat/warnings.py b/nbformat/warnings.py
index 4c8d5bf..0b5db21 100644
--- a/nbformat/warnings.py
+++ b/nbformat/warnings.py
@@ -1,6 +1,7 @@
 """
 Warnings that can be emitted by nbformat.
 """
+
 from __future__ import annotations
 
 
diff --git a/package.json b/package.json
index c11411a..e81603b 100644
--- a/package.json
+++ b/package.json
@@ -1,25 +1,25 @@
 {
-    "name": "nbformat-schema",
-    "version": "5.10.3",
-    "description": "JSON schemata for Jupyter notebook formats",
-    "main": "index.js",
-    "files": [
-        "nbformat/v3/nbformat.v3.schema.json",
-        "nbformat/v4/nbformat.v4.schema.json"
-    ],
-    "repository": {
-        "type": "git",
-        "url": "git+https://github.com/jupyter/nbformat.git"
-    },
-    "keywords": [
-        "jupyter",
-        "notebook",
-        "json-schema"
-    ],
-    "author": "Project Jupyter Contributors",
-    "license": "BSD-3-Clause",
-    "bugs": {
-        "url": "https://github.com/jupyter/nbformat/issues"
-    },
-    "homepage": "https://nbformat.readthedocs.io"
+  "name": "nbformat-schema",
+  "version": "5.10.3",
+  "description": "JSON schemata for Jupyter notebook formats",
+  "main": "index.js",
+  "files": [
+    "nbformat/v3/nbformat.v3.schema.json",
+    "nbformat/v4/nbformat.v4.schema.json"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jupyter/nbformat.git"
+  },
+  "keywords": [
+    "jupyter",
+    "notebook",
+    "json-schema"
+  ],
+  "author": "Project Jupyter Contributors",
+  "license": "BSD-3-Clause",
+  "bugs": {
+    "url": "https://github.com/jupyter/nbformat/issues"
+  },
+  "homepage": "https://nbformat.readthedocs.io"
 }
diff --git a/tests/v4/test_json.py b/tests/v4/test_json.py
index a16586a..76d89aa 100644
--- a/tests/v4/test_json.py
+++ b/tests/v4/test_json.py
@@ -130,6 +130,6 @@ def test_latest_matches_nbformat(self):
             os.path.join(BASE_PATH, "nbformat.v4.schema.json"), encoding="utf-8"
         ) as schema_file:
             schema = json.load(schema_file)
-        assert schema["description"] == "Jupyter Notebook v{major}.{minor} JSON schema.".format(
-            major=nbformat, minor=nbformat_minor
+        assert (
+            schema["description"] == f"Jupyter Notebook v{nbformat}.{nbformat_minor} JSON schema."
         )
diff --git a/tests/v4/test_nbbase.py b/tests/v4/test_nbbase.py
index be9d9d1..df21df8 100644
--- a/tests/v4/test_nbbase.py
+++ b/tests/v4/test_nbbase.py
@@ -1,4 +1,5 @@
 """Tests for the Python API for composing notebook elements"""
+
 from __future__ import annotations
 
 from nbformat.v4.nbbase import (