diff --git a/importlib_metadata/__init__.py b/importlib_metadata/__init__.py
index 09a02a4e..1e5be7a2 100644
--- a/importlib_metadata/__init__.py
+++ b/importlib_metadata/__init__.py
@@ -769,6 +769,7 @@ class Lookup:
     """
     A micro-optimized class for searching a (fast) path for metadata.
     """
+
     def __init__(self, path: FastPath):
         """
         Calculate all of the children representing metadata.
diff --git a/importlib_metadata/_meta.py b/importlib_metadata/_meta.py
index 1342d839..1927d0f6 100644
--- a/importlib_metadata/_meta.py
+++ b/importlib_metadata/_meta.py
@@ -9,30 +9,27 @@
 
 
 class PackageMetadata(Protocol):
-    def __len__(self) -> int:
-        ...  # pragma: no cover
+    def __len__(self) -> int: ...  # pragma: no cover
 
-    def __contains__(self, item: str) -> bool:
-        ...  # pragma: no cover
+    def __contains__(self, item: str) -> bool: ...  # pragma: no cover
 
-    def __getitem__(self, key: str) -> str:
-        ...  # pragma: no cover
+    def __getitem__(self, key: str) -> str: ...  # pragma: no cover
 
-    def __iter__(self) -> Iterator[str]:
-        ...  # pragma: no cover
+    def __iter__(self) -> Iterator[str]: ...  # pragma: no cover
 
     @overload
-    def get(self, name: str, failobj: None = None) -> Optional[str]:
-        ...  # pragma: no cover
+    def get(
+        self, name: str, failobj: None = None
+    ) -> Optional[str]: ...  # pragma: no cover
 
     @overload
-    def get(self, name: str, failobj: _T) -> Union[str, _T]:
-        ...  # pragma: no cover
+    def get(self, name: str, failobj: _T) -> Union[str, _T]: ...  # pragma: no cover
 
     # overload per python/importlib_metadata#435
     @overload
-    def get_all(self, name: str, failobj: None = None) -> Optional[List[Any]]:
-        ...  # pragma: no cover
+    def get_all(
+        self, name: str, failobj: None = None
+    ) -> Optional[List[Any]]: ...  # pragma: no cover
 
     @overload
     def get_all(self, name: str, failobj: _T) -> Union[List[Any], _T]:
@@ -52,21 +49,19 @@ class SimplePath(Protocol):
     A minimal subset of pathlib.Path required by Distribution.
     """
 
-    def joinpath(self, other: Union[str, os.PathLike[str]]) -> SimplePath:
-        ...  # pragma: no cover
+    def joinpath(
+        self, other: Union[str, os.PathLike[str]]
+    ) -> SimplePath: ...  # pragma: no cover
 
-    def __truediv__(self, other: Union[str, os.PathLike[str]]) -> SimplePath:
-        ...  # pragma: no cover
+    def __truediv__(
+        self, other: Union[str, os.PathLike[str]]
+    ) -> SimplePath: ...  # pragma: no cover
 
     @property
-    def parent(self) -> SimplePath:
-        ...  # pragma: no cover
+    def parent(self) -> SimplePath: ...  # pragma: no cover
 
-    def read_text(self, encoding=None) -> str:
-        ...  # pragma: no cover
+    def read_text(self, encoding=None) -> str: ...  # pragma: no cover
 
-    def read_bytes(self) -> bytes:
-        ...  # pragma: no cover
+    def read_bytes(self) -> bytes: ...  # pragma: no cover
 
-    def exists(self) -> bool:
-        ...  # pragma: no cover
+    def exists(self) -> bool: ...  # pragma: no cover
diff --git a/importlib_metadata/_py39compat.py b/importlib_metadata/_py39compat.py
index cde4558f..fc6b8221 100644
--- a/importlib_metadata/_py39compat.py
+++ b/importlib_metadata/_py39compat.py
@@ -1,6 +1,7 @@
 """
 Compatibility layer with Python 3.8/3.9
 """
+
 from typing import TYPE_CHECKING, Any, Optional
 
 if TYPE_CHECKING:  # pragma: no cover
diff --git a/tests/_path.py b/tests/_path.py
index 25c799fa..b3cfb9cd 100644
--- a/tests/_path.py
+++ b/tests/_path.py
@@ -17,20 +17,15 @@ class Symlink(str):
 
 @runtime_checkable
 class TreeMaker(Protocol):
-    def __truediv__(self, *args, **kwargs):
-        ...  # pragma: no cover
+    def __truediv__(self, *args, **kwargs): ...  # pragma: no cover
 
-    def mkdir(self, **kwargs):
-        ...  # pragma: no cover
+    def mkdir(self, **kwargs): ...  # pragma: no cover
 
-    def write_text(self, content, **kwargs):
-        ...  # pragma: no cover
+    def write_text(self, content, **kwargs): ...  # pragma: no cover
 
-    def write_bytes(self, content):
-        ...  # pragma: no cover
+    def write_bytes(self, content): ...  # pragma: no cover
 
-    def symlink_to(self, target):
-        ...  # pragma: no cover
+    def symlink_to(self, target): ...  # pragma: no cover
 
 
 def _ensure_tree_maker(obj: Union[str, TreeMaker]) -> TreeMaker:
diff --git a/tests/fixtures.py b/tests/fixtures.py
index b419d81c..7daae16a 100644
--- a/tests/fixtures.py
+++ b/tests/fixtures.py
@@ -140,15 +140,13 @@ class DistInfoPkgEditable(DistInfoPkg):
     some_hash = '524127ce937f7cb65665130c695abd18ca386f60bb29687efb976faa1596fdcc'
     files: FilesSpec = {
         'distinfo_pkg-1.0.0.dist-info': {
-            'direct_url.json': json.dumps(
-                {
-                    "archive_info": {
-                        "hash": f"sha256={some_hash}",
-                        "hashes": {"sha256": f"{some_hash}"},
-                    },
-                    "url": "file:///path/to/distinfo_pkg-1.0.0.editable-py3-none-any.whl",
-                }
-            )
+            'direct_url.json': json.dumps({
+                "archive_info": {
+                    "hash": f"sha256={some_hash}",
+                    "hashes": {"sha256": f"{some_hash}"},
+                },
+                "url": "file:///path/to/distinfo_pkg-1.0.0.editable-py3-none-any.whl",
+            })
         },
     }
 
diff --git a/tests/test_main.py b/tests/test_main.py
index dd6b51fa..6e0b1da7 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -304,12 +304,10 @@ def test_sortable(self):
         """
         EntryPoint objects are sortable, but result is undefined.
         """
-        sorted(
-            [
-                EntryPoint(name='b', value='val', group='group'),
-                EntryPoint(name='a', value='val', group='group'),
-            ]
-        )
+        sorted([
+            EntryPoint(name='b', value='val', group='group'),
+            EntryPoint(name='a', value='val', group='group'),
+        ])
 
 
 class FileSystem(
@@ -376,18 +374,16 @@ def test_packages_distributions_all_module_types(self):
             'all_distributions-1.0.0.dist-info': metadata,
         }
         for i, suffix in enumerate(suffixes):
-            files.update(
-                {
-                    f'importable-name {i}{suffix}': '',
-                    f'in_namespace_{i}': {
-                        f'mod{suffix}': '',
-                    },
-                    f'in_package_{i}': {
-                        '__init__.py': '',
-                        f'mod{suffix}': '',
-                    },
-                }
-            )
+            files.update({
+                f'importable-name {i}{suffix}': '',
+                f'in_namespace_{i}': {
+                    f'mod{suffix}': '',
+                },
+                f'in_package_{i}': {
+                    '__init__.py': '',
+                    f'mod{suffix}': '',
+                },
+            })
         metadata.update(RECORD=fixtures.build_record(files))
         fixtures.build_files(files, prefix=self.site_dir)