diff --git a/pyproject.toml b/pyproject.toml
index 5e87664..b12deb3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ classifiers = [
   "License :: OSI Approved :: MIT License",
   "Programming Language :: Python :: 3",
   "Programming Language :: Python :: 3 :: Only",
-  "Topic :: Software Development :: Refactoring"
+  "Topic :: Software Development :: Quality Assurance"
 ]
 
 [project.scripts]
diff --git a/src/p2pkg/__main__.py b/src/p2pkg/__main__.py
index 2a3fdf0..26ab636 100644
--- a/src/p2pkg/__main__.py
+++ b/src/p2pkg/__main__.py
@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import argparse
-import os
 import pathlib
 import subprocess
 
@@ -85,8 +84,16 @@ def main(argv: list[str] | None = None) -> int:
         prog="p2pkg",
         description="Migrate foo.py -> foo/__main__.py and generate foo/__init__.py that re-exports public API.",
     )
-    parser.add_argument("files", nargs="+", help="Python module files to migrate (e.g. roles_list.py other.py).")
-    parser.add_argument("--no-git", action="store_true", help="Do not use `git mv` even if inside a git repo.")
+    parser.add_argument(
+        "files",
+        nargs="+",
+        help="Python module files to migrate (e.g. roles_list.py other.py).",
+    )
+    parser.add_argument(
+        "--no-git",
+        action="store_true",
+        help="Do not use `git mv` even if inside a git repo.",
+    )
     parser.add_argument(
         "--repo-root",
         default=".",
diff --git a/tests/test_migration.py b/tests/test_migration.py
index fa45556..a3d3fd6 100644
--- a/tests/test_migration.py
+++ b/tests/test_migration.py
@@ -1,7 +1,5 @@
 from __future__ import annotations
 
-import importlib.util
-import os
 import sys
 import tempfile
 import textwrap
@@ -16,7 +14,8 @@ class TestMigration(unittest.TestCase):
         with tempfile.TemporaryDirectory() as td:
             root = Path(td)
             mod = root / "roles_list.py"
-            mod.write_text(textwrap.dedent("""\
+            mod.write_text(
+                textwrap.dedent("""\
             __all__ = ["add", "PUBLIC_CONST"]
             PUBLIC_CONST = 123
             _PRIVATE_CONST = 999
@@ -29,7 +28,8 @@ class TestMigration(unittest.TestCase):
 
             if __name__ == "__main__":
                 print("running as script")
-            """),encoding="utf-8",
+            """),
+                encoding="utf-8",
             )
 
             migrate_one(mod, use_git=False, repo_root=root)
@@ -61,7 +61,8 @@ class TestMigration(unittest.TestCase):
         with tempfile.TemporaryDirectory() as td:
             root = Path(td)
             mod = root / "foo.py"
-            mod.write_text(textwrap.dedent("""\
+            mod.write_text(
+                textwrap.dedent("""\
             VALUE = "ok"
 
             def hello() -> str:
@@ -69,7 +70,9 @@ class TestMigration(unittest.TestCase):
 
             def _private() -> str:
                 return "no"
-            """), encoding="utf-8")
+            """),
+                encoding="utf-8",
+            )
             migrate_one(mod, use_git=False, repo_root=root)
 
             sys.path.insert(0, str(root))