diff --git a/python/database_cli.py b/python/database_cli.py
index e28c19b..f89fc3d 100644
--- a/python/database_cli.py
+++ b/python/database_cli.py
@@ -48,10 +48,7 @@ class DatabaseConfig:
 
     def alembic_config(self) -> Config:
         """Build an alembic Config for this database."""
-        # Runtime import needed — Config is in TYPE_CHECKING for the return type annotation
-        from alembic.config import Config as AlembicConfig  # noqa: PLC0415
-
-        cfg = AlembicConfig()
+        cfg = Config()
         cfg.set_main_option("script_location", self.script_location)
         cfg.set_main_option("file_template", self.file_template)
         cfg.set_main_option("prepend_sys_path", ".")
diff --git a/python/installer/__main__.py b/python/installer/__main__.py
index 96c4937..2dc5c92 100644
--- a/python/installer/__main__.py
+++ b/python/installer/__main__.py
@@ -262,6 +262,7 @@ def installer(
             ):
                 run(command, check=True, stdin=test.stdout)
 
+    # Fixed mount point for the new system; the installer runs as root on a fresh disk
     mnt_dir = "/tmp/nix_install"  # noqa: S108
 
     Path(mnt_dir).mkdir(parents=True, exist_ok=True)
diff --git a/python/installer/old_installer.py b/python/installer/old_installer.py
index 38be8ec..8dd9214 100644
--- a/python/installer/old_installer.py
+++ b/python/installer/old_installer.py
@@ -297,6 +297,7 @@ def installer(
                 check=True,
             )
 
+    # Fixed mount point for the new system; the installer runs as root on a fresh disk
     mnt_dir = "/tmp/nix_install"  # noqa: S108
 
     Path(mnt_dir).mkdir(parents=True, exist_ok=True)
diff --git a/python/tools/audiobook/audible_convert.py b/python/tools/audiobook/audible_convert.py
index 4957b04..fb64be6 100644
--- a/python/tools/audiobook/audible_convert.py
+++ b/python/tools/audiobook/audible_convert.py
@@ -451,7 +451,7 @@ def convert_aax_file_with_agent(aax_file: Path, config: ConversionConfig) -> Non
     destination.parent.mkdir(parents=True, exist_ok=True)
     try:
         temp_file.replace(destination)
-    except Exception as error:  # noqa: BLE001
+    except OSError as error:
         write_review_file(
             destination=destination,
             ffprobe_metadata=ffprobe_metadata,
diff --git a/tests/test_audible_convert.py b/tests/test_audible_convert.py
index 28e9c5f..d3b9fae 100644
--- a/tests/test_audible_convert.py
+++ b/tests/test_audible_convert.py
@@ -1021,8 +1021,6 @@ def test_existing_destination_skips_rename_and_removes_temp(tmp_path, monkeypatc
 
 
 def test_richie_exports_audiobook_models() -> None:
-    from python.orm.richie import Audiobook  # noqa: PLC0415
-
     assert Audiobook.__tablename__ == "audiobook"
 
 
diff --git a/tests/test_parallelize.py b/tests/test_parallelize.py
index 8627164..8225c55 100644
--- a/tests/test_parallelize.py
+++ b/tests/test_parallelize.py
@@ -19,7 +19,7 @@ if TYPE_CHECKING:
 class MockFuture(Future):
     """MockFuture."""
 
-    def __init__(self, result: Any) -> None:  # noqa: ANN401
+    def __init__(self, result: Any) -> None:
         """Init."""
         super().__init__()
         self._result = result
@@ -31,7 +31,7 @@ class MockFuture(Future):
         logging.debug(f"{timeout}=")
         return self._exception
 
-    def result(self, timeout: float | None = None) -> Any:  # noqa: ANN401
+    def result(self, timeout: float | None = None) -> Any:
         """Result."""
         logging.debug(f"{timeout}=")
         return self._result
@@ -40,11 +40,11 @@ class MockFuture(Future):
 class MockPoolExecutor(ThreadPoolExecutor):
     """MockPoolExecutor."""
 
-    def __init__(self, *args: Any, **kwargs: Any) -> None:  # noqa: ANN401
+    def __init__(self, *args: Any, **kwargs: Any) -> None:
         """Initializes a new ThreadPoolExecutor instance."""
         super().__init__(*args, **kwargs)
 
-    def submit(self, fn: Callable[..., Any], /, *args: Any, **kwargs: Any) -> Future:  # noqa: ANN401
+    def submit(self, fn: Callable[..., Any], /, *args: Any, **kwargs: Any) -> Future:
         """Submits a callable to be executed with the given arguments.
 
         Args: