diff --git a/alphaconf/inject.py b/alphaconf/inject.py
index 7c8e93d..26de30d 100644
--- a/alphaconf/inject.py
+++ b/alphaconf/inject.py
@@ -52,8 +52,8 @@ def getter(
         ktype = next(type_from_annotation(ptype), None)
     if param is not None and param.default is not param.empty:
         xparam = param
-        return (
-            lambda: xparam.default
+        return lambda: (
+            xparam.default
             if (value := alphaconf.get(key, ktype, default=None)) is None
             and xparam.default is not xparam.empty
             else value
diff --git a/alphaconf/internal/arg_parser.py b/alphaconf/internal/arg_parser.py
index d993995..3fe0554 100644
--- a/alphaconf/internal/arg_parser.py
+++ b/alphaconf/internal/arg_parser.py
@@ -91,7 +91,7 @@ class ConfigurationAction(Action):
 
     def check_argument(self, value):
         if self.metavar and '=' in self.metavar and '=' not in value:
-            return 'Argument should be in format %s' % self.metavar
+            return f'Argument should be in format {self.metavar}'
         return super().check_argument(value)
 
     def handle(self, result, value):
diff --git a/alphaconf/internal/configuration.py b/alphaconf/internal/configuration.py
index dbe4b7a..3133f96 100644
--- a/alphaconf/internal/configuration.py
+++ b/alphaconf/internal/configuration.py
@@ -55,8 +55,7 @@ def get(
         type: Type[T],
         *,
         default: Union[T, RaiseOnMissingType] = raise_on_missing,
-    ) -> T:
-        ...
+    ) -> T: ...
 
     @overload
     def get(
@@ -65,8 +64,7 @@ def get(
         type: Union[str, None] = None,
         *,
         default: Any = raise_on_missing,
-    ) -> Any:
-        ...
+    ) -> Any: ...
 
     @overload
     def get(
@@ -75,8 +73,7 @@ def get(
         type: None = None,
         *,
         default: Union[T, RaiseOnMissingType] = raise_on_missing,
-    ) -> T:
-        ...
+    ) -> T: ...
 
     def get(self, key: Union[str, Type], type=None, *, default=raise_on_missing):
         """Get a configuation value and cast to the correct type"""
diff --git a/pyproject.toml b/pyproject.toml
index 5bf437d..5459576 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,6 +54,8 @@ local_scheme = "no-local-version"
 
 [tool.ruff]
 line-length = 100
+
+[tool.ruff.lint]
 # https://beta.ruff.rs/docs/rules/
 select = [
     #"C9",  # mccabe
@@ -77,5 +79,5 @@ ignore = [
     "SIM108",  # simplify ITE by operator
 ]
 
-[tool.ruff.mccabe]
+[tool.ruff.lint.mccabe]
 max-complexity = 10
diff --git a/tests/test_logging.py b/tests/test_logging.py
index ddddf8b..9538031 100644
--- a/tests/test_logging.py
+++ b/tests/test_logging.py
@@ -40,7 +40,7 @@ def test_log_exception(log, caplog):
         log.error('err', exc_info=True)
     rec = caplog.records[0]
     exc_type, exc, tb = rec.exc_info
-    assert exc_type == ValueError and str(exc) == 'tvalue' and tb
+    assert exc_type is ValueError and str(exc) == 'tvalue' and tb
 
 
 def test_log_format(log, caplog):