diff --git a/saqc/core/core.py b/saqc/core/core.py
index 1a1976fea27b6e9a4e503bf84ccd79b1a4b7a68e..916bcf3e48bcb984fe6cba28b5270297130bef33 100644
--- a/saqc/core/core.py
+++ b/saqc/core/core.py
@@ -54,16 +54,20 @@ class SaQC(FunctionsMixin):
 
     def __init__(
         self,
-        data: pd.Series
-        | pd.DataFrame
-        | DictOfSeries
-        | list[pd.Series | pd.DataFrame | DictOfSeries]
-        | None = None,
-        flags: pd.DataFrame
-        | DictOfSeries
-        | Flags
-        | list[pd.DataFrame | DictOfSeries | Flags]
-        | None = None,
+        data: (
+            pd.Series
+            | pd.DataFrame
+            | DictOfSeries
+            | list[pd.Series | pd.DataFrame | DictOfSeries]
+            | None
+        ) = None,
+        flags: (
+            pd.DataFrame
+            | DictOfSeries
+            | Flags
+            | list[pd.DataFrame | DictOfSeries | Flags]
+            | None
+        ) = None,
         scheme: str | TranslationScheme = "float",
     ):
         self.scheme: TranslationScheme = scheme
@@ -193,12 +197,14 @@ class SaQC(FunctionsMixin):
     def __setitem__(
         self,
         key: str | slice | Iterable[str],
-        value: SaQC
-        | pd.Series
-        | pd.DataFrame
-        | DictOfSeries
-        | dict[Any, pd.Series]
-        | Iterable[pd.Series],
+        value: (
+            SaQC
+            | pd.Series
+            | pd.DataFrame
+            | DictOfSeries
+            | dict[Any, pd.Series]
+            | Iterable[pd.Series]
+        ),
     ):
         keys = self._get_keys(key)
         if isinstance(value, SaQC):
diff --git a/saqc/core/flags.py b/saqc/core/flags.py
index 4f1d83df7fa210b7c2597174dbe5d20dda30438c..c90d05b6e2d58c66871dab2389c0d61b2a472162 100644
--- a/saqc/core/flags.py
+++ b/saqc/core/flags.py
@@ -323,12 +323,10 @@ class Flags:
     # item access
 
     @overload
-    def __getitem__(self, key: str) -> pd.Series:
-        ...
+    def __getitem__(self, key: str) -> pd.Series: ...
 
     @overload
-    def __getitem__(self, key: list | pd.Index) -> Flags:
-        ...
+    def __getitem__(self, key: list | pd.Index) -> Flags: ...
 
     def __getitem__(self, key: str | list | pd.Index) -> pd.Series | Flags:
         if isinstance(key, str):
diff --git a/saqc/core/translation/basescheme.py b/saqc/core/translation/basescheme.py
index 92aceb333017222b9700c56a65db36d0695d8e31..c072907c8ddb477ccd8e112d23822d4414212192 100644
--- a/saqc/core/translation/basescheme.py
+++ b/saqc/core/translation/basescheme.py
@@ -217,7 +217,6 @@ class MappingScheme(TranslationScheme):
 
 
 class FloatScheme(TranslationScheme):
-
     """
     Acts as the default Translator, provides a changeable subset of the
     internal float flags
diff --git a/saqc/core/translation/dmpscheme.py b/saqc/core/translation/dmpscheme.py
index c7708e42d56f81b4b83cc845d26b1ab062f851d8..6ecd324d017847fb13cc6add3d2c41a7264d7849 100644
--- a/saqc/core/translation/dmpscheme.py
+++ b/saqc/core/translation/dmpscheme.py
@@ -41,7 +41,6 @@ _QUALITY_LABELS = [
 
 
 class DmpScheme(MappingScheme):
-
     """
     Implements the translation from and to the flagging scheme implemented in
     the UFZ - Datamanagementportal
diff --git a/saqc/core/translation/positionalscheme.py b/saqc/core/translation/positionalscheme.py
index fffc988341204fd21d2136d7db5f3a1990de0bf2..6e4bbe4833663d14dd3b50927d0ed2ab6c00d821 100644
--- a/saqc/core/translation/positionalscheme.py
+++ b/saqc/core/translation/positionalscheme.py
@@ -16,7 +16,6 @@ from saqc.core.translation.basescheme import BackwardMap, ForwardMap, MappingSch
 
 
 class PositionalScheme(MappingScheme):
-
     """
     Implements the translation from and to the flagging scheme implemented by CHS
     """
diff --git a/saqc/core/translation/simplescheme.py b/saqc/core/translation/simplescheme.py
index aabd0472b55817696156ec156d036484a7f7264b..1ee136e19a0d4dad0c6214c63d1aa4d64bf19c68 100644
--- a/saqc/core/translation/simplescheme.py
+++ b/saqc/core/translation/simplescheme.py
@@ -10,7 +10,6 @@ from saqc.core.translation import MappingScheme
 
 
 class SimpleScheme(MappingScheme):
-
     """
     Acts as the default Translator, provides a changeable subset of the
     internal float flags
diff --git a/saqc/funcs/generic.py b/saqc/funcs/generic.py
index b03924585f9db6519461dcfd90a8fff62310e97a..94fa02eea9796a6e3d3891821d282d2fbc8bf751 100644
--- a/saqc/funcs/generic.py
+++ b/saqc/funcs/generic.py
@@ -25,8 +25,9 @@ class GenericFunction(Protocol):
     __name__: str
     __globals__: dict[str, Any]
 
-    def __call__(self, *args: pd.Series) -> pd.Series | pd.DataFrame | DictOfSeries:
-        ...  # pragma: no cover
+    def __call__(
+        self, *args: pd.Series
+    ) -> pd.Series | pd.DataFrame | DictOfSeries: ...  # pragma: no cover
 
 
 def _flagSelect(field: str, flags: Flags, label: str | None = None) -> pd.Series:
diff --git a/saqc/funcs/noise.py b/saqc/funcs/noise.py
index cde2b487c0e14dfbc1823beef6b2c1975280e5f1..18edfd7b1b3c16aef4dd970e6cab9aac3c706b89 100644
--- a/saqc/funcs/noise.py
+++ b/saqc/funcs/noise.py
@@ -36,8 +36,9 @@ class NoiseMixin:
         field: str,
         window: str | pd.Timedelta,
         thresh: float,
-        func: Literal["std", "var", "mad"]
-        | Callable[[np.ndarray, pd.Series], float] = "std",
+        func: (
+            Literal["std", "var", "mad"] | Callable[[np.ndarray, pd.Series], float]
+        ) = "std",
         sub_window: str | pd.Timedelta | None = None,
         sub_thresh: float | None = None,
         min_periods: int | None = None,
@@ -102,8 +103,9 @@ class NoiseMixin:
         field: str,
         window: str | pd.Timedelta,
         thresh: float,
-        func: Literal["std", "var", "mad"]
-        | Callable[[np.ndarray, pd.Series], float] = "std",
+        func: (
+            Literal["std", "var", "mad"] | Callable[[np.ndarray, pd.Series], float]
+        ) = "std",
         sub_window: str | pd.Timedelta | None = None,
         sub_thresh: float | None = None,
         min_periods: int | None = None,
diff --git a/saqc/lib/types.py b/saqc/lib/types.py
index d9acc44660eeafbaf32adf76ba3bedf640f27c71..8b5b6e5fa77b1e1c0f443f9bc50abdb694362808 100644
--- a/saqc/lib/types.py
+++ b/saqc/lib/types.py
@@ -30,8 +30,9 @@ ExternalFlag = Union[str, float, int]
 
 # needed for deeper type hinting magic
 class CurveFitter(Protocol):
-    def __call__(self, data: np.ndarray, *params: float) -> np.ndarray:
-        ...  # pragma: no cover
+    def __call__(
+        self, data: np.ndarray, *params: float
+    ) -> np.ndarray: ...  # pragma: no cover
 
 
 class Comparable(Protocol):