diff --git a/src/uhi/typing/plottable.py b/src/uhi/typing/plottable.py
index ce463fa..967f570 100644
--- a/src/uhi/typing/plottable.py
+++ b/src/uhi/typing/plottable.py
@@ -70,8 +70,7 @@ class PlottableAxisGeneric(Protocol[T_co]):
     # available on all histograms and not part of the Protocol.
 
     @property
-    def traits(self) -> PlottableTraits:
-        ...
+    def traits(self) -> PlottableTraits: ...
 
     def __getitem__(self, index: int) -> T_co:
         """
@@ -105,12 +104,10 @@ def __iter__(self) -> Iterator[T_co]:
 @runtime_checkable
 class PlottableHistogram(Protocol):
     @property
-    def axes(self) -> Sequence[PlottableAxis]:
-        ...
+    def axes(self) -> Sequence[PlottableAxis]: ...
 
     @property
-    def kind(self) -> Kind:
-        ...
+    def kind(self) -> Kind: ...
 
     # All methods can have a flow=False argument - not part of this Protocol.
     # If this is included, it should return an array with flow bins added,