diff --git a/firecrown/likelihood/number_counts.py b/firecrown/likelihood/number_counts.py
index 39bc96d1..34adb6ea 100644
--- a/firecrown/likelihood/number_counts.py
+++ b/firecrown/likelihood/number_counts.py
@@ -477,6 +477,7 @@ def get_scale(self):
         assert self.current_tracer_args
         return self.current_tracer_args.scale
 
+
 class LinearBiasSystematicFactory(BaseModel):
     """Factory class for LinearBiasSystematic objects."""
 
diff --git a/firecrown/likelihood/source.py b/firecrown/likelihood/source.py
index 22a314a6..fab7aff6 100644
--- a/firecrown/likelihood/source.py
+++ b/firecrown/likelihood/source.py
@@ -33,6 +33,7 @@ class SourceSystematic(Updatable):
     def read(self, sacc_data: sacc.Sacc):
         """Call to allow this object to read from the appropriate sacc data."""
 
+
 class Source(Updatable):
     """An abstract source class (e.g., a sample of lenses).
 
@@ -248,6 +249,7 @@ def apply(self, tools: ModelingTools, tracer_arg: _SourceGalaxyArgsT):
             dndz=dndz,
         )
 
+
 class PhotoZShiftFactory(BaseModel):
     """Factory class for PhotoZShift objects."""
 
@@ -312,9 +314,9 @@ def __init__(
 
         self.sacc_tracer = sacc_tracer
         self.current_tracer_args: None | _SourceGalaxyArgsT = None
-        self.systematics: UpdatableCollection[SourceGalaxySystematic] = (
-            UpdatableCollection(systematics)
-        )
+        self.systematics: UpdatableCollection[
+            SourceGalaxySystematic
+        ] = UpdatableCollection(systematics)
         self.tracer_args: _SourceGalaxyArgsT
 
     def _read(self, sacc_data: sacc.Sacc):
diff --git a/firecrown/likelihood/weak_lensing.py b/firecrown/likelihood/weak_lensing.py
index a92fbc95..978c9080 100644
--- a/firecrown/likelihood/weak_lensing.py
+++ b/firecrown/likelihood/weak_lensing.py
@@ -431,6 +431,7 @@ def create_global(self) -> TattAlignmentSystematic:
         """
         return TattAlignmentSystematic(None)
 
+
 WeakLensingSystematicFactory = Annotated[
     MultiplicativeShearBiasFactory
     | LinearAlignmentSystematicFactory
@@ -446,9 +447,9 @@ class WeakLensingFactory(BaseModel):
     model_config = ConfigDict(extra="forbid", frozen=True)
 
     _cache: dict[int, WeakLensing] = PrivateAttr()
-    _global_systematics_instances: Sequence[SourceGalaxySystematic[WeakLensingArgs]] = (
-        PrivateAttr()
-    )
+    _global_systematics_instances: Sequence[
+        SourceGalaxySystematic[WeakLensingArgs]
+    ] = PrivateAttr()
 
     per_bin_systematics: Sequence[WeakLensingSystematicFactory]
     global_systematics: Sequence[WeakLensingSystematicFactory]