diff --git a/src/pspec_likelihood/__init__.py b/src/pspec_likelihood/__init__.py
index 2b9ec11..0fe595a 100644
--- a/src/pspec_likelihood/__init__.py
+++ b/src/pspec_likelihood/__init__.py
@@ -1,4 +1,5 @@
 """The PSpec Likelihood Package."""
+
 from . import likelihood
 from .arbitrary_linear_systematics import LikelihoodLinearSystematic
 from .likelihood import (
diff --git a/src/pspec_likelihood/arbitrary_linear_systematics.py b/src/pspec_likelihood/arbitrary_linear_systematics.py
index eb121ba..7f91b0e 100644
--- a/src/pspec_likelihood/arbitrary_linear_systematics.py
+++ b/src/pspec_likelihood/arbitrary_linear_systematics.py
@@ -1,4 +1,5 @@
 """Module responsible for computing the likelihood for linear systematics."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/src/pspec_likelihood/likelihood.py b/src/pspec_likelihood/likelihood.py
index c95766b..cf29852 100644
--- a/src/pspec_likelihood/likelihood.py
+++ b/src/pspec_likelihood/likelihood.py
@@ -1,4 +1,5 @@
 """Primary module defining likelihoods based on HERA power spectra."""
+
 from __future__ import annotations
 
 import warnings
@@ -733,12 +734,16 @@ def loglike(self, theory_params, sys_params) -> float:
         # them. "basis" corresponds to "A" in the memo.
         basis = self.linear_systematics_basis_function(
             sys_params,
-            self.model.kperp_bins_theory
-            if self.model.apply_window_to_systematics
-            else self.model.kperp_bins_obs,
-            self.model.kpar_bins_theory
-            if self.model.apply_window_to_systematics
-            else self.model.kpar_bins_obs,
+            (
+                self.model.kperp_bins_theory
+                if self.model.apply_window_to_systematics
+                else self.model.kperp_bins_obs
+            ),
+            (
+                self.model.kpar_bins_theory
+                if self.model.apply_window_to_systematics
+                else self.model.kpar_bins_obs
+            ),
         )
 
         mu_linear = self.get_mu_linear(basis)
diff --git a/src/pspec_likelihood/types.py b/src/pspec_likelihood/types.py
index 852126d..7225339 100644
--- a/src/pspec_likelihood/types.py
+++ b/src/pspec_likelihood/types.py
@@ -1,4 +1,5 @@
 """Types to be used throughout the package."""
+
 from __future__ import annotations
 
 from typing import Any, Callable
diff --git a/src/pspec_likelihood/utils.py b/src/pspec_likelihood/utils.py
index d21e318..016b27e 100644
--- a/src/pspec_likelihood/utils.py
+++ b/src/pspec_likelihood/utils.py
@@ -1,4 +1,5 @@
 """Miscellaneous utility functions."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/tests/test_likelihoods.py b/tests/test_likelihoods.py
index abba301..ab40e4b 100644
--- a/tests/test_likelihoods.py
+++ b/tests/test_likelihoods.py
@@ -1,4 +1,5 @@
 """Test loading an UVPspec file"""
+
 from __future__ import annotations
 
 import astropy.units as un
diff --git a/tests/test_uvpread.py b/tests/test_uvpread.py
index c577fe7..315704a 100644
--- a/tests/test_uvpread.py
+++ b/tests/test_uvpread.py
@@ -1,4 +1,5 @@
 """Test loading an UVPspec file"""
+
 from pathlib import Path
 
 import astropy.units as un