diff --git a/bpl/_util.py b/bpl/_util.py
index 4d2695c..c0189f6 100644
--- a/bpl/_util.py
+++ b/bpl/_util.py
@@ -1,4 +1,5 @@
 """Private utility functions."""
+
 from typing import Iterable, Optional, Tuple, Union
 
 import jax
diff --git a/bpl/base.py b/bpl/base.py
index f481ab3..ff3d357 100644
--- a/bpl/base.py
+++ b/bpl/base.py
@@ -1,4 +1,5 @@
 """Implementation of the probabilistic model for soccer matches."""
+
 from __future__ import annotations
 
 from abc import abstractmethod
diff --git a/bpl/dixon_coles.py b/bpl/dixon_coles.py
index c0d2709..2e90f1c 100644
--- a/bpl/dixon_coles.py
+++ b/bpl/dixon_coles.py
@@ -1,4 +1,5 @@
 """Implementation of a simple team level model."""
+
 from __future__ import annotations
 
 from typing import Any, Dict, Iterable, Optional, Tuple, Union
diff --git a/bpl/dynamic_dixon_coles.py b/bpl/dynamic_dixon_coles.py
index 848c08c..7d5e5ab 100644
--- a/bpl/dynamic_dixon_coles.py
+++ b/bpl/dynamic_dixon_coles.py
@@ -1,4 +1,5 @@
 """Implementation of the neutral model with dynamic parameters in the current version of bpl."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/bpl/extended_dixon_coles.py b/bpl/extended_dixon_coles.py
index a614455..0540c39 100644
--- a/bpl/extended_dixon_coles.py
+++ b/bpl/extended_dixon_coles.py
@@ -1,4 +1,5 @@
 """Implementation of the model in the current version of bpl."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/bpl/neutral_dixon_coles.py b/bpl/neutral_dixon_coles.py
index 2dba0d7..98d7340 100644
--- a/bpl/neutral_dixon_coles.py
+++ b/bpl/neutral_dixon_coles.py
@@ -1,4 +1,5 @@
 """Implementation of the neutral model for predicting the World Cup."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/bpl/neutral_dixon_coles_WC.py b/bpl/neutral_dixon_coles_WC.py
index 272213e..151cea9 100644
--- a/bpl/neutral_dixon_coles_WC.py
+++ b/bpl/neutral_dixon_coles_WC.py
@@ -1,4 +1,5 @@
 """Implementation of the neutral model for predicting the World Cup."""
+
 from __future__ import annotations
 
 import warnings
diff --git a/tests/test_all_models.py b/tests/test_all_models.py
index 21ba19e..2b0917b 100644
--- a/tests/test_all_models.py
+++ b/tests/test_all_models.py
@@ -1,4 +1,5 @@
 """Shared tests across all models, e.g. checking probabilities are valid."""
+
 import jax.numpy as jnp
 import pytest
 
diff --git a/tests/test_neutral_dixon_coles.py b/tests/test_neutral_dixon_coles.py
index 00a9340..bd4ff08 100644
--- a/tests/test_neutral_dixon_coles.py
+++ b/tests/test_neutral_dixon_coles.py
@@ -6,6 +6,7 @@
 
 TOL = 1e-02
 
+
 @pytest.fixture
 def model(neutral_dummy_data):
     return NeutralDixonColesMatchPredictor().fit(neutral_dummy_data)
diff --git a/tests/test_neutral_dixon_coles_WC.py b/tests/test_neutral_dixon_coles_WC.py
index fecd0ef..8c56911 100644
--- a/tests/test_neutral_dixon_coles_WC.py
+++ b/tests/test_neutral_dixon_coles_WC.py
@@ -6,6 +6,7 @@
 
 TOL = 5e-02
 
+
 @pytest.fixture
 def model(neutral_dummy_data):
     return NeutralDixonColesMatchPredictorWC().fit(neutral_dummy_data)
@@ -97,7 +98,9 @@ def test_predict_concede_n_proba(model):
     assert len(proba_team_concede) == 1
     assert (proba_team_concede[0] >= 0) and (proba_team_concede[0] <= 1)
 
-    proba_opponent_score = model.predict_score_n_proba(1, "1", "0", "0", "1", home=False)
+    proba_opponent_score = model.predict_score_n_proba(
+        1, "1", "0", "0", "1", home=False
+    )
     assert proba_team_concede.tolist() == pytest.approx(
         proba_opponent_score.tolist(), abs=TOL
     )