diff --git a/src/pyrecest/_backend/pytorch/__init__.py b/src/pyrecest/_backend/pytorch/__init__.py
index 79eaf8364..33b226285 100644
--- a/src/pyrecest/_backend/pytorch/__init__.py
+++ b/src/pyrecest/_backend/pytorch/__init__.py
@@ -775,9 +775,7 @@ def assignment(x, values, indices, axis=0):
         x_new[indices] = values
         return x_new
     zip_indices = (
-        _is_iterable(indices)
-        and len(indices) > 0
-        and _is_iterable(indices[0])
+        _is_iterable(indices) and len(indices) > 0 and _is_iterable(indices[0])
     )
     len_indices = _assignment_index_length(indices, zip_indices)
     if zip_indices:
@@ -832,9 +830,7 @@ def assignment_by_sum(x, values, indices, axis=0):
         x_new[indices] += values
         return x_new
     zip_indices = (
-        _is_iterable(indices)
-        and len(indices) > 0
-        and _is_iterable(indices[0])
+        _is_iterable(indices) and len(indices) > 0 and _is_iterable(indices[0])
     )
     len_indices = _assignment_index_length(indices, zip_indices)
     if zip_indices:
diff --git a/src/pyrecest/_backend/pytorch/random.py b/src/pyrecest/_backend/pytorch/random.py
index 081b3a432..5c39c04ca 100644
--- a/src/pyrecest/_backend/pytorch/random.py
+++ b/src/pyrecest/_backend/pytorch/random.py
@@ -115,4 +115,4 @@ def multivariate_normal(mean, cov, size=None):
         size = ()
     elif not hasattr(size, "__iter__"):
         size = (size,)
-    return _MultivariateNormal(mean, cov).sample(size)
\ No newline at end of file
+    return _MultivariateNormal(mean, cov).sample(size)
diff --git a/src/pyrecest/utils/association_models.py b/src/pyrecest/utils/association_models.py
index 168d0bc35..2567b5ea5 100644
--- a/src/pyrecest/utils/association_models.py
+++ b/src/pyrecest/utils/association_models.py
@@ -453,4 +453,4 @@ def pairwise_cost_matrix(
             return -log(probabilities)
         if mode == "one_minus_probability":
             return 1.0 - probabilities
-        raise ValueError(f"Unsupported cost mode: {mode}")
\ No newline at end of file
+        raise ValueError(f"Unsupported cost mode: {mode}")
diff --git a/tests/backend_support/test_random_uniform_contract.py b/tests/backend_support/test_random_uniform_contract.py
index 85d7834c6..84e33013e 100644
--- a/tests/backend_support/test_random_uniform_contract.py
+++ b/tests/backend_support/test_random_uniform_contract.py
@@ -5,10 +5,8 @@
 import importlib.util
 
 import pytest
-
 from tests.support.backend_runner import run_backend_code
 
-
 _UNIFORM_ARRAY_BOUNDS_CHECK = """
 import pyrecest.backend as backend
 from pyrecest.backend import random
diff --git a/tests/test_association_models.py b/tests/test_association_models.py
index bd01cfb2e..5f76afedb 100644
--- a/tests/test_association_models.py
+++ b/tests/test_association_models.py
@@ -226,4 +226,4 @@ def test_calibrated_pairwise_association_model_uses_named_components(self):
 
 
 if __name__ == "__main__":
-    unittest.main()
\ No newline at end of file
+    unittest.main()
diff --git a/tests/test_backend_random.py b/tests/test_backend_random.py
index 22a0abf3a..880911d32 100644
--- a/tests/test_backend_random.py
+++ b/tests/test_backend_random.py
@@ -75,4 +75,4 @@ def test_jax_multinomial_uses_and_advances_global_state(self):
 
 
 if __name__ == "__main__":
-    unittest.main()
\ No newline at end of file
+    unittest.main()