diff --git a/prefsampling/core/filters.py b/prefsampling/core/filters.py
index 14adb06..5650e47 100644
--- a/prefsampling/core/filters.py
+++ b/prefsampling/core/filters.py
@@ -1,6 +1,7 @@
 """
 Filters are functions that operate on collections of votes and apply some random operation to them.
 """
+
 from __future__ import annotations
 
 from collections.abc import MutableSequence, Callable
diff --git a/tests/test_samplers/ordinal/test_ordinal_mallows.py b/tests/test_samplers/ordinal/test_ordinal_mallows.py
index 9fd1ea3..a9de062 100644
--- a/tests/test_samplers/ordinal/test_ordinal_mallows.py
+++ b/tests/test_samplers/ordinal/test_ordinal_mallows.py
@@ -24,4 +24,3 @@ def test_phi_from_norm_phi(self):
 
     def test_impartial_central_vote(self):
         mallows(4, 5, phi=0.4, impartial_central_vote=True)
-        
\ No newline at end of file