diff --git a/tests/test_filters.py b/tests/test_filters.py
index 50f7975..e3f27ae 100644
--- a/tests/test_filters.py
+++ b/tests/test_filters.py
@@ -2,8 +2,6 @@
 import os
 
 import helics as h
-import os
-
 import pytest as pt
 
 from .utils import (