diff --git a/tests/validate_test.py b/tests/validate_test.py
index 41aae5c..76935db 100644
--- a/tests/validate_test.py
+++ b/tests/validate_test.py
@@ -1,4 +1,3 @@
-from collections.abc import Sequence
 from pathlib import Path
 
 from wn import lmf