diff --git a/raiden_contracts/tests/test_print_gas.py b/raiden_contracts/tests/test_print_gas.py
index 6f7b128c4..36dc493a8 100644
--- a/raiden_contracts/tests/test_print_gas.py
+++ b/raiden_contracts/tests/test_print_gas.py
@@ -1,4 +1,3 @@
-import json
 from typing import Callable, List
 
 import pytest