diff --git a/tests/utils/test_transaction_utils.py b/tests/utils/test_transaction_utils.py
index 86a5564..737a561 100644
--- a/tests/utils/test_transaction_utils.py
+++ b/tests/utils/test_transaction_utils.py
@@ -1,5 +1,3 @@
-from audioop import add
-import pytest
 from conflux_web3 import Web3
 from conflux_web3._utils.transactions import fill_transaction_defaults
 from cfx_address import Base32Address