diff --git a/libs/langchain/tests/unit_tests/chains/rl_chain/test_rl_chain_base_embedder.py b/libs/langchain/tests/unit_tests/chains/rl_chain/test_rl_chain_base_embedder.py
index 7402c64d381..4ccc75868d2 100644
--- a/libs/langchain/tests/unit_tests/chains/rl_chain/test_rl_chain_base_embedder.py
+++ b/libs/langchain/tests/unit_tests/chains/rl_chain/test_rl_chain_base_embedder.py
@@ -1,5 +1,6 @@
 import pytest
 from test_utils import MockEncoder
+from typing import List
 
 import langchain.chains.rl_chain.base as base