diff --git a/docs/en/samples/pre_post_processing/python/agent_test.py b/docs/en/samples/pre_post_processing/python/agent_test.py
index 785648d2fd..0a94e8a1e3 100644
--- a/docs/en/samples/pre_post_processing/python/agent_test.py
+++ b/docs/en/samples/pre_post_processing/python/agent_test.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 import asyncio
+import importlib
 import os
 from pathlib import Path