diff --git a/vertexai/_genai/_evals_common.py b/vertexai/_genai/_evals_common.py
index 97e56c9e19..8ff608c2c5 100644
--- a/vertexai/_genai/_evals_common.py
+++ b/vertexai/_genai/_evals_common.py
@@ -133,6 +133,7 @@ def _get_agent_engine_instance(
         client = vertexai.Client(
             project=api_client.project,
             location=api_client.location,
+            http_options=api_client._http_options,
         )
         _thread_local_data.agent_engine_instances[agent_name] = (
             client.agent_engines.get(name=agent_name)