diff --git a/sdk/agentserver/azure-ai-agentserver-core/tests/test_tracing.py b/sdk/agentserver/azure-ai-agentserver-core/tests/test_tracing.py
index 7a1e52d295fa..a752bbf4dbdd 100644
--- a/sdk/agentserver/azure-ai-agentserver-core/tests/test_tracing.py
+++ b/sdk/agentserver/azure-ai-agentserver-core/tests/test_tracing.py
@@ -393,6 +393,7 @@ def _run(self, env: dict) -> dict:
             _tracing._setup_distro_export(
                 resource=Resource.create({}),
                 span_processors=[],
+                metric_readers=[],
                 log_record_processors=[],
                 connection_string="InstrumentationKey=00000000-0000-0000-0000-000000000000",
             )