diff --git a/packages/google-cloud-service-management/tests/unit/gapic/servicemanagement_v1/test_service_manager.py b/packages/google-cloud-service-management/tests/unit/gapic/servicemanagement_v1/test_service_manager.py
index 63cbafd6ce04..67aa3f1c9e78 100644
--- a/packages/google-cloud-service-management/tests/unit/gapic/servicemanagement_v1/test_service_manager.py
+++ b/packages/google-cloud-service-management/tests/unit/gapic/servicemanagement_v1/test_service_manager.py
@@ -70,6 +70,7 @@
 from google.protobuf import wrappers_pb2  # type: ignore
 import grpc
 from grpc.experimental import aio
+from proto.marshal.rules import wrappers
 from proto.marshal.rules.dates import DurationRule, TimestampRule
 import pytest