diff --git a/api_core/google/api_core/grpc_helpers.py b/api_core/google/api_core/grpc_helpers.py
index 329971e69336..6a2f052f8403 100644
--- a/api_core/google/api_core/grpc_helpers.py
+++ b/api_core/google/api_core/grpc_helpers.py
@@ -358,3 +358,7 @@ def subscribe(self, callback, try_to_connect=False):
     def unsubscribe(self, callback):
         """grpc.Channel.unsubscribe implementation."""
         pass
+
+    def close(self):
+        """grpc.Channel.close implementation."""
+        pass
diff --git a/api_core/tests/unit/test_grpc_helpers.py b/api_core/tests/unit/test_grpc_helpers.py
index a5bcced16614..e5e4311ee732 100644
--- a/api_core/tests/unit/test_grpc_helpers.py
+++ b/api_core/tests/unit/test_grpc_helpers.py
@@ -375,3 +375,7 @@ def test_subscribe_unsubscribe(self):
         channel = grpc_helpers.ChannelStub()
         assert channel.subscribe(None) is None
         assert channel.unsubscribe(None) is None
+
+    def test_close(self):
+        channel = grpc_helpers.ChannelStub()
+        assert channel.close() is None