diff --git a/bigquery-reservation/snippets/conftest.py b/bigquery-reservation/snippets/conftest.py
index 320cc074124a..1801372fe056 100644
--- a/bigquery-reservation/snippets/conftest.py
+++ b/bigquery-reservation/snippets/conftest.py
@@ -42,8 +42,10 @@ def project_id() -> str:
 
 
 @pytest.fixture(scope="session")
-def reservation_client() -> reservation_service.ReservationServiceClient:
-    return reservation_service.ReservationServiceClient()
+def reservation_client(
+    transport: str = "grpc",
+) -> reservation_service.ReservationServiceClient:
+    return reservation_service.ReservationServiceClient(transport=transport)
 
 
 @pytest.fixture(scope="session")
diff --git a/bigquery-reservation/snippets/quickstart.py b/bigquery-reservation/snippets/quickstart.py
index eb1227ca2dbb..2452da9d47f2 100644
--- a/bigquery-reservation/snippets/quickstart.py
+++ b/bigquery-reservation/snippets/quickstart.py
@@ -18,9 +18,11 @@
 from google.cloud import bigquery_reservation_v1
 
 
-def main(project_id: str = "your-project-id", location: str = "US") -> None:
+def main(
+    project_id: str = "your-project-id", location: str = "US", transport: str = "grpc"
+) -> None:
     # Constructs the client for interacting with the service.
-    client = bigquery_reservation_v1.ReservationServiceClient()
+    client = bigquery_reservation_v1.ReservationServiceClient(transport=transport)
 
     report_capacity_commitments(client, project_id, location)
     report_reservations(client, project_id, location)
diff --git a/bigquery-reservation/snippets/quickstart_test.py b/bigquery-reservation/snippets/quickstart_test.py
index 3ade3e40f0ed..85a0a8727d62 100644
--- a/bigquery-reservation/snippets/quickstart_test.py
+++ b/bigquery-reservation/snippets/quickstart_test.py
@@ -17,7 +17,10 @@
 from . import quickstart
 
 
-def test_quickstart(capsys: pytest.CaptureFixture, project_id: str) -> None:
-    quickstart.main(project_id)
+@pytest.mark.parametrize("transport", ["grpc", "rest"])
+def test_quickstart(
+    capsys: pytest.CaptureFixture, project_id: str, transport: str
+) -> None:
+    quickstart.main(project_id=project_id, transport=transport)
     out, _ = capsys.readouterr()
     assert " reservations processed." in out
diff --git a/bigquery-reservation/snippets/reservation_create.py b/bigquery-reservation/snippets/reservation_create.py
index bae295e880c6..efaaefe30986 100644
--- a/bigquery-reservation/snippets/reservation_create.py
+++ b/bigquery-reservation/snippets/reservation_create.py
@@ -16,12 +16,17 @@
 
 
 def create_reservation(
-    project_id: str, location: str, reservation_id: str, slot_capacity: str
+    project_id: str,
+    location: str,
+    reservation_id: str,
+    slot_capacity: str,
+    transport: str,
 ) -> reservation_types.Reservation:
     original_project_id = project_id
     original_location = location
     original_reservation_id = reservation_id
     original_slot_capacity = slot_capacity
+    original_transport = transport
 
     # [START bigqueryreservation_reservation_create]
     # TODO(developer): Set project_id to the project ID containing the
@@ -40,11 +45,15 @@ def create_reservation(
     # reservation.
     slot_capacity = 100
 
+    # TODO(developer): Choose a transport to use. Either 'grpc' or 'rest'
+    transport = "grpc"
+
     # [START_EXCLUDE]
     project_id = original_project_id
     location = original_location
     reservation_id = original_reservation_id
     slot_capacity = original_slot_capacity
+    transport = original_transport
     # [END_EXCLUDE]
 
     from google.cloud.bigquery_reservation_v1.services import reservation_service
@@ -52,7 +61,9 @@ def create_reservation(
         reservation as reservation_types,
     )
 
-    reservation_client = reservation_service.ReservationServiceClient()
+    reservation_client = reservation_service.ReservationServiceClient(
+        transport=transport
+    )
 
     parent = reservation_client.common_location_path(project_id, location)
 
diff --git a/bigquery-reservation/snippets/reservation_delete.py b/bigquery-reservation/snippets/reservation_delete.py
index b0537b5e16c5..a0f25ce1cf2f 100644
--- a/bigquery-reservation/snippets/reservation_delete.py
+++ b/bigquery-reservation/snippets/reservation_delete.py
@@ -13,10 +13,13 @@
 # limitations under the License.
 
 
-def delete_reservation(project_id: str, location: str, reservation_id: str) -> None:
+def delete_reservation(
+    project_id: str, location: str, reservation_id: str, transport: str
+) -> None:
     original_project_id = project_id
     original_location = location
     original_reservation_id = reservation_id
+    original_transport = transport
 
     # [START bigqueryreservation_reservation_delete]
     # TODO(developer): Set project_id to the project ID containing the
@@ -31,15 +34,21 @@ def delete_reservation(project_id: str, location: str, reservation_id: str) -> N
     # TODO(developer): Set reservation_id to a unique ID of the reservation.
     reservation_id = "sample-reservation"
 
+    # TODO(developer): Choose a transport to use. Either 'grpc' or 'rest'
+    transport = "grpc"
+
     # [START_EXCLUDE]
     project_id = original_project_id
     location = original_location
     reservation_id = original_reservation_id
+    transport = original_transport
     # [END_EXCLUDE]
 
     from google.cloud.bigquery_reservation_v1.services import reservation_service
 
-    reservation_client = reservation_service.ReservationServiceClient()
+    reservation_client = reservation_service.ReservationServiceClient(
+        transport=transport
+    )
     reservation_name = reservation_client.reservation_path(
         project_id, location, reservation_id
     )
diff --git a/bigquery-reservation/snippets/reservation_test.py b/bigquery-reservation/snippets/reservation_test.py
index e92fe9e9afc3..1270ba23251b 100644
--- a/bigquery-reservation/snippets/reservation_test.py
+++ b/bigquery-reservation/snippets/reservation_test.py
@@ -51,12 +51,17 @@ def reservation_id(
         pass
 
 
+@pytest.mark.parametrize("transport", ["grpc", "rest"])
 def test_reservation_samples(
-    capsys: pytest.CaptureFixture, project_id: str, location: str, reservation_id: str
+    capsys: pytest.CaptureFixture,
+    project_id: str,
+    location: str,
+    reservation_id: str,
+    transport: str,
 ) -> None:
     slot_capacity = 100
     reservation = reservation_create.create_reservation(
-        project_id, location, reservation_id, slot_capacity
+        project_id, location, reservation_id, slot_capacity, transport
     )
     assert reservation.slot_capacity == 100
     assert reservation_id in reservation.name
@@ -65,14 +70,16 @@ def test_reservation_samples(
 
     slot_capacity = 50
     reservation = reservation_update.update_reservation(
-        project_id, location, reservation_id, slot_capacity
+        project_id, location, reservation_id, slot_capacity, transport
     )
     assert reservation.slot_capacity == 50
     assert reservation_id in reservation.name
     out, _ = capsys.readouterr()
     assert f"Updated reservation: {reservation.name}" in out
 
-    reservation_delete.delete_reservation(project_id, location, reservation_id)
+    reservation_delete.delete_reservation(
+        project_id, location, reservation_id, transport
+    )
     out, _ = capsys.readouterr()
     assert "Deleted reservation" in out
     assert reservation_id in out
diff --git a/bigquery-reservation/snippets/reservation_update.py b/bigquery-reservation/snippets/reservation_update.py
index d43a96dc7b32..8afbd9d7d0f3 100644
--- a/bigquery-reservation/snippets/reservation_update.py
+++ b/bigquery-reservation/snippets/reservation_update.py
@@ -16,12 +16,17 @@
 
 
 def update_reservation(
-    project_id: str, location: str, reservation_id: str, slot_capacity: str
+    project_id: str,
+    location: str,
+    reservation_id: str,
+    slot_capacity: str,
+    transport: str,
 ) -> reservation_types.Reservation:
     original_project_id = project_id
     original_location = location
     original_reservation_id = reservation_id
     original_slot_capacity = slot_capacity
+    original_transport = transport
 
     # [START bigqueryreservation_reservation_update]
     # TODO(developer): Set project_id to the project ID containing the
@@ -40,11 +45,15 @@ def update_reservation(
     # reservation.
     slot_capacity = 50
 
+    # TODO(developer): Choose a transport to use. Either 'grpc' or 'rest'
+    transport = "grpc"
+
     # [START_EXCLUDE]
     project_id = original_project_id
     location = original_location
     reservation_id = original_reservation_id
     slot_capacity = original_slot_capacity
+    transport = original_transport
     # [END_EXCLUDE]
 
     from google.cloud.bigquery_reservation_v1.services import reservation_service
@@ -53,7 +62,9 @@ def update_reservation(
     )
     from google.protobuf import field_mask_pb2
 
-    reservation_client = reservation_service.ReservationServiceClient()
+    reservation_client = reservation_service.ReservationServiceClient(
+        transport=transport
+    )
 
     reservation_name = reservation_client.reservation_path(
         project_id, location, reservation_id