diff --git a/packages/google-cloud-network-management/google/cloud/network_management/gapic_version.py b/packages/google-cloud-network-management/google/cloud/network_management/gapic_version.py
index 785067d93b3c..558c8aab67c5 100644
--- a/packages/google-cloud-network-management/google/cloud/network_management/gapic_version.py
+++ b/packages/google-cloud-network-management/google/cloud/network_management/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.21.0"  # {x-release-please-version}
+__version__ = "0.0.0"  # {x-release-please-version}
diff --git a/packages/google-cloud-network-management/google/cloud/network_management_v1/gapic_version.py b/packages/google-cloud-network-management/google/cloud/network_management_v1/gapic_version.py
index 785067d93b3c..558c8aab67c5 100644
--- a/packages/google-cloud-network-management/google/cloud/network_management_v1/gapic_version.py
+++ b/packages/google-cloud-network-management/google/cloud/network_management_v1/gapic_version.py
@@ -13,4 +13,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-__version__ = "1.21.0"  # {x-release-please-version}
+__version__ = "0.0.0"  # {x-release-please-version}
diff --git a/packages/google-cloud-network-management/google/cloud/network_management_v1/types/connectivity_test.py b/packages/google-cloud-network-management/google/cloud/network_management_v1/types/connectivity_test.py
index 825d9da38825..dfa813a06996 100644
--- a/packages/google-cloud-network-management/google/cloud/network_management_v1/types/connectivity_test.py
+++ b/packages/google-cloud-network-management/google/cloud/network_management_v1/types/connectivity_test.py
@@ -132,6 +132,15 @@ class ConnectivityTest(proto.Message):
             creating a new test, updating an existing test,
             or triggering a one-time rerun of an existing
             test.
+        round_trip (bool):
+            Whether run analysis for the return path from
+            destination to source. Default value is false.
+        return_reachability_details (google.cloud.network_management_v1.types.ReachabilityDetails):
+            Output only. The reachability details of this
+            test from the latest run for the return path.
+            The details are updated when creating a new
+            test, updating an existing test, or triggering a
+            one-time rerun of an existing test.
         bypass_firewall_checks (bool):
             Whether the test should skip firewall
             checking. If not provided, we assume false.
@@ -192,6 +201,15 @@ class ConnectivityTest(proto.Message):
         number=14,
         message="ProbingDetails",
     )
+    round_trip: bool = proto.Field(
+        proto.BOOL,
+        number=15,
+    )
+    return_reachability_details: "ReachabilityDetails" = proto.Field(
+        proto.MESSAGE,
+        number=16,
+        message="ReachabilityDetails",
+    )
     bypass_firewall_checks: bool = proto.Field(
         proto.BOOL,
         number=17,
diff --git a/packages/google-cloud-network-management/samples/generated_samples/snippet_metadata_google.cloud.networkmanagement.v1.json b/packages/google-cloud-network-management/samples/generated_samples/snippet_metadata_google.cloud.networkmanagement.v1.json
index 3d2d6615bfef..a6a39ec02f7f 100644
--- a/packages/google-cloud-network-management/samples/generated_samples/snippet_metadata_google.cloud.networkmanagement.v1.json
+++ b/packages/google-cloud-network-management/samples/generated_samples/snippet_metadata_google.cloud.networkmanagement.v1.json
@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-network-management",
-    "version": "1.21.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {
diff --git a/packages/google-cloud-network-management/tests/unit/gapic/network_management_v1/test_reachability_service.py b/packages/google-cloud-network-management/tests/unit/gapic/network_management_v1/test_reachability_service.py
index c9f0c06a74cd..df0e32dd94b3 100644
--- a/packages/google-cloud-network-management/tests/unit/gapic/network_management_v1/test_reachability_service.py
+++ b/packages/google-cloud-network-management/tests/unit/gapic/network_management_v1/test_reachability_service.py
@@ -1726,6 +1726,7 @@ def test_get_connectivity_test(request_type, transport: str = "grpc"):
             protocol="protocol_value",
             related_projects=["related_projects_value"],
             display_name="display_name_value",
+            round_trip=True,
             bypass_firewall_checks=True,
         )
         response = client.get_connectivity_test(request)
@@ -1743,6 +1744,7 @@ def test_get_connectivity_test(request_type, transport: str = "grpc"):
     assert response.protocol == "protocol_value"
     assert response.related_projects == ["related_projects_value"]
     assert response.display_name == "display_name_value"
+    assert response.round_trip is True
     assert response.bypass_firewall_checks is True
 
 
@@ -1884,6 +1886,7 @@ async def test_get_connectivity_test_async(
                 protocol="protocol_value",
                 related_projects=["related_projects_value"],
                 display_name="display_name_value",
+                round_trip=True,
                 bypass_firewall_checks=True,
             )
         )
@@ -1902,6 +1905,7 @@ async def test_get_connectivity_test_async(
     assert response.protocol == "protocol_value"
     assert response.related_projects == ["related_projects_value"]
     assert response.display_name == "display_name_value"
+    assert response.round_trip is True
     assert response.bypass_firewall_checks is True
 
 
@@ -4855,6 +4859,7 @@ async def test_get_connectivity_test_empty_call_grpc_asyncio():
                 protocol="protocol_value",
                 related_projects=["related_projects_value"],
                 display_name="display_name_value",
+                round_trip=True,
                 bypass_firewall_checks=True,
             )
         )
@@ -5159,6 +5164,7 @@ def test_get_connectivity_test_rest_call_success(request_type):
             protocol="protocol_value",
             related_projects=["related_projects_value"],
             display_name="display_name_value",
+            round_trip=True,
             bypass_firewall_checks=True,
         )
 
@@ -5180,6 +5186,7 @@ def test_get_connectivity_test_rest_call_success(request_type):
     assert response.protocol == "protocol_value"
     assert response.related_projects == ["related_projects_value"]
     assert response.display_name == "display_name_value"
+    assert response.round_trip is True
     assert response.bypass_firewall_checks is True
 
 
@@ -5613,6 +5620,8 @@ def test_create_connectivity_test_rest_call_success(request_type):
                 "metropolitan_area": "metropolitan_area_value"
             },
         },
+        "round_trip": True,
+        "return_reachability_details": {},
         "bypass_firewall_checks": True,
     }
     # The version of a generated dependency at test runtime may differ from the version used during generation.
@@ -6139,6 +6148,8 @@ def test_update_connectivity_test_rest_call_success(request_type):
                 "metropolitan_area": "metropolitan_area_value"
             },
         },
+        "round_trip": True,
+        "return_reachability_details": {},
         "bypass_firewall_checks": True,
     }
     # The version of a generated dependency at test runtime may differ from the version used during generation.