diff --git a/protos/google/cloud/dialogflow/cx/v3beta1/test_case.proto b/protos/google/cloud/dialogflow/cx/v3beta1/test_case.proto
index 812f1269..42a05401 100644
--- a/protos/google/cloud/dialogflow/cx/v3beta1/test_case.proto
+++ b/protos/google/cloud/dialogflow/cx/v3beta1/test_case.proto
@@ -270,12 +270,29 @@ message TestConfig {
   // Session parameters to be compared when calculating differences.
   repeated string tracking_parameters = 1;
 
-  // Flow name. If not set, default start flow is assumed.
+  // Flow name to start the test case with.
   // Format: `projects/<Project ID>/locations/<Location ID>/agents/<Agent
   // ID>/flows/<Flow ID>`.
+  //
+  // Only one of `flow` and `page` should be set to indicate the starting point
+  // of the test case. If both are set, `page` takes precedence over `flow`. If
+  // neither is set, the test case will start with start page on the default
+  // start flow.
   string flow = 2 [(google.api.resource_reference) = {
                      type: "dialogflow.googleapis.com/Flow"
                    }];
+
+  // The [page][google.cloud.dialogflow.cx.v3beta1.Page] to start the test case with.
+  // Format: `projects/<Project ID>/locations/<Location ID>/agents/<Agent
+  // ID>/flows/<Flow ID>/pages/<Page ID>`.
+  //
+  // Only one of `flow` and `page` should be set to indicate the starting point
+  // of the test case. If both are set, `page` takes precedence over `flow`. If
+  // neither is set, the test case will start with start page on the default
+  // start flow.
+  string page = 3 [(google.api.resource_reference) = {
+                     type: "dialogflow.googleapis.com/Page"
+                   }];
 }
 
 // One interaction between a human and virtual agent. The human provides some
diff --git a/protos/protos.d.ts b/protos/protos.d.ts
index b38b72dd..5ef0abea 100644
--- a/protos/protos.d.ts
+++ b/protos/protos.d.ts
@@ -40205,6 +40205,9 @@ export namespace google {
 
                         /** TestConfig flow */
                         flow?: (string|null);
+
+                        /** TestConfig page */
+                        page?: (string|null);
                     }
 
                     /** Represents a TestConfig. */
@@ -40222,6 +40225,9 @@ export namespace google {
                         /** TestConfig flow. */
                         public flow: string;
 
+                        /** TestConfig page. */
+                        public page: string;
+
                         /**
                          * Creates a new TestConfig instance using the specified properties.
                          * @param [properties] Properties to set
diff --git a/protos/protos.js b/protos/protos.js
index a54ac946..383871b0 100644
--- a/protos/protos.js
+++ b/protos/protos.js
@@ -94068,6 +94068,7 @@
                              * @interface ITestConfig
                              * @property {Array.<string>|null} [trackingParameters] TestConfig trackingParameters
                              * @property {string|null} [flow] TestConfig flow
+                             * @property {string|null} [page] TestConfig page
                              */
     
                             /**
@@ -94102,6 +94103,14 @@
                              */
                             TestConfig.prototype.flow = "";
     
+                            /**
+                             * TestConfig page.
+                             * @member {string} page
+                             * @memberof google.cloud.dialogflow.cx.v3beta1.TestConfig
+                             * @instance
+                             */
+                            TestConfig.prototype.page = "";
+    
                             /**
                              * Creates a new TestConfig instance using the specified properties.
                              * @function create
@@ -94131,6 +94140,8 @@
                                         writer.uint32(/* id 1, wireType 2 =*/10).string(message.trackingParameters[i]);
                                 if (message.flow != null && Object.hasOwnProperty.call(message, "flow"))
                                     writer.uint32(/* id 2, wireType 2 =*/18).string(message.flow);
+                                if (message.page != null && Object.hasOwnProperty.call(message, "page"))
+                                    writer.uint32(/* id 3, wireType 2 =*/26).string(message.page);
                                 return writer;
                             };
     
@@ -94173,6 +94184,9 @@
                                     case 2:
                                         message.flow = reader.string();
                                         break;
+                                    case 3:
+                                        message.page = reader.string();
+                                        break;
                                     default:
                                         reader.skipType(tag & 7);
                                         break;
@@ -94218,6 +94232,9 @@
                                 if (message.flow != null && message.hasOwnProperty("flow"))
                                     if (!$util.isString(message.flow))
                                         return "flow: string expected";
+                                if (message.page != null && message.hasOwnProperty("page"))
+                                    if (!$util.isString(message.page))
+                                        return "page: string expected";
                                 return null;
                             };
     
@@ -94242,6 +94259,8 @@
                                 }
                                 if (object.flow != null)
                                     message.flow = String(object.flow);
+                                if (object.page != null)
+                                    message.page = String(object.page);
                                 return message;
                             };
     
@@ -94260,8 +94279,10 @@
                                 var object = {};
                                 if (options.arrays || options.defaults)
                                     object.trackingParameters = [];
-                                if (options.defaults)
+                                if (options.defaults) {
                                     object.flow = "";
+                                    object.page = "";
+                                }
                                 if (message.trackingParameters && message.trackingParameters.length) {
                                     object.trackingParameters = [];
                                     for (var j = 0; j < message.trackingParameters.length; ++j)
@@ -94269,6 +94290,8 @@
                                 }
                                 if (message.flow != null && message.hasOwnProperty("flow"))
                                     object.flow = message.flow;
+                                if (message.page != null && message.hasOwnProperty("page"))
+                                    object.page = message.page;
                                 return object;
                             };
     
diff --git a/protos/protos.json b/protos/protos.json
index a0d2d154..a703ad69 100644
--- a/protos/protos.json
+++ b/protos/protos.json
@@ -10995,6 +10995,13 @@
                               "options": {
                                 "(google.api.resource_reference).type": "dialogflow.googleapis.com/Flow"
                               }
+                            },
+                            "page": {
+                              "type": "string",
+                              "id": 3,
+                              "options": {
+                                "(google.api.resource_reference).type": "dialogflow.googleapis.com/Page"
+                              }
                             }
                           }
                         },
diff --git a/test/gapic_agents_v3.ts b/test/gapic_agents_v3.ts
index 135c9305..58415ec6 100644
--- a/test/gapic_agents_v3.ts
+++ b/test/gapic_agents_v3.ts
@@ -357,7 +357,6 @@ describe('v3.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getAgent(request), expectedError);
@@ -484,7 +483,6 @@ describe('v3.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateAgentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createAgent(request), expectedError);
@@ -615,7 +613,6 @@ describe('v3.AgentsClient', () => {
       );
       request.agent = {};
       request.agent.name = '';
-      const expectedHeaderRequestParams = 'agent.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateAgent(request), expectedError);
@@ -742,7 +739,6 @@ describe('v3.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteAgent(request), expectedError);
@@ -869,7 +865,6 @@ describe('v3.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.ValidateAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.validateAgent(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetAgentValidationResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_agents_v3beta1.ts b/test/gapic_agents_v3beta1.ts
index 617e645b..c185d04d 100644
--- a/test/gapic_agents_v3beta1.ts
+++ b/test/gapic_agents_v3beta1.ts
@@ -357,7 +357,6 @@ describe('v3beta1.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getAgent(request), expectedError);
@@ -484,7 +483,6 @@ describe('v3beta1.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateAgentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createAgent(request), expectedError);
@@ -615,7 +613,6 @@ describe('v3beta1.AgentsClient', () => {
       );
       request.agent = {};
       request.agent.name = '';
-      const expectedHeaderRequestParams = 'agent.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateAgent(request), expectedError);
@@ -742,7 +739,6 @@ describe('v3beta1.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteAgent(request), expectedError);
@@ -869,7 +865,6 @@ describe('v3beta1.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.ValidateAgentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.validateAgent(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3beta1.AgentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetAgentValidationResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_changelogs_v3.ts b/test/gapic_changelogs_v3.ts
index c37ea715..d99b0886 100644
--- a/test/gapic_changelogs_v3.ts
+++ b/test/gapic_changelogs_v3.ts
@@ -328,7 +328,6 @@ describe('v3.ChangelogsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetChangelogRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getChangelog(request), expectedError);
diff --git a/test/gapic_changelogs_v3beta1.ts b/test/gapic_changelogs_v3beta1.ts
index 33541527..29c0dcf3 100644
--- a/test/gapic_changelogs_v3beta1.ts
+++ b/test/gapic_changelogs_v3beta1.ts
@@ -328,7 +328,6 @@ describe('v3beta1.ChangelogsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetChangelogRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getChangelog(request), expectedError);
diff --git a/test/gapic_deployments_v3.ts b/test/gapic_deployments_v3.ts
index e26856a8..e7301d2c 100644
--- a/test/gapic_deployments_v3.ts
+++ b/test/gapic_deployments_v3.ts
@@ -328,7 +328,6 @@ describe('v3.DeploymentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetDeploymentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getDeployment(request), expectedError);
diff --git a/test/gapic_deployments_v3beta1.ts b/test/gapic_deployments_v3beta1.ts
index 639117c9..9f16902c 100644
--- a/test/gapic_deployments_v3beta1.ts
+++ b/test/gapic_deployments_v3beta1.ts
@@ -328,7 +328,6 @@ describe('v3beta1.DeploymentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetDeploymentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getDeployment(request), expectedError);
diff --git a/test/gapic_entity_types_v3.ts b/test/gapic_entity_types_v3.ts
index 82614496..173c8993 100644
--- a/test/gapic_entity_types_v3.ts
+++ b/test/gapic_entity_types_v3.ts
@@ -328,7 +328,6 @@ describe('v3.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getEntityType(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateEntityTypeRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createEntityType(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3.EntityTypesClient', () => {
       );
       request.entityType = {};
       request.entityType.name = '';
-      const expectedHeaderRequestParams = 'entity_type.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateEntityType(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteEntityType(request), expectedError);
diff --git a/test/gapic_entity_types_v3beta1.ts b/test/gapic_entity_types_v3beta1.ts
index 6c249e3e..007966c0 100644
--- a/test/gapic_entity_types_v3beta1.ts
+++ b/test/gapic_entity_types_v3beta1.ts
@@ -328,7 +328,6 @@ describe('v3beta1.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getEntityType(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3beta1.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateEntityTypeRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createEntityType(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3beta1.EntityTypesClient', () => {
       );
       request.entityType = {};
       request.entityType.name = '';
-      const expectedHeaderRequestParams = 'entity_type.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateEntityType(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3beta1.EntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteEntityType(request), expectedError);
diff --git a/test/gapic_environments_v3.ts b/test/gapic_environments_v3.ts
index d8728124..933a74fc 100644
--- a/test/gapic_environments_v3.ts
+++ b/test/gapic_environments_v3.ts
@@ -360,7 +360,6 @@ describe('v3.EnvironmentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetEnvironmentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getEnvironment(request), expectedError);
@@ -487,7 +486,6 @@ describe('v3.EnvironmentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteEnvironmentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteEnvironment(request), expectedError);
diff --git a/test/gapic_environments_v3beta1.ts b/test/gapic_environments_v3beta1.ts
index a00ded8c..78a18dea 100644
--- a/test/gapic_environments_v3beta1.ts
+++ b/test/gapic_environments_v3beta1.ts
@@ -362,7 +362,6 @@ describe('v3beta1.EnvironmentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetEnvironmentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getEnvironment(request), expectedError);
@@ -489,7 +488,6 @@ describe('v3beta1.EnvironmentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteEnvironmentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteEnvironment(request), expectedError);
diff --git a/test/gapic_experiments_v3.ts b/test/gapic_experiments_v3.ts
index c53c1778..1dcc929d 100644
--- a/test/gapic_experiments_v3.ts
+++ b/test/gapic_experiments_v3.ts
@@ -328,7 +328,6 @@ describe('v3.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getExperiment(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateExperimentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createExperiment(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3.ExperimentsClient', () => {
       );
       request.experiment = {};
       request.experiment.name = '';
-      const expectedHeaderRequestParams = 'experiment.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateExperiment(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteExperiment(request), expectedError);
@@ -840,7 +836,6 @@ describe('v3.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.StartExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.startExperiment(request), expectedError);
@@ -967,7 +962,6 @@ describe('v3.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.StopExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.stopExperiment(request), expectedError);
diff --git a/test/gapic_experiments_v3beta1.ts b/test/gapic_experiments_v3beta1.ts
index 382d51df..0373fac2 100644
--- a/test/gapic_experiments_v3beta1.ts
+++ b/test/gapic_experiments_v3beta1.ts
@@ -328,7 +328,6 @@ describe('v3beta1.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getExperiment(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3beta1.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateExperimentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createExperiment(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3beta1.ExperimentsClient', () => {
       );
       request.experiment = {};
       request.experiment.name = '';
-      const expectedHeaderRequestParams = 'experiment.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateExperiment(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3beta1.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteExperiment(request), expectedError);
@@ -840,7 +836,6 @@ describe('v3beta1.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.StartExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.startExperiment(request), expectedError);
@@ -967,7 +962,6 @@ describe('v3beta1.ExperimentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.StopExperimentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.stopExperiment(request), expectedError);
diff --git a/test/gapic_flows_v3.ts b/test/gapic_flows_v3.ts
index 84b59f94..cb6ae5c1 100644
--- a/test/gapic_flows_v3.ts
+++ b/test/gapic_flows_v3.ts
@@ -360,7 +360,6 @@ describe('v3.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateFlowRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createFlow(request), expectedError);
@@ -487,7 +486,6 @@ describe('v3.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteFlow(request), expectedError);
@@ -611,7 +609,6 @@ describe('v3.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getFlow(request), expectedError);
@@ -742,7 +739,6 @@ describe('v3.FlowsClient', () => {
       );
       request.flow = {};
       request.flow.name = '';
-      const expectedHeaderRequestParams = 'flow.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateFlow(request), expectedError);
@@ -869,7 +865,6 @@ describe('v3.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.ValidateFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.validateFlow(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetFlowValidationResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_flows_v3beta1.ts b/test/gapic_flows_v3beta1.ts
index 2e18fdd6..0a73e3bf 100644
--- a/test/gapic_flows_v3beta1.ts
+++ b/test/gapic_flows_v3beta1.ts
@@ -360,7 +360,6 @@ describe('v3beta1.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateFlowRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createFlow(request), expectedError);
@@ -487,7 +486,6 @@ describe('v3beta1.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteFlow(request), expectedError);
@@ -611,7 +609,6 @@ describe('v3beta1.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getFlow(request), expectedError);
@@ -742,7 +739,6 @@ describe('v3beta1.FlowsClient', () => {
       );
       request.flow = {};
       request.flow.name = '';
-      const expectedHeaderRequestParams = 'flow.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateFlow(request), expectedError);
@@ -869,7 +865,6 @@ describe('v3beta1.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.ValidateFlowRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.validateFlow(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3beta1.FlowsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetFlowValidationResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_intents_v3.ts b/test/gapic_intents_v3.ts
index 995b1749..fb66631c 100644
--- a/test/gapic_intents_v3.ts
+++ b/test/gapic_intents_v3.ts
@@ -325,7 +325,6 @@ describe('v3.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetIntentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getIntent(request), expectedError);
@@ -452,7 +451,6 @@ describe('v3.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateIntentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createIntent(request), expectedError);
@@ -583,7 +581,6 @@ describe('v3.IntentsClient', () => {
       );
       request.intent = {};
       request.intent.name = '';
-      const expectedHeaderRequestParams = 'intent.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateIntent(request), expectedError);
@@ -710,7 +707,6 @@ describe('v3.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteIntentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteIntent(request), expectedError);
diff --git a/test/gapic_intents_v3beta1.ts b/test/gapic_intents_v3beta1.ts
index 5654cc49..fdd43fa4 100644
--- a/test/gapic_intents_v3beta1.ts
+++ b/test/gapic_intents_v3beta1.ts
@@ -325,7 +325,6 @@ describe('v3beta1.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetIntentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getIntent(request), expectedError);
@@ -452,7 +451,6 @@ describe('v3beta1.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateIntentRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createIntent(request), expectedError);
@@ -583,7 +581,6 @@ describe('v3beta1.IntentsClient', () => {
       );
       request.intent = {};
       request.intent.name = '';
-      const expectedHeaderRequestParams = 'intent.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateIntent(request), expectedError);
@@ -710,7 +707,6 @@ describe('v3beta1.IntentsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteIntentRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteIntent(request), expectedError);
diff --git a/test/gapic_pages_v3.ts b/test/gapic_pages_v3.ts
index 6a1c0917..4b7b4a58 100644
--- a/test/gapic_pages_v3.ts
+++ b/test/gapic_pages_v3.ts
@@ -325,7 +325,6 @@ describe('v3.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetPageRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getPage(request), expectedError);
@@ -452,7 +451,6 @@ describe('v3.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreatePageRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createPage(request), expectedError);
@@ -583,7 +581,6 @@ describe('v3.PagesClient', () => {
       );
       request.page = {};
       request.page.name = '';
-      const expectedHeaderRequestParams = 'page.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updatePage(request), expectedError);
@@ -710,7 +707,6 @@ describe('v3.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeletePageRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deletePage(request), expectedError);
diff --git a/test/gapic_pages_v3beta1.ts b/test/gapic_pages_v3beta1.ts
index e0e9e339..97a2eb0a 100644
--- a/test/gapic_pages_v3beta1.ts
+++ b/test/gapic_pages_v3beta1.ts
@@ -325,7 +325,6 @@ describe('v3beta1.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetPageRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getPage(request), expectedError);
@@ -452,7 +451,6 @@ describe('v3beta1.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreatePageRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createPage(request), expectedError);
@@ -583,7 +581,6 @@ describe('v3beta1.PagesClient', () => {
       );
       request.page = {};
       request.page.name = '';
-      const expectedHeaderRequestParams = 'page.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updatePage(request), expectedError);
@@ -710,7 +707,6 @@ describe('v3beta1.PagesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeletePageRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deletePage(request), expectedError);
diff --git a/test/gapic_security_settings_service_v3.ts b/test/gapic_security_settings_service_v3.ts
index 165446e1..df7a495f 100644
--- a/test/gapic_security_settings_service_v3.ts
+++ b/test/gapic_security_settings_service_v3.ts
@@ -348,7 +348,6 @@ describe('v3.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateSecuritySettingsRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -483,7 +482,6 @@ describe('v3.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetSecuritySettingsRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getSecuritySettings(request), expectedError);
@@ -622,7 +620,6 @@ describe('v3.SecuritySettingsServiceClient', () => {
       );
       request.securitySettings = {};
       request.securitySettings.name = '';
-      const expectedHeaderRequestParams = 'security_settings.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -760,7 +757,6 @@ describe('v3.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteSecuritySettingsRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_security_settings_service_v3beta1.ts b/test/gapic_security_settings_service_v3beta1.ts
index 3c200396..b0ae7143 100644
--- a/test/gapic_security_settings_service_v3beta1.ts
+++ b/test/gapic_security_settings_service_v3beta1.ts
@@ -356,7 +356,6 @@ describe('v3beta1.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateSecuritySettingsRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -499,7 +498,6 @@ describe('v3beta1.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetSecuritySettingsRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getSecuritySettings(request), expectedError);
@@ -646,7 +644,6 @@ describe('v3beta1.SecuritySettingsServiceClient', () => {
       );
       request.securitySettings = {};
       request.securitySettings.name = '';
-      const expectedHeaderRequestParams = 'security_settings.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -792,7 +789,6 @@ describe('v3beta1.SecuritySettingsServiceClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteSecuritySettingsRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_session_entity_types_v3.ts b/test/gapic_session_entity_types_v3.ts
index 61902f2f..5b0b651f 100644
--- a/test/gapic_session_entity_types_v3.ts
+++ b/test/gapic_session_entity_types_v3.ts
@@ -331,7 +331,6 @@ describe('v3.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetSessionEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getSessionEntityType(request), expectedError);
@@ -462,7 +461,6 @@ describe('v3.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateSessionEntityTypeRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -600,7 +598,6 @@ describe('v3.SessionEntityTypesClient', () => {
       );
       request.sessionEntityType = {};
       request.sessionEntityType.name = '';
-      const expectedHeaderRequestParams = 'session_entity_type.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -734,7 +731,6 @@ describe('v3.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteSessionEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_session_entity_types_v3beta1.ts b/test/gapic_session_entity_types_v3beta1.ts
index 742e185c..e95def50 100644
--- a/test/gapic_session_entity_types_v3beta1.ts
+++ b/test/gapic_session_entity_types_v3beta1.ts
@@ -342,7 +342,6 @@ describe('v3beta1.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetSessionEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getSessionEntityType(request), expectedError);
@@ -477,7 +476,6 @@ describe('v3beta1.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateSessionEntityTypeRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -619,7 +617,6 @@ describe('v3beta1.SessionEntityTypesClient', () => {
       );
       request.sessionEntityType = {};
       request.sessionEntityType.name = '';
-      const expectedHeaderRequestParams = 'session_entity_type.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -757,7 +754,6 @@ describe('v3beta1.SessionEntityTypesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteSessionEntityTypeRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_sessions_v3.ts b/test/gapic_sessions_v3.ts
index 104cf1b3..7fa6c68d 100644
--- a/test/gapic_sessions_v3.ts
+++ b/test/gapic_sessions_v3.ts
@@ -281,7 +281,6 @@ describe('v3.SessionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DetectIntentRequest()
       );
       request.session = '';
-      const expectedHeaderRequestParams = 'session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.detectIntent(request), expectedError);
@@ -408,7 +407,6 @@ describe('v3.SessionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.MatchIntentRequest()
       );
       request.session = '';
-      const expectedHeaderRequestParams = 'session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.matchIntent(request), expectedError);
@@ -539,7 +537,6 @@ describe('v3.SessionsClient', () => {
       );
       request.matchIntentRequest = {};
       request.matchIntentRequest.session = '';
-      const expectedHeaderRequestParams = 'match_intent_request.session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.fulfillIntent(request), expectedError);
diff --git a/test/gapic_sessions_v3beta1.ts b/test/gapic_sessions_v3beta1.ts
index 2c3a3041..f2d07d85 100644
--- a/test/gapic_sessions_v3beta1.ts
+++ b/test/gapic_sessions_v3beta1.ts
@@ -281,7 +281,6 @@ describe('v3beta1.SessionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DetectIntentRequest()
       );
       request.session = '';
-      const expectedHeaderRequestParams = 'session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.detectIntent(request), expectedError);
@@ -408,7 +407,6 @@ describe('v3beta1.SessionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.MatchIntentRequest()
       );
       request.session = '';
-      const expectedHeaderRequestParams = 'session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.matchIntent(request), expectedError);
@@ -539,7 +537,6 @@ describe('v3beta1.SessionsClient', () => {
       );
       request.matchIntentRequest = {};
       request.matchIntentRequest.session = '';
-      const expectedHeaderRequestParams = 'match_intent_request.session=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.fulfillIntent(request), expectedError);
diff --git a/test/gapic_test_cases_v3.ts b/test/gapic_test_cases_v3.ts
index 9bcb26b6..68537a62 100644
--- a/test/gapic_test_cases_v3.ts
+++ b/test/gapic_test_cases_v3.ts
@@ -361,7 +361,6 @@ describe('v3.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.BatchDeleteTestCasesRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.batchDeleteTestCases(request), expectedError);
@@ -488,7 +487,6 @@ describe('v3.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetTestCaseRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getTestCase(request), expectedError);
@@ -615,7 +613,6 @@ describe('v3.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateTestCaseRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createTestCase(request), expectedError);
@@ -746,7 +743,6 @@ describe('v3.TestCasesClient', () => {
       );
       request.testCase = {};
       request.testCase.name = '';
-      const expectedHeaderRequestParams = 'test_case.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateTestCase(request), expectedError);
@@ -873,7 +869,6 @@ describe('v3.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CalculateCoverageRequest()
       );
       request.agent = '';
-      const expectedHeaderRequestParams = 'agent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.calculateCoverage(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetTestCaseResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getTestCaseResult(request), expectedError);
diff --git a/test/gapic_test_cases_v3beta1.ts b/test/gapic_test_cases_v3beta1.ts
index d7dc8355..fe65c87a 100644
--- a/test/gapic_test_cases_v3beta1.ts
+++ b/test/gapic_test_cases_v3beta1.ts
@@ -361,7 +361,6 @@ describe('v3beta1.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.BatchDeleteTestCasesRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.batchDeleteTestCases(request), expectedError);
@@ -488,7 +487,6 @@ describe('v3beta1.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetTestCaseRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getTestCase(request), expectedError);
@@ -615,7 +613,6 @@ describe('v3beta1.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateTestCaseRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createTestCase(request), expectedError);
@@ -746,7 +743,6 @@ describe('v3beta1.TestCasesClient', () => {
       );
       request.testCase = {};
       request.testCase.name = '';
-      const expectedHeaderRequestParams = 'test_case.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateTestCase(request), expectedError);
@@ -873,7 +869,6 @@ describe('v3beta1.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CalculateCoverageRequest()
       );
       request.agent = '';
-      const expectedHeaderRequestParams = 'agent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.calculateCoverage(request), expectedError);
@@ -1000,7 +995,6 @@ describe('v3beta1.TestCasesClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetTestCaseResultRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getTestCaseResult(request), expectedError);
diff --git a/test/gapic_transition_route_groups_v3.ts b/test/gapic_transition_route_groups_v3.ts
index 4736053d..37e2e358 100644
--- a/test/gapic_transition_route_groups_v3.ts
+++ b/test/gapic_transition_route_groups_v3.ts
@@ -346,7 +346,6 @@ describe('v3.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetTransitionRouteGroupRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -484,7 +483,6 @@ describe('v3.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateTransitionRouteGroupRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -626,7 +624,6 @@ describe('v3.TransitionRouteGroupsClient', () => {
       );
       request.transitionRouteGroup = {};
       request.transitionRouteGroup.name = '';
-      const expectedHeaderRequestParams = 'transition_route_group.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -764,7 +761,6 @@ describe('v3.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteTransitionRouteGroupRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_transition_route_groups_v3beta1.ts b/test/gapic_transition_route_groups_v3beta1.ts
index be227f47..444e2641 100644
--- a/test/gapic_transition_route_groups_v3beta1.ts
+++ b/test/gapic_transition_route_groups_v3beta1.ts
@@ -348,7 +348,6 @@ describe('v3beta1.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetTransitionRouteGroupRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -486,7 +485,6 @@ describe('v3beta1.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateTransitionRouteGroupRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -628,7 +626,6 @@ describe('v3beta1.TransitionRouteGroupsClient', () => {
       );
       request.transitionRouteGroup = {};
       request.transitionRouteGroup.name = '';
-      const expectedHeaderRequestParams = 'transition_route_group.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
@@ -766,7 +763,6 @@ describe('v3beta1.TransitionRouteGroupsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteTransitionRouteGroupRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(
diff --git a/test/gapic_versions_v3.ts b/test/gapic_versions_v3.ts
index ba67bfdf..a3500c71 100644
--- a/test/gapic_versions_v3.ts
+++ b/test/gapic_versions_v3.ts
@@ -360,7 +360,6 @@ describe('v3.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetVersionRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getVersion(request), expectedError);
@@ -491,7 +490,6 @@ describe('v3.VersionsClient', () => {
       );
       request.version = {};
       request.version.name = '';
-      const expectedHeaderRequestParams = 'version.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateVersion(request), expectedError);
@@ -618,7 +616,6 @@ describe('v3.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteVersionRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteVersion(request), expectedError);
@@ -745,7 +742,6 @@ describe('v3.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CompareVersionsRequest()
       );
       request.baseVersion = '';
-      const expectedHeaderRequestParams = 'base_version=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.compareVersions(request), expectedError);
diff --git a/test/gapic_versions_v3beta1.ts b/test/gapic_versions_v3beta1.ts
index 8f809a55..9882730d 100644
--- a/test/gapic_versions_v3beta1.ts
+++ b/test/gapic_versions_v3beta1.ts
@@ -360,7 +360,6 @@ describe('v3beta1.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetVersionRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getVersion(request), expectedError);
@@ -491,7 +490,6 @@ describe('v3beta1.VersionsClient', () => {
       );
       request.version = {};
       request.version.name = '';
-      const expectedHeaderRequestParams = 'version.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateVersion(request), expectedError);
@@ -618,7 +616,6 @@ describe('v3beta1.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteVersionRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteVersion(request), expectedError);
@@ -745,7 +742,6 @@ describe('v3beta1.VersionsClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CompareVersionsRequest()
       );
       request.baseVersion = '';
-      const expectedHeaderRequestParams = 'base_version=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.compareVersions(request), expectedError);
diff --git a/test/gapic_webhooks_v3.ts b/test/gapic_webhooks_v3.ts
index a48a3934..1b428da5 100644
--- a/test/gapic_webhooks_v3.ts
+++ b/test/gapic_webhooks_v3.ts
@@ -328,7 +328,6 @@ describe('v3.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.GetWebhookRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getWebhook(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.CreateWebhookRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createWebhook(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3.WebhooksClient', () => {
       );
       request.webhook = {};
       request.webhook.name = '';
-      const expectedHeaderRequestParams = 'webhook.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateWebhook(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3.DeleteWebhookRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteWebhook(request), expectedError);
diff --git a/test/gapic_webhooks_v3beta1.ts b/test/gapic_webhooks_v3beta1.ts
index 425b48b2..924ce3ee 100644
--- a/test/gapic_webhooks_v3beta1.ts
+++ b/test/gapic_webhooks_v3beta1.ts
@@ -328,7 +328,6 @@ describe('v3beta1.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.GetWebhookRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.getWebhook(request), expectedError);
@@ -455,7 +454,6 @@ describe('v3beta1.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.CreateWebhookRequest()
       );
       request.parent = '';
-      const expectedHeaderRequestParams = 'parent=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.createWebhook(request), expectedError);
@@ -586,7 +584,6 @@ describe('v3beta1.WebhooksClient', () => {
       );
       request.webhook = {};
       request.webhook.name = '';
-      const expectedHeaderRequestParams = 'webhook.name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.updateWebhook(request), expectedError);
@@ -713,7 +710,6 @@ describe('v3beta1.WebhooksClient', () => {
         new protos.google.cloud.dialogflow.cx.v3beta1.DeleteWebhookRequest()
       );
       request.name = '';
-      const expectedHeaderRequestParams = 'name=';
       const expectedError = new Error('The client has already been closed.');
       client.close();
       await assert.rejects(client.deleteWebhook(request), expectedError);