diff --git a/packages/google-cloud-policytroubleshooter/samples/generated/v1/iam_checker.troubleshoot_iam_policy.js b/packages/google-cloud-policytroubleshooter/samples/generated/v1/iam_checker.troubleshoot_iam_policy.js
index 82676c5b5c6..6206ea3e548 100644
--- a/packages/google-cloud-policytroubleshooter/samples/generated/v1/iam_checker.troubleshoot_iam_policy.js
+++ b/packages/google-cloud-policytroubleshooter/samples/generated/v1/iam_checker.troubleshoot_iam_policy.js
@@ -1,16 +1,21 @@
-// Copyright 2021 Google LLC
+// Copyright 2022 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
-//      http://www.apache.org/licenses/LICENSE-2.0
+//     https://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.
+//
+// ** This file is automatically generated by gapic-generator-typescript. **
+// ** https://github.com/googleapis/gapic-generator-typescript **
+// ** All changes to this file may be overwritten. **
+
 
 
 'use strict';
diff --git a/packages/google-cloud-policytroubleshooter/samples/generated/v1/snippet_metadata.google.cloud.policytroubleshooter.v1.json b/packages/google-cloud-policytroubleshooter/samples/generated/v1/snippet_metadata.google.cloud.policytroubleshooter.v1.json
new file mode 100644
index 00000000000..4f4183725eb
--- /dev/null
+++ b/packages/google-cloud-policytroubleshooter/samples/generated/v1/snippet_metadata.google.cloud.policytroubleshooter.v1.json
@@ -0,0 +1,55 @@
+{
+  "clientLibrary": {
+    "name": "nodejs-policytroubleshooter",
+    "version": "0.1.0",
+    "language": "TYPESCRIPT",
+    "apis": [
+      {
+        "id": "google.cloud.policytroubleshooter.v1",
+        "version": "v1"
+      }
+    ]
+  },
+  "snippets": [
+    {
+      "regionTag": "policytroubleshooter_v1_generated_IamChecker_TroubleshootIamPolicy_async",
+      "title": "IamChecker troubleshootIamPolicy Sample",
+      "origin": "API_DEFINITION",
+      "description": " Checks whether a member has a specific permission for a specific resource, and explains why the member does or does not have that permission.",
+      "canonical": true,
+      "file": "iam_checker.troubleshoot_iam_policy.js",
+      "language": "JAVASCRIPT",
+      "segments": [
+        {
+          "start": 25,
+          "end": 50,
+          "type": "FULL"
+        }
+      ],
+      "clientMethod": {
+        "shortName": "TroubleshootIamPolicy",
+        "fullName": "google.cloud.policytroubleshooter.v1.IamChecker.TroubleshootIamPolicy",
+        "async": true,
+        "parameters": [
+          {
+            "name": "access_tuple",
+            "type": ".google.cloud.policytroubleshooter.v1.AccessTuple"
+          }
+        ],
+        "resultType": ".google.cloud.policytroubleshooter.v1.TroubleshootIamPolicyResponse",
+        "client": {
+          "shortName": "IamCheckerClient",
+          "fullName": "google.cloud.policytroubleshooter.v1.IamCheckerClient"
+        },
+        "method": {
+          "shortName": "TroubleshootIamPolicy",
+          "fullName": "google.cloud.policytroubleshooter.v1.IamChecker.TroubleshootIamPolicy",
+          "service": {
+            "shortName": "IamChecker",
+            "fullName": "google.cloud.policytroubleshooter.v1.IamChecker"
+          }
+        }
+      }
+    }
+  ]
+}
diff --git a/packages/google-cloud-policytroubleshooter/src/v1/iam_checker_client.ts b/packages/google-cloud-policytroubleshooter/src/v1/iam_checker_client.ts
index 6df1fdd1996..6623db13b1d 100644
--- a/packages/google-cloud-policytroubleshooter/src/v1/iam_checker_client.ts
+++ b/packages/google-cloud-policytroubleshooter/src/v1/iam_checker_client.ts
@@ -386,9 +386,8 @@ export class IamCheckerClient {
    * @returns {Promise} A promise that resolves when the client is closed.
    */
   close(): Promise<void> {
-    this.initialize();
-    if (!this._terminated) {
-      return this.iamCheckerStub!.then(stub => {
+    if (this.iamCheckerStub && !this._terminated) {
+      return this.iamCheckerStub.then(stub => {
         this._terminated = true;
         stub.close();
       });
diff --git a/packages/google-cloud-policytroubleshooter/test/gapic_iam_checker_v1.ts b/packages/google-cloud-policytroubleshooter/test/gapic_iam_checker_v1.ts
index fbd7f64d1eb..884da56d4fb 100644
--- a/packages/google-cloud-policytroubleshooter/test/gapic_iam_checker_v1.ts
+++ b/packages/google-cloud-policytroubleshooter/test/gapic_iam_checker_v1.ts
@@ -88,12 +88,27 @@ describe('v1.IamCheckerClient', () => {
     assert(client.iamCheckerStub);
   });
 
-  it('has close method', () => {
+  it('has close method for the initialized client', done => {
     const client = new iamcheckerModule.v1.IamCheckerClient({
       credentials: {client_email: 'bogus', private_key: 'bogus'},
       projectId: 'bogus',
     });
-    client.close();
+    client.initialize();
+    assert(client.iamCheckerStub);
+    client.close().then(() => {
+      done();
+    });
+  });
+
+  it('has close method for the non-initialized client', done => {
+    const client = new iamcheckerModule.v1.IamCheckerClient({
+      credentials: {client_email: 'bogus', private_key: 'bogus'},
+      projectId: 'bogus',
+    });
+    assert.strictEqual(client.iamCheckerStub, undefined);
+    client.close().then(() => {
+      done();
+    });
   });
 
   it('has getProjectId method', async () => {
@@ -219,5 +234,22 @@ describe('v1.IamCheckerClient', () => {
           .calledWith(request, expectedOptions, undefined)
       );
     });
+
+    it('invokes troubleshootIamPolicy with closed client', async () => {
+      const client = new iamcheckerModule.v1.IamCheckerClient({
+        credentials: {client_email: 'bogus', private_key: 'bogus'},
+        projectId: 'bogus',
+      });
+      client.initialize();
+      const request = generateSampleMessage(
+        new protos.google.cloud.policytroubleshooter.v1.TroubleshootIamPolicyRequest()
+      );
+      const expectedError = new Error('The client has already been closed.');
+      client.close();
+      await assert.rejects(
+        client.troubleshootIamPolicy(request),
+        expectedError
+      );
+    });
   });
 });