diff --git a/clients/client-s3/test/e2e/S3.browser.e2e.spec.ts b/clients/client-s3/test/e2e/S3.browser.e2e.spec.ts
index 5f90c00f9494..11724033d1c7 100644
--- a/clients/client-s3/test/e2e/S3.browser.e2e.spec.ts
+++ b/clients/client-s3/test/e2e/S3.browser.e2e.spec.ts
@@ -1,11 +1,11 @@
-import type { S3, SelectObjectContentEventStream } from "@aws-sdk/client-s3";
+import type { S3, SelectObjectContentEventStream, waitUntilObjectExists } from "@aws-sdk/client-s3";
 import { fromNodeProviderChain } from "@aws-sdk/credential-providers";
 import { FetchHttpHandler } from "@smithy/fetch-http-handler";
 import { afterAll, afterEach, beforeAll, beforeEach, describe, expect, onTestFailed, test as it } from "vitest";
 
 import { getIntegTestResources } from "../../../../tests/e2e/get-integ-test-resources";
 import { getRuntimeConfig } from "../../src/runtimeConfig.browser";
-import { S3 as S3Impl, waitUntilObjectExists } from "../browser-build/browser-s3-bundle";
+import { S3 as S3Impl, waitUntilObjectExists as waitUntilObjectExistsImpl } from "../browser-build/browser-s3-bundle";
 import { createBuffer } from "./helpers";
 
 describe("@aws-sdk/client-s3", () => {
@@ -242,8 +242,8 @@ describe("@aws-sdk/client-s3", () => {
       });
       expect(completeResult.$metadata.httpStatusCode).toEqual(200);
 
-      //validate the object is uploaded
-      const waiterState = await waitUntilObjectExists(
+      // validate the object is uploaded
+      const waiterState = await (waitUntilObjectExistsImpl as typeof waitUntilObjectExists)(
         {
           client,
           maxWaitTime: 60,
diff --git a/packages/credential-provider-node/src/credential-provider-node.integ.spec.ts b/packages/credential-provider-node/src/credential-provider-node.integ.spec.ts
index 63eb261cc41b..68e14f627a26 100644
--- a/packages/credential-provider-node/src/credential-provider-node.integ.spec.ts
+++ b/packages/credential-provider-node/src/credential-provider-node.integ.spec.ts
@@ -293,6 +293,17 @@ describe("credential-provider-node integration test", () => {
         aws_secret_access_key: "INI_STATIC_SECRET_KEY",
       });
 
+      sts = new STS({
+        region: "us-west-2",
+        logger: {
+          trace() {},
+          debug() {},
+          info() {},
+          warn() {},
+          error() {},
+        },
+      });
+
       await sts.getCallerIdentity({});
       const credentials = await sts.config.credentials();
 
diff --git a/packages/middleware-sdk-s3/src/s3-express/middleware-s3-express.integ.spec.ts b/packages/middleware-sdk-s3/src/s3-express/middleware-s3-express.integ.spec.ts
index 6273d3938f53..ac069197b867 100644
--- a/packages/middleware-sdk-s3/src/s3-express/middleware-s3-express.integ.spec.ts
+++ b/packages/middleware-sdk-s3/src/s3-express/middleware-s3-express.integ.spec.ts
@@ -1,6 +1,6 @@
 import { S3 } from "@aws-sdk/client-s3";
-import { AwsCredentialIdentity } from "@aws-sdk/types";
-import { describe, expect, expect, test as it } from "vitest";
+import { AwsCredentialIdentity, AwsSdkFeatures } from "@aws-sdk/types";
+import { describe, expect, test as it } from "vitest";
 
 import { requireRequestsFrom } from "../../../../private/aws-util-test/src";
 import { S3ExpressIdentity, S3ExpressIdentityProvider } from "./index";
@@ -94,7 +94,10 @@ describe("middleware-s3-express", () => {
 
       requireRequestsFrom(client).toMatch({
         headers: {
-          "user-agent": /(.*?) m\/(.*?)J(.*?)$/,
+          ["user-agent"](ua) {
+            const metadata = ua.match(/(.*?) m\/(.*?)$/)[2];
+            expect(metadata).toContain("J" as AwsSdkFeatures["S3_EXPRESS_BUCKET"]);
+          },
         },
       });
 
diff --git a/packages/middleware-user-agent/src/middleware-user-agent.integ.spec.ts b/packages/middleware-user-agent/src/middleware-user-agent.integ.spec.ts
index 657c7b81ca18..5c6b8e881789 100644
--- a/packages/middleware-user-agent/src/middleware-user-agent.integ.spec.ts
+++ b/packages/middleware-user-agent/src/middleware-user-agent.integ.spec.ts
@@ -1,7 +1,8 @@
 import { CodeCatalyst } from "@aws-sdk/client-codecatalyst";
 import { DynamoDB } from "@aws-sdk/client-dynamodb";
 import { DynamoDBDocument } from "@aws-sdk/lib-dynamodb";
-import { describe, test as it } from "vitest";
+import { AwsSdkFeatures } from "@aws-sdk/types";
+import { describe, expect, test as it } from "vitest";
 
 import { requireRequestsFrom } from "../../../private/aws-util-test/src";
 
@@ -38,7 +39,13 @@ describe("middleware-user-agent", () => {
 
       requireRequestsFrom(doc).toMatch({
         headers: {
-          "user-agent": /(.*?) m\/d,E,O,R$/,
+          ["user-agent"](ua) {
+            const metadata = ua.match(/(.*?) m\/(.*?)$/)[2];
+            expect(metadata).toContain("d" as AwsSdkFeatures["DDB_MAPPER"]);
+            expect(metadata).toContain("E" as AwsSdkFeatures["RETRY_MODE_STANDARD"]);
+            expect(metadata).toContain("O" as AwsSdkFeatures["ACCOUNT_ID_ENDPOINT"]);
+            expect(metadata).toContain("R" as AwsSdkFeatures["ACCOUNT_ID_MODE_REQUIRED"]);
+          },
         },
       });
 
diff --git a/private/aws-util-test/src/requests/test-http-handler.integ.spec.ts b/private/aws-util-test/src/requests/test-http-handler.integ.spec.ts
index 9c7f54f5bafe..85d8a8697da8 100644
--- a/private/aws-util-test/src/requests/test-http-handler.integ.spec.ts
+++ b/private/aws-util-test/src/requests/test-http-handler.integ.spec.ts
@@ -1,4 +1,4 @@
-import { test as it, describe, expect } from "vitest";
+import { describe, expect, test as it } from "vitest";
 
 // import { JsonProtocol } from "@aws-sdk/aws-protocoltests-json";
 // CI has difficult importing a named private client from the workspace.