diff --git a/clients/client-s3/test/e2e/features.e2e.spec.ts b/clients/client-s3/test/e2e/features.e2e.spec.ts
new file mode 100644
index 000000000000..ebca90595378
--- /dev/null
+++ b/clients/client-s3/test/e2e/features.e2e.spec.ts
@@ -0,0 +1,275 @@
+import fs from "node:fs";
+import path from "node:path";
+
+import { S3 } from "@aws-sdk/client-s3";
+import { afterAll, beforeAll, describe, expect, test as it } from "vitest";
+
+import { getIntegTestResources } from "../../../../tests/e2e/get-integ-test-resources";
+
+describe("@aws-sdk/client-s3", () => {
+  let client: S3;
+  let Bucket: string;
+  let region: string;
+
+  beforeAll(async () => {
+    const integTestResourcesEnv = await getIntegTestResources();
+    Object.assign(process.env, integTestResourcesEnv);
+
+    region = process?.env?.AWS_SMOKE_TEST_REGION as string;
+    Bucket = process?.env?.AWS_SMOKE_TEST_BUCKET as string;
+
+    client = new S3({ region });
+  });
+
+  async function putObject(Body: string, Key: string) {
+    await client.putObject({
+      Bucket,
+      Key,
+      Body,
+    });
+  }
+
+  async function putBuffer(Body: Uint8Array, Key: string) {
+    await client.putObject({
+      Bucket,
+      Key,
+      Body,
+    });
+  }
+
+  async function copyObject(from: string, to: string) {
+    await client.copyObject({
+      Bucket,
+      Key: to,
+      CopySource: `/${Bucket}/${from}`,
+    });
+  }
+
+  async function getObject(Key: string) {
+    return (
+      await client.getObject({
+        Bucket,
+        Key,
+      })
+    ).Body?.transformToString();
+  }
+
+  async function objectExists(Key: string) {
+    try {
+      await client.headObject({
+        Bucket,
+        Key,
+      });
+      return true;
+    } catch (e) {
+      return false;
+    }
+  }
+
+  async function deleteObject(Key: string) {
+    await client.deleteObject({
+      Bucket,
+      Key,
+    });
+  }
+
+  describe("CRUD operations", () => {
+    it("should perform basic CRUD operations on objects", async () => {
+      await putObject("world", "hello");
+      expect(await objectExists("hello")).toBe(true);
+
+      const obj = await getObject("hello");
+      expect(obj).toBe("world");
+
+      await putObject("new world", "hello");
+      expect(await objectExists("hello")).toBe(true);
+
+      const updatedObj = await getObject("hello");
+      expect(updatedObj).toBe("new world");
+
+      await deleteObject("hello");
+      expect(await objectExists("hello")).toBe(false);
+    });
+  });
+
+  describe("Content length", () => {
+    it("should handle content length", async () => {
+      await client.putObject({
+        Bucket,
+        Key: "contentlength",
+        Body: "foo",
+        ContentLength: 3,
+      });
+      expect(await objectExists("contentlength")).toBe(true);
+
+      const obj = await getObject("contentlength");
+      expect(obj).toBe("foo");
+    });
+  });
+
+  describe("Multi-byte strings", () => {
+    it("should handle multi-byte strings", async () => {
+      await putObject("åß∂ƒ©", "multi");
+      expect(await objectExists("multi")).toBe(true);
+
+      const obj = await client.getObject({
+        Bucket,
+        Key: "multi",
+      });
+
+      const str = String(await obj.Body?.transformToString());
+
+      expect(str).toBe("åß∂ƒ©");
+      expect(str.length).toBe(5);
+      expect(obj.ContentLength).toBe(11);
+    });
+  });
+
+  describe("Object copying", () => {
+    it("should copy objects", async () => {
+      await putObject("world", "hello");
+      await copyObject("hello", "byebye");
+
+      expect(await objectExists("byebye")).toBe(true);
+
+      const obj = await getObject("byebye");
+      expect(obj).toBe("world");
+
+      await deleteObject("byebye");
+    });
+  });
+
+  describe("Empty objects", () => {
+    it("should handle empty strings", async () => {
+      await putObject("", "blank");
+      expect(await objectExists("blank")).toBe(true);
+
+      const obj = await getObject("blank");
+      expect(obj).toBe("");
+      expect(obj).toHaveLength(0);
+    });
+  });
+
+  describe("Buffers", () => {
+    it("should handle empty buffers", async () => {
+      await putBuffer(Buffer.alloc(0), "emptybuffer");
+      expect(await objectExists("emptybuffer")).toBe(true);
+
+      const obj = await getObject("emptybuffer");
+      expect(obj).toHaveLength(0);
+    });
+
+    it("should handle small buffers", async () => {
+      await putBuffer(Buffer.alloc(1048576), "smallbuffer");
+      expect(await objectExists("smallbuffer")).toBe(true);
+
+      const obj = await getObject("smallbuffer");
+      expect(obj).toHaveLength(1048576);
+    });
+
+    it("should handle large buffers", async () => {
+      await putBuffer(Buffer.alloc(20971520), "largebuffer");
+      expect(await objectExists("largebuffer")).toBe(true);
+
+      const obj = await getObject("largebuffer");
+      expect(obj).toHaveLength(20971520);
+    });
+  });
+
+  describe("Files", () => {
+    beforeAll(async () => {
+      fs.writeFileSync(path.join(__dirname, "emptyfile"), "a".repeat(0));
+      fs.writeFileSync(path.join(__dirname, "smallfile"), "a".repeat(1048576));
+      fs.writeFileSync(path.join(__dirname, "largefile"), "a".repeat(20971520));
+    });
+
+    afterAll(async () => {
+      fs.rmSync(path.join(__dirname, "emptyfile"));
+      fs.rmSync(path.join(__dirname, "smallfile"));
+      fs.rmSync(path.join(__dirname, "largefile"));
+    });
+
+    it("should handle empty files", async () => {
+      await client.putObject({
+        Bucket,
+        Key: "emptyfile",
+        Body: fs.createReadStream(path.join(__dirname, "emptyfile")),
+      });
+      expect(await objectExists("emptyfile")).toBe(true);
+
+      const obj = await getObject("emptyfile");
+      expect(obj).toHaveLength(0);
+    });
+
+    it("should handle small files", async () => {
+      await client.putObject({
+        Bucket,
+        Key: "smallfile",
+        Body: fs.createReadStream(path.join(__dirname, "smallfile")),
+      });
+      expect(await objectExists("smallfile")).toBe(true);
+
+      const obj = await getObject("smallfile");
+      expect(obj).toHaveLength(1048576);
+    });
+
+    it("should handle large files", async () => {
+      await client.putObject({
+        Bucket,
+        Key: "largefile",
+        Body: fs.createReadStream(path.join(__dirname, "largefile")),
+      });
+      expect(await objectExists("largefile")).toBe(true);
+
+      const obj = await getObject("largefile");
+      expect(obj).toHaveLength(20971520);
+    });
+  });
+
+  // describe("Checksums", () => {
+  // it("should verify data integrity", async () => {
+  //   const data = "SOME SAMPLE DATA";
+  //   const checksum = generateMD5(data);
+  //
+  //   await putObject(data, "checksummed_data");
+  //   expect(await objectExists("checksummed_data")).toBe(true);
+  //
+  //   const obj = await getObject("checksummed_data");
+  //   expect(obj).toBe(data);
+  //   expect(obj).toHaveLength(16);
+  //   expect(generateMD5(obj)).toBe(checksum);
+  // });
+  // });
+
+  // describe("Pre-signed URLs", () => {
+  //   it("should handle pre-signed PUT/GET", async () => {
+  //     const putUrl = await getPresignedUrl("PUT", "presigned", "");
+  //     await putWithPresignedUrl(putUrl, "PRESIGNED BODY CONTENTS");
+  //
+  //     const getUrl = await getPresignedUrl("GET", "presigned");
+  //     const response = await getWithPresignedUrl(getUrl);
+  //     expect(response).toBe("PRESIGNED BODY CONTENTS");
+  //   });
+  //
+  //   it("should validate checksums", async () => {
+  //     const putUrl = await getPresignedUrl("PUT", "hello", "CHECKSUMMED");
+  //     const response = await putWithPresignedUrl(putUrl, "NOT CHECKSUMMED");
+  //     expect(response).toContain("SignatureDoesNotMatch");
+  //   });
+  // });
+  //
+  // describe("Proxy support", () => {
+  //   it("should work through proxy", async () => {
+  //     await putObject("world", "proxy_object");
+  //     expect(await objectExists("proxy_object")).toBe(true);
+  //
+  //     const obj = await getObject("proxy_object");
+  //     expect(obj).toBe("world");
+  //
+  //     await deleteObject("proxy_object");
+  //     expect(await objectExists("proxy_object")).toBe(false);
+  //
+  //     await teardownProxy();
+  //   });
+  // });
+}, 60_000);