diff --git a/.changeset/kind-cameras-crash.md b/.changeset/kind-cameras-crash.md
new file mode 100644
index 00000000000..869cd74461e
--- /dev/null
+++ b/.changeset/kind-cameras-crash.md
@@ -0,0 +1,5 @@
+---
+"@smithy/experimental-identity-and-auth": patch
+---
+
+Add `@aws.auth#sigv4` integration tests.
diff --git a/packages/experimental-identity-and-auth/src/integration/sigv4.integ.spec.ts b/packages/experimental-identity-and-auth/src/integration/sigv4.integ.spec.ts
new file mode 100644
index 00000000000..f93b359546b
--- /dev/null
+++ b/packages/experimental-identity-and-auth/src/integration/sigv4.integ.spec.ts
@@ -0,0 +1,117 @@
+import {
+  OnlySigv4AuthCommand,
+  OnlySigv4AuthOptionalCommand,
+  SameAsServiceCommand,
+  Sigv4ServiceClient,
+} from "@smithy/identity-and-auth-sigv4-service";
+import { AwsCredentialIdentity } from "@smithy/types";
+import { requireRequestsFrom } from "@smithy/util-test";
+
+describe("@aws.auth#sigv4 integration tests", () => {
+  // TODO(experimentalIdentityAndAuth): should match `Sigv4Service` `@aws.auth#sigv4` trait
+  const MOCK_CREDENTIALS: AwsCredentialIdentity = {
+    accessKeyId: "MOCK_ACCESS_KEY_ID",
+    secretAccessKey: "SECRET_ACCESS_KEY",
+    sessionToken: "SESSION_TOKEN",
+  };
+  const MOCK_REGION = "us-east-1";
+
+  // Arbitrary mock endpoint (`requireRequestsFrom()` intercepts network requests)
+  const MOCK_ENDPOINT = "https://foo.bar";
+
+  describe("`@aws.auth#sigv4` `region` configuration", () => {
+    it("Client should throw if `region` is not configured", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await expect(client.send(new OnlySigv4AuthOptionalCommand({}))).rejects.toThrow(
+        "expected `region` to be configured for `aws.auth#sigv4`"
+      );
+    });
+
+    it("Client should NOT throw if `region` is configured", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+      });
+      requireRequestsFrom(client).toMatch({
+        headers: {
+          Authorization: (value) => expect(value).toBeUndefined(),
+        },
+      });
+      await client.send(new OnlySigv4AuthOptionalCommand({}));
+    });
+  });
+
+  describe("Operation requires `@aws.auth#sigv4`", () => {
+    it("Request is thrown when `credentials` is not configured", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await expect(client.send(new OnlySigv4AuthCommand({}))).rejects.toThrow(
+        "HttpAuthScheme `aws.auth#sigv4` did not have an IdentityProvider configured."
+      );
+    });
+
+    it("Request is signed given configured `credentials`", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+        credentials: async () => MOCK_CREDENTIALS,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await client.send(new OnlySigv4AuthCommand({}));
+    });
+  });
+
+  describe("Operation has `@aws.auth#sigv4` and `@optionalAuth`", () => {
+    it("Request is NOT thrown and NOT signed when `credentials` is not configured", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+      });
+      requireRequestsFrom(client).toMatch({
+        headers: {
+          Authorization: (value) => expect(value).toBeUndefined(),
+        },
+      });
+      await client.send(new OnlySigv4AuthOptionalCommand({}));
+    });
+
+    it("Request is signed given configured `credentials`", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+        credentials: async () => MOCK_CREDENTIALS,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await client.send(new OnlySigv4AuthOptionalCommand({}));
+    });
+  });
+
+  describe("Service has `@aws.auth#sigv4`", () => {
+    it("Request is thrown when `credentials` is not configured", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await expect(client.send(new SameAsServiceCommand({}))).rejects.toThrow(
+        "HttpAuthScheme `aws.auth#sigv4` did not have an IdentityProvider configured."
+      );
+    });
+
+    it("Request is signed given configured `credentials`", async () => {
+      const client = new Sigv4ServiceClient({
+        endpoint: MOCK_ENDPOINT,
+        region: MOCK_REGION,
+        credentials: async () => MOCK_CREDENTIALS,
+      });
+      requireRequestsFrom(client).toMatch({});
+      await client.send(new SameAsServiceCommand({}));
+    });
+  });
+});
diff --git a/scripts/build-generated-test-packages.js b/scripts/build-generated-test-packages.js
index 892d95e7986..fbaf7581975 100644
--- a/scripts/build-generated-test-packages.js
+++ b/scripts/build-generated-test-packages.js
@@ -29,6 +29,13 @@ const weatherSsdkDir = path.join(
     "typescript-ssdk-codegen"
 )
 
+// TODO(experimentalIdentityAndAuth): add `@aws.auth#sigv4` client for integration tests
+const sigv4ClientDir = path.join(
+    codegenTestDir,
+    "identity-and-auth-sigv4",
+    "typescript-codegen"
+);
+
 const nodeModulesDir = path.join(root, "node_modules");
 
 const buildAndCopyToNodeModules = async (packageName, codegenDir, nodeModulesDir) => {
@@ -52,6 +59,8 @@ const buildAndCopyToNodeModules = async (packageName, codegenDir, nodeModulesDir
   try {
     await buildAndCopyToNodeModules("weather", weatherClientDir, nodeModulesDir);
     await buildAndCopyToNodeModules("weather-ssdk", weatherSsdkDir, nodeModulesDir);
+    // TODO(experimentalIdentityAndAuth): add `@aws.auth#sigv4` client for integration tests
+    await buildAndCopyToNodeModules("@smithy/identity-and-auth-sigv4-service", sigv4ClientDir, nodeModulesDir);
  } catch (e) {
     console.log(e);
     process.exit(1);
diff --git a/smithy-typescript-codegen-test/model/identity-and-auth/sigv4/Sigv4Service.smithy b/smithy-typescript-codegen-test/model/identity-and-auth/sigv4/Sigv4Service.smithy
new file mode 100644
index 00000000000..4ac2dca99f3
--- /dev/null
+++ b/smithy-typescript-codegen-test/model/identity-and-auth/sigv4/Sigv4Service.smithy
@@ -0,0 +1,28 @@
+$version: "2.0"
+
+namespace identity.auth.sigv4
+
+use aws.auth#sigv4
+use common#fakeProtocol
+
+@fakeProtocol
+@sigv4(name: "weather")
+service Sigv4Service {
+    operations: [
+        OnlySigv4Auth
+        OnlySigv4AuthOptional
+        SameAsService
+    ]
+}
+
+@http(method: "GET", uri: "/OnlySigv4Auth")
+@auth([sigv4])
+operation OnlySigv4Auth {}
+
+@http(method: "GET", uri: "/OnlySigv4AuthOptional")
+@auth([sigv4])
+@optionalAuth
+operation OnlySigv4AuthOptional {}
+
+@http(method: "GET", uri: "/SameAsService")
+operation SameAsService {}
diff --git a/smithy-typescript-codegen-test/smithy-build.json b/smithy-typescript-codegen-test/smithy-build.json
index f2166e741ba..5dca0966f00 100644
--- a/smithy-typescript-codegen-test/smithy-build.json
+++ b/smithy-typescript-codegen-test/smithy-build.json
@@ -74,6 +74,29 @@
                     }
                 }
             }
+        },
+        "identity-and-auth-sigv4": {
+            "transforms": [
+                {
+                    "name": "includeServices",
+                    "args": {
+                        "services": ["identity.auth.sigv4#Sigv4Service"]
+                    }
+                }
+            ],
+            "plugins": {
+                "typescript-codegen": {
+                    "service": "identity.auth.sigv4#Sigv4Service",
+                    "targetNamespace": "Sigv4Service",
+                    "package": "@smithy/identity-and-auth-sigv4-service",
+                    "packageVersion": "0.0.1",
+                    "packageJson": {
+                        "license": "Apache-2.0",
+                        "private": true
+                    },
+                    "experimentalIdentityAndAuth": true
+                }
+            }
         }
     },
     "plugins": {