diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f67ec338..356a9da0 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -149,6 +149,7 @@ jobs:
     permissions:
       contents: read
       id-token: write # needed for signing with GitHub OIDC Token
+      packages: write # needed for pushing to GitHub Container Registry
     steps:
       -
         name: Checkout
diff --git a/__tests__/sigstore/sigstore.test.itg.ts b/__tests__/sigstore/sigstore.test.itg.ts
index 4d549fc4..6fff3f63 100644
--- a/__tests__/sigstore/sigstore.test.itg.ts
+++ b/__tests__/sigstore/sigstore.test.itg.ts
@@ -18,7 +18,11 @@ import {beforeAll, describe, expect, jest, it, test} from '@jest/globals';
 import fs from 'fs';
 import * as path from 'path';
 
+import {Buildx} from '../../src/buildx/buildx';
+import {Build} from '../../src/buildx/build';
 import {Install as CosignInstall} from '../../src/cosign/install';
+import {Docker} from '../../src/docker/docker';
+import {Exec} from '../../src/exec';
 import {Sigstore} from '../../src/sigstore/sigstore';
 
 const fixturesDir = path.join(__dirname, '..', '.fixtures');
@@ -39,6 +43,57 @@ beforeAll(async () => {
   await cosignInstall.install(cosignBinPath);
 }, 100000);
 
+maybeIdToken('signAttestationManifests', () => {
+  it('build, sign and verify', async () => {
+    const buildx = new Buildx();
+    const build = new Build({buildx: buildx});
+    const imageName = 'ghcr.io/docker/actions-toolkit/test';
+
+    await expect(
+      (async () => {
+        await Docker.getExecOutput(['login', '--password-stdin', '--username', process.env.GITHUB_REPOSITORY_OWNER || 'docker', 'ghcr.io'], {
+          input: Buffer.from(process.env.GITHUB_TOKEN || '')
+        });
+      })()
+    ).resolves.not.toThrow();
+
+    await expect(
+      (async () => {
+        // prettier-ignore
+        const buildCmd = await buildx.getCommand([
+          '--builder', process.env.CTN_BUILDER_NAME ?? 'default',
+          'build',
+          '-f', path.join(fixturesDir, 'hello.Dockerfile'),
+          '--provenance=mode=max',
+          '--tag', `${imageName}:sigstore-itg`,
+          '--platform', 'linux/amd64,linux/arm64',
+          '--push',
+          '--metadata-file', build.getMetadataFilePath(),
+          fixturesDir
+        ]);
+        await Exec.exec(buildCmd.command, buildCmd.args);
+      })()
+    ).resolves.not.toThrow();
+
+    const metadata = build.resolveMetadata();
+    expect(metadata).toBeDefined();
+    const buildDigest = build.resolveDigest(metadata);
+    expect(buildDigest).toBeDefined();
+
+    const sigstore = new Sigstore();
+    const signResults = await sigstore.signAttestationManifests({
+      imageNames: [imageName],
+      imageDigest: buildDigest!
+    });
+    expect(Object.keys(signResults).length).toEqual(2);
+
+    const verifyResults = await sigstore.verifySignedManifests(signResults, {
+      certificateIdentityRegexp: `^https://github.com/docker/actions-toolkit/.github/workflows/test.yml.*$`
+    });
+    expect(Object.keys(verifyResults).length).toEqual(2);
+  }, 100000);
+});
+
 maybe('verifyImageAttestations', () => {
   test.each([
     ['moby/buildkit:master@sha256:84014da3581b2ff2c14cb4f60029cf9caa272b79e58f2e89c651ea6966d7a505', `^https://github.com/docker/github-builder-experimental/.github/workflows/bake.yml.*$`],