diff --git a/test/fixtures/coverage-audit-fixture.ts b/test/fixtures/coverage-audit-fixture.ts
new file mode 100644
index 00000000..8a7adcc3
--- /dev/null
+++ b/test/fixtures/coverage-audit-fixture.ts
@@ -0,0 +1,76 @@
+/**
+ * Shared fixture for test coverage audit E2E tests.
+ *
+ * Creates a Node.js project with billing source code that has intentional
+ * test coverage gaps: processPayment has happy-path-only tests,
+ * refundPayment has no tests at all.
+ *
+ * Used by: ship-coverage-audit E2E, review-coverage-audit E2E
+ */
+
+import * as fs from 'fs';
+import * as path from 'path';
+import { spawnSync } from 'child_process';
+
+export function createCoverageAuditFixture(dir: string): void {
+  // Create a Node.js project WITH test framework but coverage gaps
+  fs.writeFileSync(path.join(dir, 'package.json'), JSON.stringify({
+    name: 'test-coverage-app',
+    version: '1.0.0',
+    type: 'module',
+    scripts: { test: 'echo "no tests yet"' },
+    devDependencies: { vitest: '^1.0.0' },
+  }, null, 2));
+
+  // Create vitest config
+  fs.writeFileSync(path.join(dir, 'vitest.config.ts'),
+    `import { defineConfig } from 'vitest/config';\nexport default defineConfig({ test: {} });\n`);
+
+  fs.writeFileSync(path.join(dir, 'VERSION'), '0.1.0.0\n');
+  fs.writeFileSync(path.join(dir, 'CHANGELOG.md'), '# Changelog\n');
+
+  // Create source file with multiple code paths
+  fs.mkdirSync(path.join(dir, 'src'), { recursive: true });
+  fs.writeFileSync(path.join(dir, 'src', 'billing.ts'), `
+export function processPayment(amount: number, currency: string) {
+  if (amount <= 0) throw new Error('Invalid amount');
+  if (currency !== 'USD' && currency !== 'EUR') throw new Error('Unsupported currency');
+  return { status: 'success', amount, currency };
+}
+
+export function refundPayment(paymentId: string, reason: string) {
+  if (!paymentId) throw new Error('Payment ID required');
+  if (!reason) throw new Error('Reason required');
+  return { status: 'refunded', paymentId, reason };
+}
+`);
+
+  // Create a test directory with ONE test (partial coverage)
+  fs.mkdirSync(path.join(dir, 'test'), { recursive: true });
+  fs.writeFileSync(path.join(dir, 'test', 'billing.test.ts'), `
+import { describe, test, expect } from 'vitest';
+import { processPayment } from '../src/billing';
+
+describe('processPayment', () => {
+  test('processes valid payment', () => {
+    const result = processPayment(100, 'USD');
+    expect(result.status).toBe('success');
+  });
+  // GAP: no test for invalid amount
+  // GAP: no test for unsupported currency
+  // GAP: refundPayment not tested at all
+});
+`);
+
+  // Init git repo with main branch
+  const run = (cmd: string, args: string[]) =>
+    spawnSync(cmd, args, { cwd: dir, stdio: 'pipe', timeout: 5000 });
+  run('git', ['init', '-b', 'main']);
+  run('git', ['config', 'user.email', 'test@test.com']);
+  run('git', ['config', 'user.name', 'Test']);
+  run('git', ['add', '.']);
+  run('git', ['commit', '-m', 'initial commit']);
+
+  // Create feature branch
+  run('git', ['checkout', '-b', 'feature/billing']);
+}
diff --git a/test/helpers/touchfiles.ts b/test/helpers/touchfiles.ts
index 53cc709c..effdbad0 100644
--- a/test/helpers/touchfiles.ts
+++ b/test/helpers/touchfiles.ts
@@ -83,8 +83,9 @@ export const E2E_TOUCHFILES: Record<string, string[]> = {
   // QA bootstrap
   'qa-bootstrap': ['qa/**', 'browse/src/**', 'ship/**'],
 
-  // Ship coverage audit
-  'ship-coverage-audit': ['ship/**'],
+  // Coverage audit (shared fixture)
+  'ship-coverage-audit': ['ship/**', 'test/fixtures/coverage-audit-fixture.ts'],
+  'review-coverage-audit': ['review/**', 'test/fixtures/coverage-audit-fixture.ts'],
 
   // Design
   'design-consultation-core':     ['design-consultation/**'],
diff --git a/test/skill-e2e.test.ts b/test/skill-e2e.test.ts
index 96019f70..2e576e5d 100644
--- a/test/skill-e2e.test.ts
+++ b/test/skill-e2e.test.ts
@@ -2727,66 +2727,9 @@ describeIfSelected('Test Coverage Audit E2E', ['ship-coverage-audit'], () => {
     copyDirSync(path.join(ROOT, 'ship'), path.join(coverageDir, 'ship'));
     copyDirSync(path.join(ROOT, 'review'), path.join(coverageDir, 'review'));
 
-    // Create a Node.js project WITH test framework but coverage gaps
-    fs.writeFileSync(path.join(coverageDir, 'package.json'), JSON.stringify({
-      name: 'test-coverage-app',
-      version: '1.0.0',
-      type: 'module',
-      scripts: { test: 'echo "no tests yet"' },
-      devDependencies: { vitest: '^1.0.0' },
-    }, null, 2));
-
-    // Create vitest config
-    fs.writeFileSync(path.join(coverageDir, 'vitest.config.ts'),
-      `import { defineConfig } from 'vitest/config';\nexport default defineConfig({ test: {} });\n`);
-
-    fs.writeFileSync(path.join(coverageDir, 'VERSION'), '0.1.0.0\n');
-    fs.writeFileSync(path.join(coverageDir, 'CHANGELOG.md'), '# Changelog\n');
-
-    // Create source file with multiple code paths
-    fs.mkdirSync(path.join(coverageDir, 'src'), { recursive: true });
-    fs.writeFileSync(path.join(coverageDir, 'src', 'billing.ts'), `
-export function processPayment(amount: number, currency: string) {
-  if (amount <= 0) throw new Error('Invalid amount');
-  if (currency !== 'USD' && currency !== 'EUR') throw new Error('Unsupported currency');
-  return { status: 'success', amount, currency };
-}
-
-export function refundPayment(paymentId: string, reason: string) {
-  if (!paymentId) throw new Error('Payment ID required');
-  if (!reason) throw new Error('Reason required');
-  return { status: 'refunded', paymentId, reason };
-}
-`);
-
-    // Create a test directory with ONE test (partial coverage)
-    fs.mkdirSync(path.join(coverageDir, 'test'), { recursive: true });
-    fs.writeFileSync(path.join(coverageDir, 'test', 'billing.test.ts'), `
-import { describe, test, expect } from 'vitest';
-import { processPayment } from '../src/billing';
-
-describe('processPayment', () => {
-  test('processes valid payment', () => {
-    const result = processPayment(100, 'USD');
-    expect(result.status).toBe('success');
-  });
-  // GAP: no test for invalid amount
-  // GAP: no test for unsupported currency
-  // GAP: refundPayment not tested at all
-});
-`);
-
-    // Init git repo with main branch
-    const run = (cmd: string, args: string[]) =>
-      spawnSync(cmd, args, { cwd: coverageDir, stdio: 'pipe', timeout: 5000 });
-    run('git', ['init', '-b', 'main']);
-    run('git', ['config', 'user.email', 'test@test.com']);
-    run('git', ['config', 'user.name', 'Test']);
-    run('git', ['add', '.']);
-    run('git', ['commit', '-m', 'initial commit']);
-
-    // Create feature branch
-    run('git', ['checkout', '-b', 'feature/billing']);
+    // Use shared fixture for billing project with coverage gaps
+    const { createCoverageAuditFixture } = require('./fixtures/coverage-audit-fixture');
+    createCoverageAuditFixture(coverageDir);
   });
 
   afterAll(() => {
@@ -2841,6 +2784,72 @@ Output the diagram directly.`,
   }, 180_000);
 });
 
+// --- Review Coverage Audit E2E ---
+
+describeIfSelected('Review Coverage Audit E2E', ['review-coverage-audit'], () => {
+  let reviewCoverageDir: string;
+
+  beforeAll(() => {
+    reviewCoverageDir = fs.mkdtempSync(path.join(os.tmpdir(), 'skill-e2e-review-coverage-'));
+
+    // Copy review skill files
+    copyDirSync(path.join(ROOT, 'review'), path.join(reviewCoverageDir, 'review'));
+
+    // Use shared fixture for billing project with coverage gaps
+    const { createCoverageAuditFixture } = require('./fixtures/coverage-audit-fixture');
+    createCoverageAuditFixture(reviewCoverageDir);
+  });
+
+  afterAll(() => {
+    try { fs.rmSync(reviewCoverageDir, { recursive: true, force: true }); } catch {}
+  });
+
+  test('/review Step 4.75 produces coverage diagram', async () => {
+    const result = await runSkillTest({
+      prompt: `Read the file review/SKILL.md for the review workflow instructions.
+
+You are on the feature/billing branch. The base branch is main.
+This is a test project — there is no remote, no PR to create.
+
+ONLY run Step 4.75 (Test Coverage Diagram) from the review workflow.
+Skip all other steps (scope drift, checklist, design review, fix-first, etc.).
+
+The source code is in ${reviewCoverageDir}/src/billing.ts.
+Existing tests are in ${reviewCoverageDir}/test/billing.test.ts.
+
+Produce the ASCII coverage diagram showing which code paths are tested and which have gaps.
+Output the diagram directly.`,
+      workingDirectory: reviewCoverageDir,
+      maxTurns: 15,
+      allowedTools: ['Bash', 'Read', 'Write', 'Edit', 'Glob', 'Grep'],
+      timeout: 120_000,
+      testName: 'review-coverage-audit',
+      runId,
+    });
+
+    logCost('/review coverage audit', result);
+    recordE2E('/review Step 4.75 coverage audit', 'Review Coverage Audit E2E', result, {
+      passed: result.exitReason === 'success',
+    });
+
+    expect(result.exitReason).toBe('success');
+
+    // Check output contains coverage diagram elements
+    const output = result.output || '';
+    const hasGap = output.includes('GAP') || output.includes('gap') || output.includes('NO TEST');
+    const hasTested = output.includes('TESTED') || output.includes('tested') || output.includes('✓');
+    const hasCoverage = output.includes('COVERAGE') || output.includes('coverage') || output.includes('paths tested');
+
+    console.log(`Output has GAP markers: ${hasGap}`);
+    console.log(`Output has TESTED markers: ${hasTested}`);
+    console.log(`Output has coverage summary: ${hasCoverage}`);
+
+    // At minimum, the agent should have read the source and test files
+    const readCalls = result.toolCalls.filter(tc => tc.tool === 'Read');
+    expect(readCalls.length).toBeGreaterThan(0);
+  }, 180_000);
+});
+
 // --- Codex skill E2E ---
 
 describeIfSelected('Codex skill E2E', ['codex-review'], () => {