diff --git a/tests/cli/throttler-schedule-spy.test.ts b/tests/cli/throttler-schedule-spy.test.ts
new file mode 100644
index 0000000..ee93530
--- /dev/null
+++ b/tests/cli/throttler-schedule-spy.test.ts
@@ -0,0 +1,54 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+import throttler from '../../src/github-throttler.js';
+import * as githubSync from '../../src/github-sync.js';
+import * as githubHelpers from '../../src/github.js';
+
+describe('github-sync throttler schedule usage (unit)', () => {
+  beforeEach(() => {
+    vi.restoreAllMocks();
+  });
+
+  it('calls throttler.schedule for GitHub API helpers', async () => {
+    const scheduleSpy = vi.spyOn(throttler, 'schedule');
+
+    const items = [
+      {
+        id: 'WI-1',
+        title: 'T1',
+        description: 'desc',
+        status: 'open',
+        priority: 'medium',
+        sortIndex: 0,
+        parentId: null,
+        createdAt: new Date().toISOString(),
+        updatedAt: new Date().toISOString(),
+        tags: [],
+        assignee: '',
+      },
+    ];
+    const comments: any[] = [];
+
+    // Stubs should schedule through the central throttler
+    vi.spyOn(githubHelpers as any, 'createGithubIssueAsync').mockImplementation(() =>
+      throttler.schedule(async () => ({ number: 1, id: 1, updatedAt: new Date().toISOString() }))
+    );
+    vi.spyOn(githubHelpers as any, 'updateGithubIssueAsync').mockImplementation(() =>
+      throttler.schedule(async () => ({ number: 1, id: 1, updatedAt: new Date().toISOString() }))
+    );
+    vi.spyOn(githubHelpers as any, 'listGithubIssueCommentsAsync').mockImplementation(() =>
+      throttler.schedule(async () => [])
+    );
+    vi.spyOn(githubHelpers as any, 'createGithubIssueCommentAsync').mockImplementation(() =>
+      throttler.schedule(async () => ({ id: 1, updatedAt: new Date().toISOString() }))
+    );
+    vi.spyOn(githubHelpers as any, 'updateGithubIssueCommentAsync').mockImplementation(() =>
+      throttler.schedule(async () => ({ id: 1, updatedAt: new Date().toISOString() }))
+    );
+
+    const config = { repo: 'owner/repo', labelPrefix: 'wl:' } as any;
+
+    await (githubSync as any).upsertIssuesFromWorkItems(items, comments, config);
+
+    expect(scheduleSpy).toHaveBeenCalled();
+  });
+});