diff --git a/src/auto-reply/reply/typing.test.ts b/src/auto-reply/reply/typing.test.ts
new file mode 100644
index 000000000..7ea4d2330
--- /dev/null
+++ b/src/auto-reply/reply/typing.test.ts
@@ -0,0 +1,33 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+
+import { createTypingController } from "./typing.js";
+
+describe("typing controller", () => {
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("stops after run completion and dispatcher idle", async () => {
+    vi.useFakeTimers();
+    const onReplyStart = vi.fn(async () => {});
+    const typing = createTypingController({
+      onReplyStart,
+      typingIntervalSeconds: 1,
+      typingTtlMs: 30_000,
+    });
+
+    await typing.startTypingLoop();
+    expect(onReplyStart).toHaveBeenCalledTimes(1);
+
+    vi.advanceTimersByTime(2_000);
+    expect(onReplyStart).toHaveBeenCalledTimes(3);
+
+    typing.markRunComplete();
+    vi.advanceTimersByTime(1_000);
+    expect(onReplyStart).toHaveBeenCalledTimes(4);
+
+    typing.markDispatchIdle();
+    vi.advanceTimersByTime(2_000);
+    expect(onReplyStart).toHaveBeenCalledTimes(4);
+  });
+});