diff --git a/src/channels/ack-reactions.test.ts b/src/channels/ack-reactions.test.ts
index bd8698ef1a3..cdc10c88265 100644
--- a/src/channels/ack-reactions.test.ts
+++ b/src/channels/ack-reactions.test.ts
@@ -1,11 +1,14 @@
 import { describe, expect, it, vi } from "vitest";
-import { sleep } from "../utils.ts";
 import {
   removeAckReactionAfterReply,
   shouldAckReaction,
   shouldAckReactionForWhatsApp,
 } from "./ack-reactions.js";
 
+const flushMicrotasks = async () => {
+  await Promise.resolve();
+};
+
 describe("shouldAckReaction", () => {
   it("honors direct and group-all scopes", () => {
     expect(
@@ -238,7 +241,7 @@ describe("removeAckReactionAfterReply", () => {
       remove,
       onError,
     });
-    await sleep(0);
+    await flushMicrotasks();
     expect(remove).toHaveBeenCalledTimes(1);
     expect(onError).not.toHaveBeenCalled();
   });
@@ -251,19 +254,7 @@ describe("removeAckReactionAfterReply", () => {
       ackReactionValue: "👀",
       remove,
     });
-    await sleep(0);
-    expect(remove).not.toHaveBeenCalled();
-  });
-
-  it("skips when not configured", async () => {
-    const remove = vi.fn().mockResolvedValue(undefined);
-    removeAckReactionAfterReply({
-      removeAfterReply: false,
-      ackReactionPromise: Promise.resolve(true),
-      ackReactionValue: "👀",
-      remove,
-    });
-    await sleep(0);
+    await flushMicrotasks();
     expect(remove).not.toHaveBeenCalled();
   });
 });