diff --git a/extensions/acpx/src/runtime.test.ts b/extensions/acpx/src/runtime.test.ts
index 0c32065004e..0c5565a929c 100644
--- a/extensions/acpx/src/runtime.test.ts
+++ b/extensions/acpx/src/runtime.test.ts
@@ -1,6 +1,6 @@
 import os from "node:os";
 import path from "node:path";
-import { afterEach, describe, expect, it } from "vitest";
+import { afterAll, describe, expect, it } from "vitest";
 import { runAcpRuntimeAdapterContract } from "../../../src/acp/runtime/adapter-contract.testkit.js";
 import {
   cleanupMockRuntimeFixtures,
@@ -10,7 +10,7 @@ import {
 } from "./runtime-internals/test-fixtures.js";
 import { AcpxRuntime, decodeAcpxRuntimeHandleState } from "./runtime.js";
 
-afterEach(async () => {
+afterAll(async () => {
   await cleanupMockRuntimeFixtures();
 });