diff --git a/src/plugins/tools.optional.test.ts b/src/plugins/tools.optional.test.ts
index 0cf0430be80..b2528602415 100644
--- a/src/plugins/tools.optional.test.ts
+++ b/src/plugins/tools.optional.test.ts
@@ -1,4 +1,4 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 
 type MockRegistryToolEntry = {
   pluginId: string;
@@ -212,6 +212,10 @@ describe("resolvePluginTools optional tools", () => {
     resetPluginRuntimeStateForTest();
   });
 
+  afterEach(() => {
+    resetPluginRuntimeStateForTest?.();
+  });
+
   it("skips optional tools without explicit allowlist", () => {
     setOptionalDemoRegistry();
     const tools = resolveOptionalDemoTools();