diff --git a/src/agents/models-config.providers.auth-aliases.test.ts b/src/agents/models-config.providers.auth-aliases.test.ts
index d362aee1c5a..8a4f23f7c5d 100644
--- a/src/agents/models-config.providers.auth-aliases.test.ts
+++ b/src/agents/models-config.providers.auth-aliases.test.ts
@@ -1,5 +1,6 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
-import { createProviderAuthResolver } from "./models-config.providers.secrets.js";
+
+let createProviderAuthResolver: typeof import("./models-config.providers.secrets.js").createProviderAuthResolver;
 
 type MockManifestRegistry = {
   plugins: Array<{
@@ -65,10 +66,12 @@ vi.mock("../plugins/provider-runtime.js", () => ({
 }));
 
 describe("provider auth aliases", () => {
-  beforeEach(() => {
+  beforeEach(async () => {
+    vi.resetModules();
     loadPluginManifestRegistry.mockReset();
     loadPluginManifestRegistry.mockReturnValue(createFixtureProviderRegistry());
     resolveProviderSyntheticAuthWithPlugin.mockReset();
+    ({ createProviderAuthResolver } = await import("./models-config.providers.secrets.js"));
   });
 
   it("shares manifest env vars across aliased providers", () => {