diff --git a/src/agents/models-config.auto-injects-github-copilot-provider-token-is.e2e.test.ts b/src/agents/models-config.auto-injects-github-copilot-provider-token-is.e2e.test.ts
index c5e9ac64369..77b4c63e94d 100644
--- a/src/agents/models-config.auto-injects-github-copilot-provider-token-is.e2e.test.ts
+++ b/src/agents/models-config.auto-injects-github-copilot-provider-token-is.e2e.test.ts
@@ -1,9 +1,11 @@
 import fs from "node:fs/promises";
 import path from "node:path";
-import { describe, expect, it, vi } from "vitest";
+import { describe, expect, it } from "vitest";
 import { captureEnv } from "../test-utils/env.js";
 import {
   installModelsConfigTestHooks,
+  mockCopilotTokenExchangeSuccess,
+  withCopilotGithubToken,
   withModelsTempHome as withTempHome,
 } from "./models-config.e2e-harness.js";
 import { ensureOpenClawModelsJson } from "./models-config.js";
@@ -13,19 +15,7 @@ installModelsConfigTestHooks({ restoreFetch: true });
 describe("models-config", () => {
   it("auto-injects github-copilot provider when token is present", async () => {
     await withTempHome(async (home) => {
-      const envSnapshot = captureEnv(["COPILOT_GITHUB_TOKEN"]);
-      process.env.COPILOT_GITHUB_TOKEN = "gh-token";
-      const fetchMock = vi.fn().mockResolvedValue({
-        ok: true,
-        status: 200,
-        json: async () => ({
-          token: "copilot-token;proxy-ep=proxy.copilot.example",
-          expires_at: Math.floor(Date.now() / 1000) + 3600,
-        }),
-      });
-      globalThis.fetch = fetchMock as unknown as typeof fetch;
-
-      try {
+      await withCopilotGithubToken("gh-token", async () => {
         const agentDir = path.join(home, "agent-default-base-url");
         await ensureOpenClawModelsJson({ models: { providers: {} } }, agentDir);
 
@@ -36,9 +26,7 @@ describe("models-config", () => {
 
         expect(parsed.providers["github-copilot"]?.baseUrl).toBe("https://api.copilot.example");
         expect(parsed.providers["github-copilot"]?.models?.length ?? 0).toBe(0);
-      } finally {
-        envSnapshot.restore();
-      }
+      });
     });
   });
 
@@ -49,15 +37,7 @@ describe("models-config", () => {
       process.env.GH_TOKEN = "gh-token";
       process.env.GITHUB_TOKEN = "github-token";
 
-      const fetchMock = vi.fn().mockResolvedValue({
-        ok: true,
-        status: 200,
-        json: async () => ({
-          token: "copilot-token;proxy-ep=proxy.copilot.example",
-          expires_at: Math.floor(Date.now() / 1000) + 3600,
-        }),
-      });
-      globalThis.fetch = fetchMock as unknown as typeof fetch;
+      const fetchMock = mockCopilotTokenExchangeSuccess();
 
       try {
         await ensureOpenClawModelsJson({ models: { providers: {} } });
diff --git a/src/agents/models-config.e2e-harness.ts b/src/agents/models-config.e2e-harness.ts
index 9b8ba534aa6..3c1e59d9730 100644
--- a/src/agents/models-config.e2e-harness.ts
+++ b/src/agents/models-config.e2e-harness.ts
@@ -71,6 +71,17 @@ export function mockCopilotTokenExchangeSuccess(): MockFn {
   return fetchMock;
 }
 
+export async function withCopilotGithubToken<T>(
+  token: string,
+  fn: (fetchMock: MockFn) => Promise<T>,
+): Promise<T> {
+  return withTempEnv(["COPILOT_GITHUB_TOKEN"], async () => {
+    process.env.COPILOT_GITHUB_TOKEN = token;
+    const fetchMock = mockCopilotTokenExchangeSuccess();
+    return fn(fetchMock);
+  });
+}
+
 export const MODELS_CONFIG_IMPLICIT_ENV_VARS = [
   "CLOUDFLARE_AI_GATEWAY_API_KEY",
   "COPILOT_GITHUB_TOKEN",
diff --git a/src/agents/models-config.uses-first-github-copilot-profile-env-tokens.e2e.test.ts b/src/agents/models-config.uses-first-github-copilot-profile-env-tokens.e2e.test.ts
index ff55eb8e697..50b80f2eb0e 100644
--- a/src/agents/models-config.uses-first-github-copilot-profile-env-tokens.e2e.test.ts
+++ b/src/agents/models-config.uses-first-github-copilot-profile-env-tokens.e2e.test.ts
@@ -1,11 +1,11 @@
 import fs from "node:fs/promises";
 import path from "node:path";
-import { describe, expect, it, vi } from "vitest";
-import { captureEnv } from "../test-utils/env.js";
+import { describe, expect, it } from "vitest";
 import { resolveOpenClawAgentDir } from "./agent-paths.js";
 import {
   installModelsConfigTestHooks,
   mockCopilotTokenExchangeSuccess,
+  withCopilotGithubToken,
   withUnsetCopilotTokenEnv,
   withModelsTempHome as withTempHome,
 } from "./models-config.e2e-harness.js";
@@ -53,19 +53,7 @@ describe("models-config", () => {
 
   it("does not override explicit github-copilot provider config", async () => {
     await withTempHome(async () => {
-      const envSnapshot = captureEnv(["COPILOT_GITHUB_TOKEN"]);
-      process.env.COPILOT_GITHUB_TOKEN = "gh-token";
-      const fetchMock = vi.fn().mockResolvedValue({
-        ok: true,
-        status: 200,
-        json: async () => ({
-          token: "copilot-token;proxy-ep=proxy.copilot.example",
-          expires_at: Math.floor(Date.now() / 1000) + 3600,
-        }),
-      });
-      globalThis.fetch = fetchMock as unknown as typeof fetch;
-
-      try {
+      await withCopilotGithubToken("gh-token", async () => {
         await ensureOpenClawModelsJson({
           models: {
             providers: {
@@ -85,9 +73,7 @@ describe("models-config", () => {
         };
 
         expect(parsed.providers["github-copilot"]?.baseUrl).toBe("https://copilot.local");
-      } finally {
-        envSnapshot.restore();
-      }
+      });
     });
   });
 });