diff --git a/src/agents/embedded-agent-runner/openrouter-model-capabilities.test.ts b/src/agents/embedded-agent-runner/openrouter-model-capabilities.test.ts
index 95f68dc0c93f..37d385565a18 100644
--- a/src/agents/embedded-agent-runner/openrouter-model-capabilities.test.ts
+++ b/src/agents/embedded-agent-runner/openrouter-model-capabilities.test.ts
@@ -5,27 +5,33 @@ import { join } from "node:path";
 import { resetPluginStateStoreForTests } from "openclaw/plugin-sdk/plugin-state-test-runtime";
 import { importFreshModule } from "openclaw/plugin-sdk/test-fixtures";
 import { afterEach, describe, expect, it, vi } from "vitest";
+import { withEnvAsync } from "../../test-utils/env.js";
 
 async function withOpenRouterStateDir(run: (stateDir: string) => Promise<void>) {
   // Each case gets an isolated state dir because the module persists capability
   // rows through the plugin state store across imports.
   const stateDir = mkdtempSync(join(tmpdir(), "openclaw-openrouter-capabilities-"));
   resetPluginStateStoreForTests();
-  process.env.OPENCLAW_STATE_DIR = stateDir;
-  for (const key of [
-    "ALL_PROXY",
-    "all_proxy",
-    "HTTP_PROXY",
-    "http_proxy",
-    "HTTPS_PROXY",
-    "https_proxy",
-  ]) {
-    vi.stubEnv(key, "");
-  }
   try {
-    await run(stateDir);
+    await withEnvAsync(
+      {
+        OPENCLAW_STATE_DIR: stateDir,
+        ALL_PROXY: "",
+        all_proxy: "",
+        HTTP_PROXY: "",
+        http_proxy: "",
+        HTTPS_PROXY: "",
+        https_proxy: "",
+      },
+      async () => {
+        try {
+          await run(stateDir);
+        } finally {
+          resetPluginStateStoreForTests();
+        }
+      },
+    );
   } finally {
-    resetPluginStateStoreForTests();
     rmSync(stateDir, { recursive: true, force: true });
   }
 }
@@ -42,7 +48,6 @@ describe("openrouter-model-capabilities", () => {
   afterEach(() => {
     resetPluginStateStoreForTests();
     vi.unstubAllGlobals();
-    delete process.env.OPENCLAW_STATE_DIR;
   });
 
   it("uses top-level OpenRouter max token fields when top_provider is absent", async () => {