diff --git a/test/scripts/bench-cli-startup.test.ts b/test/scripts/bench-cli-startup.test.ts
index 2b99e9485db..5b02033a23c 100644
--- a/test/scripts/bench-cli-startup.test.ts
+++ b/test/scripts/bench-cli-startup.test.ts
@@ -4,31 +4,9 @@ import { existsSync, readFileSync, writeFileSync } from "node:fs";
 import { join } from "node:path";
 import { describe, expect, it } from "vitest";
 import { testing } from "../../scripts/bench-cli-startup.ts";
+import { withEnv } from "../../src/test-utils/env.js";
 import { createTempDirTracker } from "../helpers/temp-dir.js";
 
-function withEnv<T>(env: Record<string, string | undefined>, callback: () => T): T {
-  const previous = new Map<string, string | undefined>();
-  for (const [key, value] of Object.entries(env)) {
-    previous.set(key, process.env[key]);
-    if (value === undefined) {
-      delete process.env[key];
-    } else {
-      process.env[key] = value;
-    }
-  }
-  try {
-    return callback();
-  } finally {
-    for (const [key, value] of previous) {
-      if (value === undefined) {
-        delete process.env[key];
-      } else {
-        process.env[key] = value;
-      }
-    }
-  }
-}
-
 function isProcessAlive(pid: number): boolean {
   try {
     process.kill(pid, 0);