diff --git a/test/harness.ts b/test/harness.ts
index 95a84519d3..b8f68d2fa9 100644
--- a/test/harness.ts
+++ b/test/harness.ts
@@ -1041,7 +1041,7 @@ export function mergeWindowEnvs(envs: Record<string, string | undefined>[]) {
 }
 
 export function tmpdirSync(pattern: string = "bun.test.") {
-  return fs.mkdtempSync(join(fs.realpathSync(os.tmpdir()), pattern));
+  return fs.mkdtempSync(join(fs.realpathSync.native(os.tmpdir()), pattern));
 }
 
 export async function runBunInstall(