diff --git a/package.json b/package.json
index bd5d7e4c1..a0f25e9c5 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "@types/node": "^25.0.3",
     "airtap": "5.0.0",
     "bole": "^5.0.5",
-    "borp": "^0.21.0",
+    "borp": "^1.0.0",
     "bunyan": "^1.8.14",
     "debug": "^4.3.4",
     "docsify-cli": "^4.4.4",
diff --git a/test/transport/core.transpiled.test.ts b/test/transport/core.transpiled.test.mjs
similarity index 91%
rename from test/transport/core.transpiled.test.ts
rename to test/transport/core.transpiled.test.mjs
index 804d29b81..9b42414fa 100644
--- a/test/transport/core.transpiled.test.ts
+++ b/test/transport/core.transpiled.test.mjs
@@ -1,12 +1,16 @@
 import test from 'node:test'
 import assert from 'node:assert'
 import * as os from 'node:os'
-import { join } from 'node:path'
+import { join, dirname } from 'node:path'
 import fs from 'node:fs'
 import * as url from 'node:url'
 
-import { watchFileCreated } from '../helper'
-import pino from '../../'
+import { fileURLToPath } from 'node:url'
+import { watchFileCreated } from '../helper.js'
+import pino from '../../pino.js'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = dirname(__filename)
 
 const readFile = fs.promises.readFile
 
@@ -14,7 +18,7 @@ const { pid } = process
 const hostname = os.hostname()
 
 // A subset of the test from core.test.js, we don't need all of them to check for compatibility
-function runTests (esVersion: string): void {
+function runTests (esVersion) {
   test(`(ts -> ${esVersion}) pino.transport with file`, async (t) => {
     const destination = join(
       os.tmpdir(),