diff --git a/test.js b/test.js
index 5f7f6cd..493ef49 100644
--- a/test.js
+++ b/test.js
@@ -2,7 +2,7 @@ import { readFileSync } from 'fs'
 import test from 'tape'
 
 test('babel-tape-runner', t => {
-  let file = readFileSync(__filename, 'utf8')
+  const file = readFileSync(__filename, 'utf8')
   t.ok(/hello/gim.flags, 'gim')
   t.ok(/^import/.test(file))
   t.end()