diff --git a/test/parallel/test-zlib-invalid-input.js b/test/parallel/test-zlib-invalid-input.js
index 1b081d919e9068..10c0f3622790d0 100644
--- a/test/parallel/test-zlib-invalid-input.js
+++ b/test/parallel/test-zlib-invalid-input.js
@@ -43,7 +43,7 @@ const unzips = [
 
 nonStringInputs.forEach(common.mustCall((input) => {
   // zlib.gunzip should not throw an error when called with bad input.
-  zlib.gunzip(input, function(err, buffer) {
+  zlib.gunzip(input, (err, buffer) => {
     // zlib.gunzip should pass the error to the callback.
     assert.ok(err);
   });