diff --git a/test/parallel/test-fs-readfile-pipe-large.js b/test/parallel/test-fs-readfile-pipe-large.js
index 4d278ee0f22093..17831f81f6df83 100644
--- a/test/parallel/test-fs-readfile-pipe-large.js
+++ b/test/parallel/test-fs-readfile-pipe-large.js
@@ -29,8 +29,16 @@ const node = JSON.stringify(process.execPath);
 const cmd = `cat ${filename} | ${node} ${f} child`;
 exec(cmd, { maxBuffer: 1000000 }, function(err, stdout, stderr) {
   assert.ifError(err);
-  assert.strictEqual(stdout, dataExpected, 'it reads the file and outputs it');
-  assert.strictEqual(stderr, '', 'it does not write to stderr');
+  assert.strictEqual(
+    stdout,
+    dataExpected,
+    `expect it reads the file and outputs 999999 'a' but got : ${stdout}`
+  );
+  assert.strictEqual(
+    stderr,
+    '',
+    `expect that it does not write to stderr, but got : ${stderr}`
+  );
   console.log('ok');
 });