diff --git a/lib/error-handler.js b/lib/error-handler.js
index cd6ab2ca05..e7f01f6a00 100644
--- a/lib/error-handler.js
+++ b/lib/error-handler.js
@@ -4,7 +4,7 @@ const FJS = require('fast-json-stringify')
 const statusCodes = require('http').STATUS_CODES
 const wrapThenable = require('./wrapThenable')
 const {
-  kReplyHeaders, kReplyNextErrorHandler, kReplyIsRunningOnErrorHook, kReplySent, kReplyHasStatusCode
+  kReplyHeaders, kReplyNextErrorHandler, kReplyIsRunningOnErrorHook, kReplyHasStatusCode
 } = require('./symbols.js')
 
 const {
@@ -122,8 +122,6 @@ function fallbackErrorHandler (error, reply, cb) {
   reply[kReplyHeaders]['content-type'] = 'application/json; charset=utf-8'
   reply[kReplyHeaders]['content-length'] = '' + Buffer.byteLength(payload)
 
-  reply[kReplySent] = true
-
   cb(reply, payload)
 }
 
diff --git a/lib/reply.js b/lib/reply.js
index 0eec1f3f6a..c7a15fc64b 100644
--- a/lib/reply.js
+++ b/lib/reply.js
@@ -15,7 +15,6 @@ const {
   kReplyHasStatusCode,
   kReplyIsRunningOnErrorHook,
   kReplyNextErrorHandler,
-  kReplySent,
   kDisableRequestLogging
 } = require('./symbols.js')
 const { hookRunner, hookIterator, onSendHookRunner } = require('./hooks')
@@ -376,7 +375,6 @@ function preserializeHookEnd (err, request, reply, payload) {
 
 function onSendHook (reply, payload) {
   if (reply.context.onSend !== null) {
-    reply[kReplySent] = true
     onSendHookRunner(
       reply.context.onSend,
       reply.request,
@@ -418,8 +416,6 @@ function onSendEnd (reply, payload) {
   }
 
   if (typeof payload.pipe === 'function') {
-    reply[kReplySent] = true
-
     sendStream(payload, res, reply)
     return
   }
diff --git a/test/stream.test.js b/test/stream.test.js
index 8cd02bbddc..7e38d45f67 100644
--- a/test/stream.test.js
+++ b/test/stream.test.js
@@ -14,7 +14,7 @@ const JSONStream = require('JSONStream')
 const send = require('send')
 const Readable = require('stream').Readable
 const split = require('split2')
-const { kDisableRequestLogging, kReplySent } = require('../lib/symbols.js')
+const { kDisableRequestLogging } = require('../lib/symbols.js')
 
 test('should respond with a stream (success)', t => {
   t.plan(6)
@@ -653,7 +653,7 @@ test('should mark reply as sent before pumping the payload stream into response
   const handleRequest = proxyquire('../lib/handleRequest', {
     './wrapThenable': (thenable, reply) => {
       thenable.then(function (payload) {
-        t.equal(reply[kReplySent], true)
+        t.equal(reply.sent, true)
       })
     }
   })
@@ -670,7 +670,7 @@ test('should mark reply as sent before pumping the payload stream into response
 
   fastify.get('/', async function (req, reply) {
     const stream = fs.createReadStream(__filename, 'utf8')
-    reply.code(200).send(stream)
+    return reply.code(200).send(stream)
   })
 
   fastify.inject({