diff --git a/lib/net.js b/lib/net.js
index 8952734f9d9a10..f1dcff22463c54 100644
--- a/lib/net.js
+++ b/lib/net.js
@@ -553,7 +553,7 @@ ObjectDefineProperty(Socket.prototype, 'readyState', {
 ObjectDefineProperty(Socket.prototype, 'bufferSize', {
   get: function() {
     if (this._handle) {
-      return this[kLastWriteQueueSize] + this.writableLength;
+      return this.writableLength;
     }
   }
 });
diff --git a/test/parallel/test-tls-buffersize.js b/test/parallel/test-tls-buffersize.js
index c94b95d7b32d31..eadd4cb1e40c9e 100644
--- a/test/parallel/test-tls-buffersize.js
+++ b/test/parallel/test-tls-buffersize.js
@@ -31,7 +31,7 @@ server.listen(0, common.mustCall(() => {
 
     for (let i = 1; i < iter; i++) {
       client.write('a');
-      assert.strictEqual(client.bufferSize, i + 1);
+      assert.strictEqual(client.bufferSize, i);
     }
 
     client.on('finish', common.mustCall(() => {
diff --git a/test/parallel/test-tls-streamwrap-buffersize.js b/test/parallel/test-tls-streamwrap-buffersize.js
index f65a3d6e76b9d8..13eb1ce1d85da8 100644
--- a/test/parallel/test-tls-streamwrap-buffersize.js
+++ b/test/parallel/test-tls-streamwrap-buffersize.js
@@ -56,7 +56,7 @@ const net = require('net');
 
         for (let i = 1; i < iter; i++) {
           client.write('a');
-          assert.strictEqual(client.bufferSize, i + 1);
+          assert.strictEqual(client.bufferSize, i);
         }
 
         // It seems that tlsSockets created from sockets of `Duplex` emit no