diff --git a/lib/tls.js b/lib/tls.js
index f13c5c1c8601c2..a77f9a674dbdcf 100644
--- a/lib/tls.js
+++ b/lib/tls.js
@@ -45,8 +45,6 @@ const _tls_wrap = require('_tls_wrap');
 exports.CLIENT_RENEG_LIMIT = 3;
 exports.CLIENT_RENEG_WINDOW = 600;
 
-exports.SLAB_BUFFER_SIZE = 10 * 1024 * 1024;
-
 exports.DEFAULT_CIPHERS =
     process.binding('constants').crypto.defaultCipherList;
 
diff --git a/test/parallel/test-https-req-split.js b/test/parallel/test-https-req-split.js
deleted file mode 100644
index 05fc85fc07b781..00000000000000
--- a/test/parallel/test-https-req-split.js
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright Joyent, Inc. and other Node contributors.
-//
-// Permission is hereby granted, free of charge, to any person obtaining a
-// copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to permit
-// persons to whom the Software is furnished to do so, subject to the
-// following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
-// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
-// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
-// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
-// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
-// USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-'use strict';
-const common = require('../common');
-const fixtures = require('../common/fixtures');
-if (!common.hasCrypto)
-  common.skip('missing crypto');
-
-// disable strict server certificate validation by the client
-process.env.NODE_TLS_REJECT_UNAUTHORIZED = '0';
-
-const https = require('https');
-
-const tls = require('tls');
-
-const options = {
-  key: fixtures.readKey('agent1-key.pem'),
-  cert: fixtures.readKey('agent1-cert.pem')
-};
-
-// Force splitting incoming data
-tls.SLAB_BUFFER_SIZE = 1;
-
-const server = https.createServer(options);
-server.on('upgrade', common.mustCall(function(req, socket, upgrade) {
-  socket.on('data', function(data) {
-    throw new Error(`Unexpected data: ${data}`);
-  });
-  socket.end('HTTP/1.1 200 Ok\r\n\r\n');
-}));
-
-server.listen(0, function() {
-  const req = https.request({
-    host: '127.0.0.1',
-    port: this.address().port,
-    agent: false,
-    headers: {
-      Connection: 'Upgrade',
-      Upgrade: 'Websocket'
-    }
-  }, function() {
-    req.socket.destroy();
-    server.close();
-  });
-
-  req.end();
-});