diff --git a/lib/websocket.js b/lib/websocket.js
index 4391c73ab..2bcfcf738 100644
--- a/lib/websocket.js
+++ b/lib/websocket.js
@@ -643,7 +643,6 @@ function initAsClient(websocket, address, protocols, options) {
     followRedirects: false,
     maxRedirects: 10,
     ...options,
-    createConnection: undefined,
     socketPath: undefined,
     hostname: undefined,
     protocol: undefined,
@@ -706,7 +705,7 @@ function initAsClient(websocket, address, protocols, options) {
   const protocolSet = new Set();
   let perMessageDeflate;
 
-  opts.createConnection = isSecure ? tlsConnect : netConnect;
+  opts.createConnection = opts.createConnection ?? (isSecure ? tlsConnect : netConnect);
   opts.defaultPort = opts.defaultPort || defaultPort;
   opts.port = parsedUrl.port || defaultPort;
   opts.host = parsedUrl.hostname.startsWith('[')