diff --git a/lib/Browser.js b/lib/Browser.js
index 1bcabcecc6c..c4115b42c1b 100644
--- a/lib/Browser.js
+++ b/lib/Browser.js
@@ -161,9 +161,15 @@ function waitForChromeResponsive(remoteDebuggingPort, shouldWaitCallback) {
 }
 
 class ProxyStream extends Duplex {
-  _read(size) { }
+  _read() { }
 
+  /**
+   * @param {?} chunk
+   * @param {string} encoding
+   * @param {function()} callback
+   */
   _write(chunk, encoding, callback) {
-    this.push(chunk);
+    this.push(chunk, encoding);
+    callback();
   }
 }