--- a/devtools/client/netmonitor/test/browser_net_filter-flags.js
+++ b/devtools/client/netmonitor/test/browser_net_filter-flags.js
@@ -1,13 +1,15 @@
 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 
 "use strict";
 
+requestLongerTimeout(2);
+
 /**
  * Test different text filtering flags
  */
 const REQUESTS = [
   { url: "sjs_content-type-test-server.sjs?fmt=html&res=undefined&text=Sample" },
   { url: "sjs_content-type-test-server.sjs?fmt=html&res=undefined&text=Sample" +
          "&cookies=1" },
   { url: "sjs_content-type-test-server.sjs?fmt=css&text=sample" },