--- a/dom/animation/test/chrome/test_animation_performance_warning.html
+++ b/dom/animation/test/chrome/test_animation_performance_warning.html
@@ -24,16 +24,18 @@
   target="_blank">Mozilla Bug 1196114</a>
 <div id="log"></div>
 <script>
 'use strict';
 
 // This is used for obtaining localized strings.
 var gStringBundle;
 
+W3CTest.runner.requestLongerTimeout(2);
+
 SpecialPowers.pushPrefEnv({ "set": [
                             ["general.useragent.locale", "en-US"],
                             // Need to set devPixelsPerPx explicitly to gain
                             // consistent pixel values in warning messages
                             // regardless of platform DPIs.
                             ["layout.css.devPixelsPerPx", 1],
                           ] },
                           start);