--- a/browser/base/content/test/static/browser_parsable_css.js
+++ b/browser/base/content/test/static/browser_parsable_css.js
@@ -83,25 +83,16 @@ if (!Services.prefs.getBoolPref("full-sc
 let allowedImageReferences = [
   // Bug 1302691
   {file: "chrome://devtools/skin/images/dock-bottom-minimize@2x.png",
    from: "chrome://devtools/skin/toolbox.css",
    isFromDevTools: true},
   {file: "chrome://devtools/skin/images/dock-bottom-maximize@2x.png",
    from: "chrome://devtools/skin/toolbox.css",
    isFromDevTools: true},
-  // Bug 1405539
-  {file: "chrome://global/skin/arrow/panelarrow-vertical@2x.png",
-   from: "resource://activity-stream/css/activity-stream.css",
-   isFromDevTools: false,
-   platforms: ["linux", "win"]},
-  {file: "chrome://global/skin/arrow/panelarrow-vertical-themed.svg",
-   from: "resource://activity-stream/css/activity-stream.css",
-   isFromDevTools: false,
-   platforms: ["macosx"]},
 ];
 
 // Add suffix to stylesheets' URI so that we always load them here and
 // have them parsed. Add a random number so that even if we run this
 // test multiple times, it would be unlikely to affect each other.
 const kPathSuffix = "?always-parse-css-" + Math.random();
 
 /**