diff -r 000000000000 -r 6474c204b198 browser/devtools/scratchpad/test/browser_scratchpad_open_error_console.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_open_error_console.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,37 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html;charset=utf8,test Scratchpad." +
+                     "openErrorConsole()";
+}
+
+function runTests()
+{
+  Services.obs.addObserver(function observer(aSubject) {
+    Services.obs.removeObserver(observer, "web-console-created");
+    aSubject.QueryInterface(Ci.nsISupportsString);
+
+    let hud = HUDService.getBrowserConsole();
+    ok(hud, "browser console is open");
+    is(aSubject.data, hud.hudId, "notification hudId is correct");
+
+    HUDService.toggleBrowserConsole().then(finish);
+  }, "web-console-created", false);
+
+  let hud = HUDService.getBrowserConsole();
+  ok(!hud, "browser console is not open");
+  info("wait for the browser console to open from Scratchpad");
+
+  gScratchpadWindow.Scratchpad.openErrorConsole();
+}