--- a/toolkit/mozapps/extensions/XPIProvider.jsm
+++ b/toolkit/mozapps/extensions/XPIProvider.jsm
@@ -3281,17 +3281,17 @@ AddonInstall.prototype = {
   loadManifest: function AI_loadManifest() {
     let zipreader = Cc["@mozilla.org/libjar/zip-reader;1"].
                     createInstance(Ci.nsIZipReader);
     zipreader.open(this.file);
 
     try {
       let principal = zipreader.getCertificatePrincipal(null);
       if (principal && principal.hasCertificate) {
-        LOG("Verifying XPI signiture");
+        LOG("Verifying XPI signature");
         if (verifyZipSigning(zipreader, principal)) {
           let x509 = principal.certificate;
           if (x509 instanceof Ci.nsIX509Cert)
             this.certificate = x509;
           if (this.certificate && this.certificate.commonName.length > 0)
             this.certName = this.certificate.commonName;
           else
             this.certName = principal.prettyName;

--- a/toolkit/mozapps/extensions/test/xpinstall/browser_signed_untrusted.js
+++ b/toolkit/mozapps/extensions/test/xpinstall/browser_signed_untrusted.js
@@ -1,35 +1,41 @@
 // ----------------------------------------------------------------------------
 // Tests installing an add-on signed by an untrusted certificate through an
 // InstallTrigger call in web content.
 function test() {
   Harness.installConfirmCallback = confirm_install;
-  Harness.installEndedCallback = download_failed;
+  Harness.installEndedCallback = install_ended;
   Harness.installsCompletedCallback = finish_test;
   Harness.setup();
 
   var pm = Services.perms;
   pm.add(makeURI("http://example.com/"), "install", pm.ALLOW_ACTION);
 
   var triggers = encodeURIComponent(JSON.stringify({
     "Untrusted Signed XPI": TESTROOT + "signed-untrusted.xpi"
   }));
   gBrowser.selectedTab = gBrowser.addTab();
   gBrowser.loadURI(TESTROOT + "installtrigger.html?" + triggers);
 }
 
 function confirm_install(window) {
-  ok(false, "Should not offer to install");
+  items = window.document.getElementById("itemList").childNodes;
+  is(items.length, 1, "Should only be 1 item listed in the confirmation dialog");
+  is(items[0].name, "Signed XPI Test", "Should have had the filename for the item name");
+  is(items[0].url, TESTROOT + "signed-untrusted.xpi", "Should have listed the correct url for the item");
+  is(items[0].icon, "", "Should have listed no icon for the item");
+  is(items[0].signed, "false", "Should have listed the item as unsigned");
+  return true;
 }
 
-function download_failed(install, status) {
-  is(status, AddonManager.ERROR_CORRUPTFILE, "Should have seen a corrupt file");
+function install_ended(install, addon) {
+  install.cancel();
 }
 
 function finish_test(count) {
-  is(count, 0, "No add-ons should have been installed");
+  is(count, 1, "1 Add-on should have been successfully installed");
   Services.perms.remove("example.com", "install");
 
   gBrowser.removeCurrentTab();
   Harness.finish();
 }
 // ----------------------------------------------------------------------------