diff --git a/mozmill/mozmill/__init__.py b/mozmill/mozmill/__init__.py
index 9a58cfa9..0cdfd52b 100644
--- a/mozmill/mozmill/__init__.py
+++ b/mozmill/mozmill/__init__.py
@@ -425,6 +425,7 @@ def get_appinfo(self, bridge):
         try:
             mozmill = jsbridge.JSObject(bridge, js_module_mozmill)
             app_info = json.loads(mozmill.getApplicationDetails())
+
         except JSBridgeDisconnectError:
             # We don't have to call report_disconnect here because
             # start_runner() will handle this exception
diff --git a/mozmill/mozmill/extension/resource/driver/mozmill.js b/mozmill/mozmill/extension/resource/driver/mozmill.js
index c971808e..fd6de07c 100644
--- a/mozmill/mozmill/extension/resource/driver/mozmill.js
+++ b/mozmill/mozmill/extension/resource/driver/mozmill.js
@@ -93,36 +93,11 @@ function getStartupInfo() {
 }
 
 // keep list of installed addons to send to jsbridge for test run report
-var addons = "null"; // this will be JSON parsed
-if (typeof AddonManager != "undefined") {
-  AddonManager.getAllAddons(function (addonList) {
-      var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
-                      .createInstance(Ci.nsIScriptableUnicodeConverter);
-      converter.charset = 'utf-8';
-
-      function replacer(key, value) {
-        if (typeof(value) == "string") {
-          try {
-            return converter.ConvertToUnicode(value);
-          } catch (e) {
-            var newstring = '';
-            for (var i=0; i < value.length; i++) {
-              replacement = '';
-              if ((32 <= value.charCodeAt(i)) && (value.charCodeAt(i) < 127)) {
-                // eliminate non-convertable characters;
-                newstring += value.charAt(i);
-              } else {
-                newstring += replacement;
-              }
-            }
-            return newstring;
-          }
-        }
-
-        return value;
-      }
+var addons = "null";
 
-      addons = converter.ConvertToUnicode(JSON.stringify(addonList, replacer));
+if (typeof AddonManager != "undefined") {
+  AddonManager.getAllAddons(function (aAddonList) {
+    addons = aAddonList;
   });
 }
 
@@ -149,7 +124,7 @@ function getApplicationDetails() {
     startupinfo: getStartupInfo()
   };
 
-  return JSON.stringify(details);
+  return utils.convertToUnicode(JSON.stringify(details));
 }
 
 function cleanQuit () {
diff --git a/mozmill/mozmill/extension/resource/stdlib/utils.js b/mozmill/mozmill/extension/resource/stdlib/utils.js
index 85c9ff48..4a630302 100644
--- a/mozmill/mozmill/extension/resource/stdlib/utils.js
+++ b/mozmill/mozmill/extension/resource/stdlib/utils.js
@@ -2,7 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-var EXPORTED_SYMBOLS = ["Copy", "getChromeWindow", "getWindows",
+var EXPORTED_SYMBOLS = ["convertToUnicode", "Copy", "getChromeWindow", "getWindows",
                         "getWindowByTitle", "getWindowByType", "getWindowId",
                         "getMethodInWindows", "getPreference", "setPreference",
                         "sleep", "assert", "unwrapNode", "TimeoutError", "waitFor",
@@ -22,6 +22,45 @@ var hwindow = Cc["@mozilla.org/appshell/appShellService;1"]
 
 var uuidgen = Cc["@mozilla.org/uuid-generator;1"].getService(Ci.nsIUUIDGenerator);
 
+
+/**
+ * Converts the text from the source charset to Unicode.
+ * Non-convertable characters will be replaced by a question mark.
+ *
+ * @param {String} aText Text to convert
+ * @return {String} Unicode string
+ */
+function convertToUnicode(aText) {
+  var converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]
+                  .createInstance(Ci.nsIScriptableUnicodeConverter);
+  converter.charset = 'utf-8';
+
+  function replacer(aKey, aValue) {
+    if (typeof(aValue) === "string") {
+      try {
+        return converter.ConvertToUnicode(aValue);
+      } catch (e) {
+        var newstring = '';
+        for (var i = 0; i < aValue.length; i++) {
+          replacement = '?';
+          if ((32 <= aValue.charCodeAt(i)) && (aValue.charCodeAt(i) < 127)) {
+            // eliminate non-convertable characters;
+            newstring += aValue.charAt(i);
+          } else {
+            newstring += replacement;
+          }
+        }
+
+        return newstring;
+      }
+    }
+
+    return aValue;
+  }
+
+  return converter.ConvertToUnicode(aText, replacer);
+}
+
 function Copy (obj) {
   for (var n in obj) {
     this[n] = obj[n];
diff --git a/mutt/mutt/tests/python/test_appinfo.py b/mutt/mutt/tests/python/test_appinfo.py
new file mode 100644
index 00000000..cf1031a8
--- /dev/null
+++ b/mutt/mutt/tests/python/test_appinfo.py
@@ -0,0 +1,40 @@
+import os
+import unittest
+import tempfile
+
+import mozmill
+
+
+class ModuleTest(unittest.TestCase):
+    def make_test(self):
+        """make an example test to run"""
+        test = """var test_something = function() {}"""
+        fd, path = tempfile.mkstemp()
+        os.write(fd, test)
+        os.close(fd)
+
+        return path
+
+    def test_appinfo(self):
+        tests = [{'path': self.make_test()}]
+
+        m = mozmill.MozMill.create()
+        m.run(tests)
+        results = m.finish()
+
+        self.assertRegexpMatches(results.appinfo.get('application_id'), "^{.*}$")
+        self.assertIsInstance(results.appinfo.get('application_name'), unicode)
+        self.assertIsInstance(results.appinfo.get('application_version'), unicode)
+        self.assertIsInstance(results.appinfo.get('application_locale'), unicode)
+        self.assertRegexpMatches(results.appinfo.get('platform_buildid'), "^[0-9]*$")
+        self.assertIsInstance(results.appinfo.get('application_version'), unicode)
+        self.assertIsInstance(results.appinfo.get('startupinfo'), dict)
+
+        addons = results.appinfo.get('addons')
+        self.assertIsInstance(addons, list)
+        self.assertGreaterEqual(len(addons), 2,
+                                "At least Mozmill and JSBridge should be installed.")
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/mutt/mutt/tests/python/tests.ini b/mutt/mutt/tests/python/tests.ini
index 2518505e..714ed312 100644
--- a/mutt/mutt/tests/python/tests.ini
+++ b/mutt/mutt/tests/python/tests.ini
@@ -4,6 +4,7 @@ type = python
 [include:cli/tests.ini]
 
 [expectstacktest.py]
+[test_appinfo.py]
 [test_bug690154.py]
 [test_endTest.py]
 [test_loggerListener.py]