diff --git a/accessible/tests/mochitest/events/test_textattrchange.html b/accessible/tests/mochitest/events/test_textattrchange.html
index a69a8df15e08..e990f3f9d1d8 100644
--- a/accessible/tests/mochitest/events/test_textattrchange.html
+++ b/accessible/tests/mochitest/events/test_textattrchange.html
@@ -29,7 +29,7 @@
 
     Components.utils.import("resource://gre/modules/InlineSpellChecker.jsm");
 
-    function spelledTextInvoker(aID)
+    function spelledTextInvoker(aID, aText, aTests)
     {
       this.DOMNode = getNode(aID);
 
@@ -46,7 +46,7 @@
         //var spellchecker = editor.getInlineSpellChecker(true);
         //spellchecker.enableRealTimeSpell = true;
 
-        this.DOMNode.value = "valid text inalid tixt";
+        this.DOMNode.value = aText;
       }
 
       this.finalCheck = function spelledTextInvoker_finalCheck()
@@ -61,10 +61,11 @@
           "invalid": "spelling"
         };
 
-        testTextAttrs(aID, 0, attrs, defAttrs, 0, 11);
-        testTextAttrs(aID, 11, misspelledAttrs, defAttrs, 11, 17);
-        testTextAttrs(aID, 17, attrs, defAttrs, 17, 18);
-        testTextAttrs(aID, 18, misspelledAttrs, defAttrs, 18, 22);
+        for (var i = 0; i < aTests.length; i++) {
+          testTextAttrs(aID, aTests[i].start,
+                        aTests[i].misspelled ? misspelledAttrs : attrs,
+                        defAttrs, aTests[i].start, aTests[i].end);
+        }
       }
 
       this.getID = function spelledTextInvoker_getID()
@@ -87,7 +88,32 @@
 
       gQueue = new eventQueue();
       gQueue.push(new synthFocus("input"));
-      gQueue.push(new spelledTextInvoker("input"));
+
+      var tests = [
+        { misspelled: false, start: 0, end: 11},
+        { misspelled: true, start: 11, end: 17},
+        { misspelled: false, start: 17, end: 18},
+        { misspelled: true, start: 18, end: 22}
+      ];
+      gQueue.push(new spelledTextInvoker("input", "valid text inalid tixt",
+                                         tests));
+
+      tests = [
+        { misspelled: false, start: 0, end: 4}
+      ];
+      gQueue.push(new spelledTextInvoker("input", "that", tests));
+
+      tests = [
+        { misspelled: true, start: 0, end: 4}
+      ];
+      gQueue.push(new spelledTextInvoker("input", "taht", tests));
+
+      tests = [
+        { misspelled: true, start: 0, end: 4},
+        { misspelled: false, start: 4, end: 8}
+      ];
+      gQueue.push(new spelledTextInvoker("input", "taht cat", tests));
+
       gQueue.invoke(); // Will call SimpleTest.finish();
     }
 
@@ -103,6 +129,11 @@
      title="Implement text attributes">
     Mozilla Bug 345759
   </a>
+  <a target="_blank"
+     href="https://bugzilla.mozilla.org/show_bug.cgi?id=770564"
+     title="improve performance of getting spelling text attribute"
+    Mozilla Bug 770564
+  </a>
   <p id="display"></p>
   <div id="content" style="display: none"></div>
   <pre id="test">