Index: test/filterListener.js
===================================================================
--- a/test/filterListener.js
+++ b/test/filterListener.js
@@ -59,19 +59,19 @@
   callback();
 };
 
 function checkKnownFilters(test, text, expected)
 {
   let result = {};
   for (let type of ["blacklist", "whitelist"])
   {
-    let matcher = defaultMatcher[type];
+    let matcher = defaultMatcher["_" + type];
     let filters = [];
-    for (let [keyword, set] of matcher.filterByKeyword)
+    for (let [keyword, set] of matcher._filterByKeyword)
     {
       for (let filter of set)
       {
         test.equal(matcher.findKeyword(filter), keyword,
                    "Keyword of filter " + filter.text);
         filters.push(filter.text);
       }
     }