diff --git a/lib/collector.js b/lib/collector.js
index e282aca2b..873183f72 100644
--- a/lib/collector.js
+++ b/lib/collector.js
@@ -78,6 +78,12 @@ Collector.prototype.createAggregates = function() {
   return aggregates;
 };
 
+Collector.prototype.clear = function() {
+  collectors.forEach(function(c) {
+  c.clear();
+  });
+};
+
 Collector.prototype.createCollections = function() {
   var collections = {};
 
diff --git a/lib/collectors/assets.js b/lib/collectors/assets.js
index a43582a6c..5de06a67b 100644
--- a/lib/collectors/assets.js
+++ b/lib/collectors/assets.js
@@ -43,3 +43,7 @@ exports.generateResults = function() {
         list: values
     };
 };
+
+exports.clear = function() {
+  assets = {};
+};
diff --git a/lib/collectors/pages.js b/lib/collectors/pages.js
index a2434b2b5..0ac401516 100644
--- a/lib/collectors/pages.js
+++ b/lib/collectors/pages.js
@@ -235,3 +235,7 @@ exports.generateResults = function() {
     list: pages
   };
 };
+
+exports.clear = function() {
+  pages = [];
+};
diff --git a/lib/runner.js b/lib/runner.js
index 3d8e4aaf9..6bad77d97 100644
--- a/lib/runner.js
+++ b/lib/runner.js
@@ -109,6 +109,7 @@ Runner.prototype._setupConfigurationForSite = function(args, cb) {
     "yyyy-mm-dd-HH-MM-ss"), config.urlObject.hostname);
   // setup the directories needed
   var dataDir = path.join(config.run.absResultDir, config.dataDir);
+
   fs.mkdirs(dataDir, function(err) {
     if (err) {
       log.log('error', "Couldn't create the data dir:" + dataDir + ' ' + err);
@@ -333,6 +334,14 @@ Runner.prototype._createOutput = function (downloadErrors, analysisErrors, callB
       }
     },
     function(err, results) {
+
+      // TODO this can be cleaner
+      // We clear the number of pages tested and
+      // the collected data, so it is ready for next run
+      // used when testing multiple sites      
+      self.htmlRenderer.numberOfAnalyzedPages = 0;
+      self.collector.clear();
+
       if (!err)
         log.log('info', "Wrote results to " + config.run.absResultDir);
       callBack();