diff --git a/grunt/config/coverage-hook.js b/grunt/config/coverage-hook.js
index 6fbafc6cd..e8ca16e70 100644
--- a/grunt/config/coverage-hook.js
+++ b/grunt/config/coverage-hook.js
@@ -1,5 +1,6 @@
 'use strict';
 
+// phantomjs's version of `fs`
 var fs = require('fs');
 var COVERAGE_FILE = 'test/coverage/coverage.json';
 
@@ -13,15 +14,18 @@ var saveCoverage = function (page) {
     return;
   }
 
-  var json = JSON.stringify(coverage);
-  console.log(json);
-  console.log('attempting to write to file: ', COVERAGE_FILE);
-  fs.writeFile(COVERAGE_FILE, json, function (err) {
-    if (err) {
-      throw err;
-    }
-    console.error('Coverage File Written: ' + COVERAGE_FILE);
+  // fix paths to files
+  var coverageKeys = Object.keys(coverage);
+  coverageKeys.forEach(function (key) {
+    coverage[key].path = 'src/js/' + coverage[key].path;
   });
+
+  try {
+    fs.write(COVERAGE_FILE, JSON.stringify(coverage), 'w');
+  } catch (e) {
+    console.log('Unable to write to file...');
+    console.error(e);
+  }
 };
 
 module.exports = {
diff --git a/grunt/mocha-runner.js b/grunt/mocha-runner.js
index c7172219f..4186c9bc8 100644
--- a/grunt/mocha-runner.js
+++ b/grunt/mocha-runner.js
@@ -10,8 +10,11 @@ module.exports = function (grunt) {
   var async = require('async');
   var istanbul = require('istanbul');
   var spawn = require('child_process').spawn;
-  var COVERAGE_PREFIX = 'test/coverage/instrument/';
+  var COVERAGE_HTML_OUTPUT_DIR = 'test/coverage/report';
+  var COVERAGE_JSON_OUTPUT_FILE = 'test/coverage/report.json';
+  var INSTRUMENT_PREFIX = 'test/coverage/instrument/';
   var COVERAGE_FILE_NAME = 'test/coverage/mapping.js';
+  var COVERAGE_COLLECTION_FILE = 'test/coverage/coverage.json';
 
   /**
    * Gather all the src paths and prefix them with the coverage path
@@ -23,7 +26,7 @@ module.exports = function (grunt) {
       '!src/js/**/*.jsx.js' // exclude es6 files
     ]).reduce(function (res, p) {
       p = p.replace('src/', '').replace(/\.js$/, '');
-      res[p] = p.replace('js/', COVERAGE_PREFIX);
+      res[p] = p.replace('js/', INSTRUMENT_PREFIX);
       return res;
     }, {});
 
@@ -34,7 +37,6 @@ module.exports = function (grunt) {
 
   grunt.registerMultiTask('mocha-runner', 'find and run tests', function () {
     var done = this.async();
-    var collector = new istanbul.Collector();
 
     // create the options object
     var options = this.options({
@@ -123,11 +125,38 @@ module.exports = function (grunt) {
 
     // spawn a new test for each url, output total failures
     async.eachSeries(options.urls, spawnTest, function () {
+
+      // get the coverage object from the collection file generated
+      var coverageObject = grunt.file.readJSON(COVERAGE_COLLECTION_FILE);
+      var collector = new istanbul.Collector();
+      collector.add(coverageObject);
+
+      // Generate a quick summary to be shown in the output
+      var finalCoverage = collector.getFinalCoverage();
+      var summary = istanbul.utils.summarizeCoverage(finalCoverage);
+
+      // Output the percentages of the coverage
+      grunt.log.ok('Coverage:');
+      grunt.log.ok('-  Lines: ' + summary.lines.pct + '%');
+      grunt.log.ok('-  Statements: ' + summary.statements.pct + '%');
+      grunt.log.ok('-  Functions: ' + summary.functions.pct + '%');
+      grunt.log.ok('-  Branches: ' + summary.branches.pct + '%');
+
+      // write reports
+      istanbul.Report.create('html', {
+        dir: COVERAGE_HTML_OUTPUT_DIR
+      }).writeReport(collector, true);
+
+      istanbul.Report.create('json', {
+        dir: COVERAGE_JSON_OUTPUT_FILE
+      }).writeReport(collector, true);
+
       if (errors > 0) {
         grunt.fail.warn(errors + ' tests failed :(\n');
       } else if (errors === 0) {
         grunt.log.writeln(errors + ' tests failed :)\n');
       }
+
       done();
     });
   });