diff --git a/lib/plugins/analysisstorer/index.js b/lib/plugins/analysisstorer/index.js
index da420d0a1..0d29bc80c 100644
--- a/lib/plugins/analysisstorer/index.js
+++ b/lib/plugins/analysisstorer/index.js
@@ -1,10 +1,5 @@
 'use strict';
 
-const Promise = require('bluebird');
-const fs = require('fs');
-
-Promise.promisifyAll(fs);
-
 function shouldIgnoreMessage(message) {
   return (
     [
diff --git a/lib/plugins/harstorer/index.js b/lib/plugins/harstorer/index.js
index 5cabe7340..394af9344 100644
--- a/lib/plugins/harstorer/index.js
+++ b/lib/plugins/harstorer/index.js
@@ -1,10 +1,5 @@
 'use strict';
 
-const Promise = require('bluebird');
-const fs = require('fs');
-
-Promise.promisifyAll(fs);
-
 module.exports = {
   open(context, options) {
     this.storageManager = context.storageManager;
diff --git a/lib/plugins/html/htmlBuilder.js b/lib/plugins/html/htmlBuilder.js
index d6dd96833..4ac560b8c 100644
--- a/lib/plugins/html/htmlBuilder.js
+++ b/lib/plugins/html/htmlBuilder.js
@@ -1,7 +1,6 @@
 'use strict';
 
-const fs = require('fs'),
-  helpers = require('../../support/helpers'),
+const helpers = require('../../support/helpers'),
   Promise = require('bluebird'),
   path = require('path'),
   merge = require('lodash.merge'),
@@ -16,8 +15,6 @@ const fs = require('fs'),
 const summaryBoxesSetup = require('./setup/summaryBoxes'),
   detailedSetup = require('./setup/detailed');
 
-Promise.promisifyAll(fs);
-
 const TIME_FORMAT = 'YYYY-MM-DD HH:mm:ss';
 
 class HTMLBuilder {
diff --git a/lib/plugins/webpagetest/analyzer.js b/lib/plugins/webpagetest/analyzer.js
index a7bce09be..451dcf4a6 100644
--- a/lib/plugins/webpagetest/analyzer.js
+++ b/lib/plugins/webpagetest/analyzer.js
@@ -1,6 +1,5 @@
 'use strict';
 
-const fs = require('fs');
 const Promise = require('bluebird');
 const log = require('intel').getLogger('sitespeedio.plugin.webpagetest');
 const clone = require('lodash.clonedeep');
@@ -8,7 +7,6 @@ const get = require('lodash.get');
 const WebPageTest = require('webpagetest');
 const WPTAPIError = require('webpagetest/lib/helper').WPTAPIError;
 
-Promise.promisifyAll(fs);
 Promise.promisifyAll(WebPageTest.prototype);
 
 module.exports = {
diff --git a/lib/support/dataCollector.js b/lib/support/dataCollector.js
index a8e7b1d15..0f4c9568c 100644
--- a/lib/support/dataCollector.js
+++ b/lib/support/dataCollector.js
@@ -1,14 +1,10 @@
 'use strict';
 
-const fs = require('fs'),
-  Promise = require('bluebird'),
-  merge = require('lodash.merge'),
+const merge = require('lodash.merge'),
   get = require('lodash.get'),
   reduce = require('lodash.reduce'),
   set = require('lodash.set');
 
-Promise.promisifyAll(fs);
-
 class DataCollector {
   constructor(context) {
     this.resultUrls = context.resultUrls;