diff --git a/tasks/build-ext.js b/tasks/build-ext.js
index f64923b3e9..a880c75fb2 100644
--- a/tasks/build-ext.js
+++ b/tasks/build-ext.js
@@ -66,8 +66,7 @@ function wrapModule(mod, callback) {
   };
 
   if (mod.browserify) {
-    var b = browserify(mod.main, {standalone: mod.name}).
-        bundle(function(err, buf) {
+    browserify(mod.main, {standalone: mod.name}).bundle(function(err, buf) {
       if (err) {
         callback(err);
         return;
diff --git a/tasks/generate-exports.js b/tasks/generate-exports.js
index 3394e670f4..38e5eea736 100644
--- a/tasks/generate-exports.js
+++ b/tasks/generate-exports.js
@@ -1,5 +1,4 @@
 var fs = require('fs');
-var path = require('path');
 
 var async = require('async');
 var fse = require('fs-extra');
diff --git a/tasks/generate-externs.js b/tasks/generate-externs.js
index c0c9d20559..d02ef04478 100644
--- a/tasks/generate-externs.js
+++ b/tasks/generate-externs.js
@@ -1,6 +1,3 @@
-var fs = require('fs');
-var path = require('path');
-
 var async = require('async');
 var fse = require('fs-extra');
 var nomnom = require('nomnom');
diff --git a/tasks/install.js b/tasks/install.js
index d3850dc968..68d8465a43 100644
--- a/tasks/install.js
+++ b/tasks/install.js
@@ -1,5 +1,3 @@
-var async = require('async');
-
 var buildExt = require('./build-ext');
 
 buildExt(function(err) {
diff --git a/tasks/serve-lib.js b/tasks/serve-lib.js
index ed55becb5b..8a6f9d721e 100644
--- a/tasks/serve-lib.js
+++ b/tasks/serve-lib.js
@@ -4,7 +4,6 @@
  */
 
 var path = require('path');
-var url = require('url');
 
 var closure = require('closure-util');
 var nomnom = require('nomnom');
diff --git a/tasks/test-rendering.js b/tasks/test-rendering.js
index 9df2f2bc1b..fdb29c7290 100644
--- a/tasks/test-rendering.js
+++ b/tasks/test-rendering.js
@@ -3,7 +3,6 @@
  * and Closure Library and runs rendering tests in SlimerJS.
  */
 
-var fs = require('fs');
 var path = require('path');
 var spawn = require('child_process').spawn;