diff --git a/tests/parallel.js b/tests/parallel.js
index 1377833f..2692dac6 100755
--- a/tests/parallel.js
+++ b/tests/parallel.js
@@ -1,10 +1,12 @@
-var sharp = require("../index");
-var fs = require("fs");
-var path = require("path");
-var assert = require("assert");
-var async = require("async");
+/*jslint node: true */
+'use strict';
 
-var inputJpg = path.join(__dirname, "fixtures/2569067123_aca715a2ee_o.jpg"); // http://www.flickr.com/photos/grizdave/2569067123/
+var sharp = require('../index');
+var path = require('path');
+var assert = require('assert');
+var async = require('async');
+
+var inputJpg = path.join(__dirname, 'fixtures/2569067123_aca715a2ee_o.jpg'); // http://www.flickr.com/photos/grizdave/2569067123/
 var width = 720;
 var height = 480;
 
@@ -18,6 +20,7 @@ async.mapSeries([1, 1, 2, 4, 8, 16, 32, 64, 128], function(parallelism, next) {
   var start = new Date().getTime();
   async.times(parallelism,
     function(id, callback) {
+      /*jslint unused: false */
       sharp(inputJpg).resize(width, height).toBuffer(function(err, buffer) {
         buffer = null;
         callback(err, new Date().getTime() - start);
@@ -29,7 +32,7 @@ async.mapSeries([1, 1, 2, 4, 8, 16, 32, 64, 128], function(parallelism, next) {
       var mean = ids.reduce(function(a, b) {
         return a + b;
       }) / ids.length;
-      console.log(parallelism + " parallel calls: fastest=" + ids[0] + "ms slowest=" + ids[ids.length - 1] + "ms mean=" + mean + "ms");
+      console.log(parallelism + ' parallel calls: fastest=' + ids[0] + 'ms slowest=' + ids[ids.length - 1] + 'ms mean=' + mean + 'ms');
       next();
     }
   );
diff --git a/tests/random.js b/tests/random.js
index 4df63bca..b1168d59 100755
--- a/tests/random.js
+++ b/tests/random.js
@@ -1,68 +1,69 @@
-var sharp = require("../index");
-var fs = require("fs");
-var path = require("path");
-var imagemagick = require("imagemagick");
-var gm = require("gm");
-var async = require("async");
-var assert = require("assert");
-var Benchmark = require("benchmark");
-
-var fixturesPath = path.join(__dirname, "fixtures");
-var inputJpg = path.join(fixturesPath, "2569067123_aca715a2ee_o.jpg"); // http://www.flickr.com/photos/grizdave/2569067123/
-var outputJpg = path.join(fixturesPath, "output.jpg");
-
-var min = 320;
-var max = 960;
-
-var randomDimension = function() {
-  return Math.random() * (max - min) + min;
-};
-
-new Benchmark.Suite("random").add("imagemagick", {
-	defer: true,
-	fn: function(deferred) {
-		imagemagick.resize({
-			srcPath: inputJpg,
-			dstPath: outputJpg,
-			quality: 0.8,
-			width: randomDimension(),
-			height: randomDimension()
-		}, function(err) {
-			if (err) {
-				throw err;
-			} else {
-				deferred.resolve();
-			}
-		});
-	}
-}).add("gm", {
-	defer: true,
-	fn: function(deferred) {
-		gm(inputJpg).resize(randomDimension(), randomDimension()).quality(80).toBuffer(function (err, buffer) {
-			if (err) {
-				throw err;
-			} else {
-				assert.notStrictEqual(null, buffer);
-				deferred.resolve();
-			}
-		});
-	}
-}).add("sharp", {
-	defer: true,
-	fn: function(deferred) {
-		sharp(inputJpg).resize(randomDimension(), randomDimension()).toBuffer(function(err, buffer) {
-			if (err) {
-				throw err;
-			} else {
-				assert.notStrictEqual(null, buffer);
-				deferred.resolve();
-			}
-		});
-	}
-}).on("cycle", function(event) {
-  console.log(String(event.target));
-}).on("complete", function() {
-  var winner = this.filter("fastest").pluck("name");
-  assert.strictEqual("sharp", String(winner), "sharp was slower than " + winner);
-	console.dir(sharp.cache());
-}).run();
+/*jslint node: true */
+'use strict';
+
+var sharp = require('../index');
+var path = require('path');
+var imagemagick = require('imagemagick');
+var gm = require('gm');
+var assert = require('assert');
+var Benchmark = require('benchmark');
+
+var fixturesPath = path.join(__dirname, 'fixtures');
+var inputJpg = path.join(fixturesPath, '2569067123_aca715a2ee_o.jpg'); // http://www.flickr.com/photos/grizdave/2569067123/
+var outputJpg = path.join(fixturesPath, 'output.jpg');
+
+var min = 320;
+var max = 960;
+
+var randomDimension = function() {
+  return Math.random() * (max - min) + min;
+};
+
+new Benchmark.Suite('random').add('imagemagick', {
+	defer: true,
+	fn: function(deferred) {
+		imagemagick.resize({
+			srcPath: inputJpg,
+			dstPath: outputJpg,
+			quality: 0.8,
+			width: randomDimension(),
+			height: randomDimension()
+		}, function(err) {
+			if (err) {
+				throw err;
+			} else {
+				deferred.resolve();
+			}
+		});
+	}
+}).add('gm', {
+	defer: true,
+	fn: function(deferred) {
+		gm(inputJpg).resize(randomDimension(), randomDimension()).quality(80).toBuffer(function (err, buffer) {
+			if (err) {
+				throw err;
+			} else {
+				assert.notStrictEqual(null, buffer);
+				deferred.resolve();
+			}
+		});
+	}
+}).add('sharp', {
+	defer: true,
+	fn: function(deferred) {
+		sharp(inputJpg).resize(randomDimension(), randomDimension()).toBuffer(function(err, buffer) {
+			if (err) {
+				throw err;
+			} else {
+				assert.notStrictEqual(null, buffer);
+				deferred.resolve();
+			}
+		});
+	}
+}).on('cycle', function(event) {
+  console.log(String(event.target));
+}).on('complete', function() {
+  var winner = this.filter('fastest').pluck('name');
+  assert.strictEqual('sharp', String(winner), 'sharp was slower than ' + winner);
+	console.dir(sharp.cache());
+}).run();