diff --git a/test/main.js b/test/main.js
index 776593f..df4f8c6 100644
--- a/test/main.js
+++ b/test/main.js
@@ -1,27 +1,31 @@
-var should = require("should");
-var gutil = require("gulp-util");
-var path = require("path");
-var fs = require("fs");
-var sass = require("../index");
+'use strict';
+
+var should = require('should');
+var gutil = require('gulp-util');
+var path = require('path');
+var fs = require('fs');
+var sass = require('../index');
 var assert = require('assert');
 
-function createVinyl(filename, contents) {
-  var base = path.join(__dirname, "scss");
+var createVinyl = function createVinyl(filename, contents) {
+  var base = path.join(__dirname, 'scss');
   var filePath = path.join(base, filename);
 
   return new gutil.File({
-    cwd: __dirname,
-    base: base,
-    path: filePath,
-    contents: contents || fs.readFileSync(filePath)
+    'cwd': __dirname,
+    'base': base,
+    'path': filePath,
+    'contents': contents || fs.readFileSync(filePath)
   });
-}
+};
 
-describe("gulp-sass", function() {
-  it("should pass file when it isNull()", function(done) {
+describe('gulp-sass', function() {
+  it('should pass file when it isNull()', function(done) {
     var stream = sass();
     var emptyFile = {
-      isNull: function () { return true; }
+      'isNull': function () {
+        return true;
+      }
     };
     stream.on('data', function(data) {
       data.should.equal(emptyFile);
@@ -33,8 +37,12 @@ describe("gulp-sass", function() {
   it('should emit error when file isStream()', function (done) {
     var stream = sass();
     var streamFile = {
-      isNull: function () { return false; },
-      isStream: function () { return true; }
+      'isNull': function () {
+        return false;
+      },
+      'isStream': function () {
+        return true;
+      }
     };
     stream.on('error', function(err) {
       err.message.should.equal('Streaming not supported');
@@ -43,10 +51,10 @@ describe("gulp-sass", function() {
     stream.write(streamFile);
   });
 
-  it("should compile a single sass file", function(done) {
-    var sassFile = createVinyl("mixins.scss");
+  it('should compile a single sass file', function(done) {
+    var sassFile = createVinyl('mixins.scss');
     var stream = sass();
-    stream.on("data", function(cssFile) {
+    stream.on('data', function(cssFile) {
       should.exist(cssFile);
       should.exist(cssFile.path);
       should.exist(cssFile.relative);
@@ -59,21 +67,21 @@ describe("gulp-sass", function() {
     stream.write(sassFile);
   });
 
-  it("should compile multiple sass files", function(done) {
+  it('should compile multiple sass files', function(done) {
     var files = [
       createVinyl('mixins.scss'),
       createVinyl('variables.scss')
     ];
     var stream = sass();
     var mustSee = files.length;
+    var expectedPath = 'expected/mixins.css';
 
-    stream.on("data", function(cssFile) {
+    stream.on('data', function(cssFile) {
       should.exist(cssFile);
       should.exist(cssFile.path);
       should.exist(cssFile.relative);
       should.exist(cssFile.contents);
-      var expectedPath = 'expected/mixins.css';
-      if (cssFile.path.indexOf("variables") !== -1) {
+      if (cssFile.path.indexOf('variables') !== -1) {
         expectedPath = 'expected/variables.css';
       }
       String(cssFile.contents).should.equal(
@@ -90,10 +98,10 @@ describe("gulp-sass", function() {
     });
   });
 
-  it("should compile files with partials in another folder", function(done) {
-    var sassFile = createVinyl("inheritance.scss");
+  it('should compile files with partials in another folder', function(done) {
+    var sassFile = createVinyl('inheritance.scss');
     var stream = sass();
-    stream.on("data", function(cssFile) {
+    stream.on('data', function(cssFile) {
       should.exist(cssFile);
       should.exist(cssFile.path);
       should.exist(cssFile.relative);
@@ -106,19 +114,19 @@ describe("gulp-sass", function() {
     stream.write(sassFile);
   });
 
-  it("should handle sass errors", function(done) {
-    var errorFile = createVinyl("error.scss");
+  it('should handle sass errors', function(done) {
+    var errorFile = createVinyl('error.scss');
     var stream = sass();
 
-    stream.on("error", function(err) {
+    stream.on('error', function(err) {
       err.message.indexOf('property "font" must be followed by a \':\'').should.equal(0);
       done();
     });
     stream.write(errorFile);
   });
 
-  it("should work with gulp-sourcemaps", function(done) {
-    var sassFile = createVinyl("inheritance.scss");
+  it('should work with gulp-sourcemaps', function(done) {
+    var sassFile = createVinyl('inheritance.scss');
 
     // Expected sources are relative to file.base
     var expectedSources = [
@@ -126,22 +134,23 @@ describe("gulp-sass", function() {
       'inheritance.scss'
     ];
 
+    var stream;
+
     sassFile.sourceMap = '{' +
       '"version": 3,' +
-      '"file": "scss/inheritance.scss",' +
+      '"file": "scss/subdir/multilevelimport.scss",' +
       '"names": [],' +
       '"mappings": "",' +
-      '"sources": [ "scss/inheritance.scss" ],' +
-      '"sourcesContent": [ "@import includes/cats;" ]' +
+      '"sources": [ "scss/subdir/multilevelimport.scss" ],' +
+      '"sourcesContent": [ "@import ../inheritance;" ]' +
     '}';
 
-    var stream = sass();
-    stream.on("data", function(cssFile) {
+    stream = sass();
+    stream.on('data', function(cssFile) {
       should.exist(cssFile.sourceMap);
       assert.deepEqual(cssFile.sourceMap.sources, expectedSources);
       done();
     });
     stream.write(sassFile);
-
   });
 });