diff --git a/lib/minify.js b/lib/minify.js
index a94dc25..d4c3ea4 100644
--- a/lib/minify.js
+++ b/lib/minify.js
@@ -1,6 +1,5 @@
 'use strict';
 var Buffer = require('safe-buffer').Buffer;
-var applySourceMap = require('vinyl-sourcemaps-apply');
 var isObject = require('isobject');
 var extend = require('extend-shallow');
 var createError = require('./create-error');
@@ -70,7 +69,7 @@ module.exports = function(uglify, log) {
 
       if (hasSourceMaps) {
         var sourceMap = JSON.parse(mangled.map);
-        applySourceMap(file, sourceMap);
+        file.sourceMap = sourceMap;
       }
 
       return file;
diff --git a/package.json b/package.json
index 0661943..113e1d2 100644
--- a/package.json
+++ b/package.json
@@ -13,8 +13,7 @@
     "make-error-cause": "^1.1.1",
     "safe-buffer": "^5.1.2",
     "through2": "^2.0.0",
-    "uglify-js": "^3.0.5",
-    "vinyl-sourcemaps-apply": "^0.2.0"
+    "uglify-js": "^3.0.5"
   },
   "devDependencies": {
     "eslint": "^3.18.0",
diff --git a/test/sourcemap.js b/test/sourcemap.js
index d4ee8fd..ac11c38 100644
--- a/test/sourcemap.js
+++ b/test/sourcemap.js
@@ -4,14 +4,22 @@ var assert = require('assert');
 var Buffer = require('safe-buffer').Buffer;
 var Vinyl = require('vinyl');
 var SourceListMap = require('source-list-map').SourceListMap;
-var fromStringWithSourceMap = require('source-list-map')
-  .fromStringWithSourceMap;
 var td = require('testdouble');
 var minify = require('../lib/minify');
+// Use actual UglifyJS so we are validating that the final sourcemap is indeed merged
+var uglify = require('uglify-js');
 
 test('sourcemaps should be merged', function(t) {
-  var testContents1Input =
-    '(function(first, second) {\n    console.log(first + second);\n}(5, 10));\n';
+  // Output of babel on 'let [a,b] = [1,2]`
+  var testContents1PreviousMap = {
+    version: 3,
+    file: 'test1.js',
+    sources: ['test1.js'],
+    sourcesContent: ['let [a,b] = [1,2];\n'],
+    names: ['a', 'b'],
+    mappings: ';;IAAKA,C,GAAQ,C;IAANC,C,GAAQ,C'
+  };
+  var testContents1Input = '"use strict";\n\nvar a = 1,\n    b = 2;';
   var testFile = new Vinyl({
     cwd: '/home/terin/broken-promises/',
     base: '/home/terin/broken-promises/test',
@@ -19,46 +27,17 @@ test('sourcemaps should be merged', function(t) {
     contents: Buffer.from(testContents1Input)
   });
 
-  var originalMap = new SourceListMap();
-  originalMap.add(testContents1Input, 'test1.js', testContents1Input);
-  testFile.sourceMap = originalMap.toStringWithSourceMap({
-    file: 'test1.js'
-  }).map;
+  testFile.sourceMap = testContents1PreviousMap;
 
-  var outMap = fromStringWithSourceMap(
-    'foobar',
-    testFile.sourceMap
-  ).toStringWithSourceMap({file: 'test1.js'});
-
-  var uglify = td.object(['minify']);
   var logger = td.object(['logger']);
 
-  td.when(
-    uglify.minify(
-      {
-        'test1.js': testContents1Input
-      },
-      {
-        output: {},
-        sourceMap: {
-          filename: 'test1.js',
-          includeSources: true,
-          content: testFile.sourceMap
-        }
-      }
-    )
-  ).thenReturn({
-    code: 'foobar',
-    map: JSON.stringify(outMap.map)
-  });
-
   var subject = minify(uglify, logger)({});
   var file = subject(testFile);
 
   assert.ok(file instanceof Vinyl);
   assert.ok(Buffer.isBuffer(file.contents), 'file contents are a buffer');
 
-  assert.equal(String(file.contents), 'foobar');
+  assert.equal(String(file.contents), '"use strict";var a=1,b=2;');
 
   assert.ok(file.sourceMap, 'has a source map');
   assert.equal(file.sourceMap.version, 3, 'source map has expected version');
@@ -68,14 +47,18 @@ test('sourcemaps should be merged', function(t) {
   );
   assert.ok(Array.isArray(file.sourceMap.names), 'source maps has names array');
   assert.ok(file.sourceMap.mappings, 'source map has mappings');
+  // Note: All mappings are from a single line
+  // Expected output:
+  // http://sokra.github.io/source-map-visualization/#base64,InVzZSBzdHJpY3QiO3ZhciBhPTEsYj0yOw==,eyJ2ZXJzaW9uIjozLCJmaWxlIjoiY2xpZW50L2FwcC5qcyIsInNvdXJjZXMiOlsiY2xpZW50L2FwcC5qcyJdLCJzb3VyY2VzQ29udGVudCI6WyJsZXQgW2EsYl0gPSBbMSwyXTtcbiJdLCJuYW1lcyI6WyJhIiwiYiJdLCJtYXBwaW5ncyI6ImlCQUFLQSxFQUFRLEVBQU5DLEVBQVEifQ==,bGV0IFthLGJdID0gWzEsMl07Cg==
+  assert.equal(file.sourceMap.mappings, 'iBAAKA,EAAQ,EAANC,EAAQ');
   td.reset();
   t.end();
 });
 
 test('sourcemaps should merge when concatted', function(t) {
   var inMap = new SourceListMap();
-  inMap.add('foo\n', 'foo.js', 'foo\n');
-  inMap.add('bar\n', 'bar.js', 'bar\n');
+  inMap.add('var foo=1;\n', 'foo.js', 'var foo=1;\n');
+  inMap.add('var bar=1;\n', 'bar.js', 'var bar=1;\n');
 
   var testFile = new Vinyl({
     cwd: '/home/terin/broken-promises/',
@@ -85,42 +68,14 @@ test('sourcemaps should merge when concatted', function(t) {
   });
   testFile.sourceMap = inMap.toStringWithSourceMap({file: 'test1.js'}).map;
 
-  var outMap = new SourceListMap();
-  outMap.add(' ', 'foo.js', 'foo\n');
-  outMap.add(' ', 'bar.js', 'bar\n');
-  outMap = outMap.toStringWithSourceMap({file: 'test1.js'});
-
-  var uglify = td.object(['minify']);
   var logger = td.object(['warn']);
 
-  td.when(
-    uglify.minify(
-      {
-        'test1.js': String(inMap)
-      },
-      {
-        output: {},
-        sourceMap: {
-          filename: 'test1.js',
-          includeSources: true,
-          content: testFile.sourceMap
-        }
-      }
-    )
-  ).thenReturn({
-    code: 'send a PR changing this to the best La Croix flavor',
-    map: JSON.stringify(outMap.map)
-  });
-
   var subject = minify(uglify, logger)({});
   var file = subject(testFile);
 
   assert.ok(file instanceof Vinyl);
   assert.ok(Buffer.isBuffer(file.contents), 'file contents are a buffer');
-  assert.equal(
-    String(file.contents),
-    'send a PR changing this to the best La Croix flavor'
-  );
+  assert.equal(String(file.contents), 'var foo=1,bar=1;');
 
   assert.ok(file.sourceMap, 'has a source map');
   assert.equal(file.sourceMap.version, 3, 'source map has expected version');
@@ -135,6 +90,9 @@ test('sourcemaps should merge when concatted', function(t) {
   );
   assert.ok(Array.isArray(file.sourceMap.names), 'source maps has names array');
   assert.ok(file.sourceMap.mappings, 'source map has mappings');
+  // Expected output:
+  // http://sokra.github.io/source-map-visualization/#base64,dmFyIGZvbz0xLGJhcj0xOw==,eyJ2ZXJzaW9uIjozLCJmaWxlIjoidGVzdDEuanMiLCJzb3VyY2VzIjpbImZvby5qcyIsImJhci5qcyJdLCJzb3VyY2VzQ29udGVudCI6WyJ2YXIgZm9vPTE7XG4iLCJ2YXIgYmFyPTE7XG4iXSwibmFtZXMiOlsiZm9vIiwiYmFyIl0sIm1hcHBpbmdzIjoiQUFBQSxJQUFBQSxJQUFBLEVDQUFDLElBQUEifQ==,dmFyIGZvbz0xOwo=,dmFyIGJhcj0xOwo=
+  assert.equal(file.sourceMap.mappings, 'AAAA,IAAAA,IAAA,ECAAC,IAAA');
   td.reset();
   t.end();
 });