diff --git a/test/dotNotation.js b/test/dotNotation.js
index dca2db4..b9f8be2 100644
--- a/test/dotNotation.js
+++ b/test/dotNotation.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var gutil = require('gulp-util');
+var File = require('vinyl');
 var should = require('should');
 var bump = require('..');
 
@@ -14,7 +14,7 @@ require('mocha');
     };
 
     it('should bump dot notation', function (done) {
-      var fakeFile = new gutil.File({
+      var fakeFile = new File({
         base: 'test/',
         cwd: 'test/',
         path: 'test/fixtures/package.json',
@@ -31,7 +31,7 @@ require('mocha');
     });
 
     it('should bump dot notation with type', function (done) {
-      var fakeFile = new gutil.File({
+      var fakeFile = new File({
         base: 'test/',
         cwd: 'test/',
         path: 'test/fixtures/package.json',
@@ -50,4 +50,24 @@ require('mocha');
       bumpS.write(fakeFile);
     });
 
+    it('should bump dot notation with specified version', function (done) {
+      var fakeFile = new File({
+        base: 'test/',
+        cwd: 'test/',
+        path: 'test/fixtures/package.json',
+        contents: new Buffer(JSON.stringify(dotObject, null, 2))
+      });
+      var bumpS = bump({
+        key: 'subversion.version',
+        version: '2.0.0'
+      });
+
+      bumpS.once('data', function(newFile) {
+        var json = JSON.parse(String(newFile.contents));
+        json.subversion.version.should.equal('2.0.0');
+        done();
+      });
+      bumpS.write(fakeFile);
+    });
+
   });
diff --git a/test/errorCases.js b/test/errorCases.js
index 3556667..4cae5ee 100644
--- a/test/errorCases.js
+++ b/test/errorCases.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var gutil = require('gulp-util');
+var File = require('vinyl');
 var should = require('should');
 var bump = require('..');
 
@@ -8,38 +8,36 @@ require('mocha');
 
 describe('Test failure cases cases in gulp-bump', function() {
 
+  var fakeFile = new File({
+    path: 'some-dir/dummyfile.js',
+    contents: new Buffer('{ "version": "0.0.0" }')
+  });
+
   it('should fail when not detect a valid semver version', function(done) {
-    var file = 'some-dir/dummyfile.js';
-    var fakeFile = new gutil.File({
-      path: file,
-      contents: new Buffer('{ "version": "0.A.1" }')
-    });
+
+    fakeFile.contents = new Buffer('{ "version": "0.A.1" }');
 
     var bumpS = bump();
 
     bumpS.on('error', function(e) {
       should.exist(e);
       e.message.should.equal('Detected invalid semver version');
-      e.fileName.should.containEql(file);
+      e.fileName.should.containEql(fakeFile.path);
       return done();
     });
     bumpS.write(fakeFile);
     bumpS.end();
   });
 
-  it('should fail when not detect a valid semver version and wrong key', function(done) {
-    var file = 'some-dir/dummyfile.js';
-    var fakeFile = new gutil.File({
-      path: file,
-      contents: new Buffer('{ "version": "0.0.1" }')
-    });
+  it('should fail with an invalid semver version', function(done) {
+    fakeFile.contents = new Buffer('{ "version": "0.0.1" }');
 
     var bumpS = bump({key: 'appversion'});
 
     bumpS.on('error', function(e) {
       should.exist(e);
       e.message.should.containEql('Detected invalid semver appversion');
-      e.fileName.should.containEql(file);
+      e.fileName.should.containEql(fakeFile.path);
       return done();
     });
     bumpS.write(fakeFile);
@@ -47,11 +45,7 @@ describe('Test failure cases cases in gulp-bump', function() {
   });
 
   it('should fail when supplied with an invalid JSON', function(done) {
-    var file = 'some-dir/dummyfile.js';
-    var fakeFile = new gutil.File({
-      path: file,
-      contents: new Buffer('{ invalid json oh no!!!}')
-    });
+    fakeFile.contents = new Buffer('{ invalid json oh no!!!}');
 
     var bumpS = bump();
 
@@ -59,7 +53,7 @@ describe('Test failure cases cases in gulp-bump', function() {
       should.exist(e);
       e.name.should.equal('Error');
       e.message.should.containEql('Problem parsing JSON file');
-      e.fileName.should.containEql(file);
+      e.fileName.should.containEql(fakeFile.path);
       return done();
     });
     bumpS.write(fakeFile);
@@ -67,9 +61,8 @@ describe('Test failure cases cases in gulp-bump', function() {
   });
 
   it('should fallback to defaults when supplied with invalid semver version', function(done) {
-    var fakeFile = new gutil.File({
-      contents: new Buffer('{ "version": "0.0.1" }')
-    });
+    fakeFile.contents = new Buffer('{ "version": "0.0.1" }');
+
     var bumpS = bump({version: '0.A.2'});
 
     bumpS.once('data', function(newFile) {
diff --git a/test/fileFixtures.js b/test/fileFixtures.js
index bda18da..7ced1c5 100644
--- a/test/fileFixtures.js
+++ b/test/fileFixtures.js
@@ -1,7 +1,7 @@
 'use strict';
 
 var fs = require('fs');
-var gutil = require('gulp-util');
+var File = require('vinyl');
 var should = require('should');
 var bump = require('..');
 
@@ -12,7 +12,7 @@ var fixtureFile = fs.readFileSync('test/fixtures/package.json');
 describe('gulp-bump: JSON File fixtures', function() {
 
   it('should bump minor by default', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -32,7 +32,7 @@ describe('gulp-bump: JSON File fixtures', function() {
   });
 
   it('should bump major if options.bump = major', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -52,7 +52,7 @@ describe('gulp-bump: JSON File fixtures', function() {
   });
 
   it('should bump minor if options.bump = minor', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -72,7 +72,7 @@ describe('gulp-bump: JSON File fixtures', function() {
   });
 
   it('should set version to value specified by options.version', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -92,7 +92,7 @@ describe('gulp-bump: JSON File fixtures', function() {
   });
 
   it('should set the key to a custom version', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/key.json',
diff --git a/test/index.js b/test/index.js
index 0059571..47341ba 100644
--- a/test/index.js
+++ b/test/index.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var gutil = require('gulp-util');
+var File = require('vinyl');
 var should = require('should');
 var bump = require('..');
 
@@ -9,7 +9,7 @@ require('mocha');
 describe('gulp-bump: JSON comparison fixtures', function() {
 
   it('should bump patch version by default', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.0.9" }'),
       path: 'test/fixtures/test.json'
     });
@@ -27,7 +27,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should bump patch version as default and a key=appversion', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "appversion": "0.0.1" }'),
       path: 'test/fixtures/test.json'
     });
@@ -45,7 +45,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should ignore invalid type and use type=patch', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.0.1" }'),
       path: 'test/fixtures/test.json'
     });
@@ -64,7 +64,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should set the correct version when supplied', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.0.1" }'),
       path: 'test/fixtures/test.json'
     });
@@ -82,7 +82,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should set the correct version when supplied even if key did not exist', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{}'),
       path: 'test/fixtures/test.json'
     });
@@ -100,7 +100,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should bump prerelease version', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.0.1-0"}'),
       path: 'test/fixtures/test.json'
     });
@@ -118,7 +118,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
    it('should bump to a prerelease version with a preid', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.0.1"}'),
       path: 'test/fixtures/test.json'
     });
@@ -136,7 +136,7 @@ describe('gulp-bump: JSON comparison fixtures', function() {
   });
 
   it('should bump preid version', function(done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       contents: new Buffer('{ "version": "0.1.0-zeta.1"}'),
       path: 'test/fixtures/test.json'
     });
diff --git a/test/whitespacePreserving.js b/test/whitespacePreserving.js
index f832731..e4724f6 100644
--- a/test/whitespacePreserving.js
+++ b/test/whitespacePreserving.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var gutil = require('gulp-util');
+var File = require('vinyl');
 var should = require('should');
 var bump = require('..');
 
@@ -12,7 +12,7 @@ describe('gulp-bump: Whitespace preserving', function() {
   var expectedObj = { version: '1.0.1' };
 
   var createFile = function (tabType) {
-    return new gutil.File({
+    return new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -54,7 +54,7 @@ describe('gulp-bump: Whitespace preserving', function() {
   });
 
   it('should preserve whitespace at end', function (done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',
@@ -70,7 +70,7 @@ describe('gulp-bump: Whitespace preserving', function() {
   });
 
   it('should not add new line to file', function (done) {
-    var fakeFile = new gutil.File({
+    var fakeFile = new File({
       base: 'test/',
       cwd: 'test/',
       path: 'test/fixtures/package.json',