diff --git a/test/main.js b/test/main.js
index 89b7bc3d..9048eb82 100644
--- a/test/main.js
+++ b/test/main.js
@@ -30,6 +30,8 @@ describe('dotenv', function () {
     beforeEach(function (done) {
       readFileSyncStub = s.stub(fs, 'readFileSync').returns('test=val')
       parseStub = s.stub(dotenv, 'parse').returns({test: 'val'})
+      delete process.env.test // clean up
+
       done()
     })
 
@@ -90,6 +92,16 @@ describe('dotenv', function () {
       done()
     })
 
+    it('returns inserted values and parsed values (which can be different if already preset)', function (done) {
+      process.env.test = 'test'
+
+      var env = dotenv.config()
+
+      env.parsed.should.eql({ test: 'val' })
+      env.inserted.should.eql({ test: 'test' })
+      done()
+    })
+
     it('returns any errors thrown from reading file or parsing', function (done) {
       readFileSyncStub.throws()