diff --git a/.gitignore b/.gitignore
index 08d7879..00ce13c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,3 +17,6 @@ node_modules
 
 browser-version/src
 browser-version/node_modules
+
+*.swp
+*~
diff --git a/lib/model.js b/lib/model.js
index 5bbf1f7..18a8023 100644
--- a/lib/model.js
+++ b/lib/model.js
@@ -72,8 +72,7 @@ function serialize (obj) {
     if (v === null) { return null; }
 
     // Hackish way of checking if object is Date (this way it works between execution contexts in node-webkit).
-    // We can't use value directly because for dates it is already string in this function (date.toJSON was already called),
-    // fortunately "this" is bound here to object which is owner of the key.
+    // We can't use value directly because for dates it is already string in this function (date.toJSON was already called), so we use this
     if (typeof this[k].getTime === 'function') { return { $$date: this[k].getTime() }; }
 
     return v;
diff --git a/test/model.test.js b/test/model.test.js
index 499bbdf..d1057b8 100644
--- a/test/model.test.js
+++ b/test/model.test.js
@@ -82,6 +82,7 @@ describe('Model', function () {
       b = model.serialize(a);
       c = model.deserialize(b);
       b.indexOf('\n').should.equal(-1);
+      b.should.equal('{"test":{"$$date":' + d.getTime() + '}}');
       util.isDate(c.test).should.equal(true);
       c.test.getTime().should.equal(d.getTime());
     });