diff --git a/test/collection.ts b/test/collection.ts
index 40fe888..8efb9bb 100644
--- a/test/collection.ts
+++ b/test/collection.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { Collection } from "../";
+import { Collection } from "../src";
 
 describe("Collection", () => {
 
diff --git a/test/convert.ts b/test/convert.ts
index 38640f7..cedc64a 100644
--- a/test/convert.ts
+++ b/test/convert.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { Convert } from "../";
+import { Convert } from "../src";
 
 describe("Convert", () => {
 
diff --git a/test/converters.ts b/test/converters.ts
index fe752f7..f4f6051 100644
--- a/test/converters.ts
+++ b/test/converters.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
-import { XmlAttribute, XmlElement, XmlObject } from "../";
-import { XmlBase64Converter, XmlBooleanConverter, XmlNumberConverter } from "../";
+import { XmlAttribute, XmlElement, XmlObject } from "../src";
+import { XmlBase64Converter, XmlBooleanConverter, XmlNumberConverter } from "../src";
 
 // const xmldom = require("xmldom-alpha");
 // const DOMParser = xmldom.DOMParser;
diff --git a/test/decorators.ts b/test/decorators.ts
index 27d3617..17ef504 100644
--- a/test/decorators.ts
+++ b/test/decorators.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { Parse, XmlAttribute, XmlBase64Converter, XmlChildElement, XmlCollection, XmlContent, XmlElement, XmlNumberConverter, XmlObject } from "../";
+import { Parse, XmlAttribute, XmlBase64Converter, XmlChildElement, XmlCollection, XmlContent, XmlElement, XmlNumberConverter, XmlObject } from "../src";
 
 // const xmldom = require("xmldom-alpha");
 // const DOMParser = xmldom.DOMParser;
diff --git a/test/error.ts b/test/error.ts
index bb3a45d..220c55d 100644
--- a/test/error.ts
+++ b/test/error.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { XE, XmlError } from "../";
+import { XE, XmlError } from "../src";
 
 describe("Error", () => {
 
diff --git a/test/get_load.ts b/test/get_load.ts
index eb89b0c..486f3c9 100644
--- a/test/get_load.ts
+++ b/test/get_load.ts
@@ -1,7 +1,7 @@
 import * as assert from "assert";
-import { XmlAttribute, XmlChildElement, XmlElement } from "../";
-import { XmlCollection, XmlObject } from "../";
-import { XmlNumberConverter } from "../";
+import { XmlAttribute, XmlChildElement, XmlElement } from "../src";
+import { XmlCollection, XmlObject } from "../src";
+import { XmlNumberConverter } from "../src";
 
 context("GetXml/LoadXml/HasChanged", () => {
 
diff --git a/test/namespace_manager.ts b/test/namespace_manager.ts
index b09fa06..92a4d1d 100644
--- a/test/namespace_manager.ts
+++ b/test/namespace_manager.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { NamespaceManager } from "../";
+import { NamespaceManager } from "../src";
 
 context("NamespaceManager", () => {
 
diff --git a/test/object.ts b/test/object.ts
index d58d4d1..fd564f2 100644
--- a/test/object.ts
+++ b/test/object.ts
@@ -1,6 +1,6 @@
 import * as assert from "assert";
-import { XmlAttribute, XmlElement } from "../";
-import { XmlObject } from "../";
+import { XmlAttribute, XmlElement } from "../src";
+import { XmlObject } from "../src";
 
 context("XmlObject", () => {
 
diff --git a/test/utils.ts b/test/utils.ts
index 1d1664f..855d6f9 100644
--- a/test/utils.ts
+++ b/test/utils.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { assign, Parse, SelectNamespaces, SelectSingleNode, Stringify } from "../";
+import { assign, Parse, SelectNamespaces, SelectSingleNode, Stringify } from "../src";
 
 context("utils", () => {
 
diff --git a/test/xml_collection.ts b/test/xml_collection.ts
index 93ad9c3..f79567c 100644
--- a/test/xml_collection.ts
+++ b/test/xml_collection.ts
@@ -1,5 +1,5 @@
 import * as assert from "assert";
-import { XmlAttribute, XmlCollection, XmlElement, XmlObject } from "../";
+import { XmlAttribute, XmlCollection, XmlElement, XmlObject } from "../src";
 
 context("XmlCollection", () => {
     @XmlElement({
@@ -22,6 +22,7 @@ context("XmlCollection", () => {
     @XmlElement({
         localName: "children",
         namespaceURI: "http://some.com",
+        parser: Child,
     })
     class Children extends XmlCollection<Child> {
     }
@@ -144,4 +145,36 @@ context("XmlCollection", () => {
             return item.Id === 1;
         }), false);
     });
+
+    context("HasChanged", () => {
+
+        it("Initialized empty collection is not changed", () => {
+            const col = new Children();
+            assert.equal(col.HasChanged(), false);
+        });
+
+        it("Update state on item adding", () => {
+            const col = new Children();
+            col.Add(new Child());
+            assert.equal(col.HasChanged(), true);
+        });
+
+        it("Update state on item removing", () => {
+            const col = new Children();
+            col.Add(new Child());
+            col.GetXml();
+            assert.equal(col.HasChanged(), false);
+            col.RemoveAt(0);
+            assert.equal(col.HasChanged(), true);
+        });
+
+        it("Set unchanged state for loaded XML", () => {
+            const xml = `<children xmlns="http://some.com"><child id="0"/><child id="1"/></children>`;
+            const col = new Children();
+            col.LoadXml(xml);
+            assert.equal(col.HasChanged(), false);
+            assert.equal(col.Item(0)!.HasChanged(), false);
+        });
+
+    });
 });