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diff --git a/testing/web-platform/tests/custom-elements/v0/custom-element-lifecycle/types-of-callbacks/attribute-changed-callback-remove-attribute-test.html b/testing/web-platform/tests/custom-elements/v0/custom-element-lifecycle/types-of-callbacks/attribute-changed-callback-remove-attribute-test.html
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index 000000000..fb451b074
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+++ b/testing/web-platform/tests/custom-elements/v0/custom-element-lifecycle/types-of-callbacks/attribute-changed-callback-remove-attribute-test.html
@@ -0,0 +1,166 @@
+<!DOCTYPE html>
+<html>
+<head>
+<title>Test attribute removing to check attributeChanged callback of a custom element</title>
+<meta name="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
+<meta name="assert" content="attributeChanged callback must be enqueued whenever custom element's attribute is removed">
+<link rel="help" href="http://www.w3.org/TR/custom-elements/#types-of-callbacks">
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="../../testcommon.js"></script>
+</head>
+<body>
+<div id="log"></div>
+<script>
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    var GeneratedConstructor = doc.registerElement('x-a', {prototype: proto});
+
+    var customElement = new GeneratedConstructor();
+    //attributeChangedCallback should be called the first time here
+    customElement.setAttribute('class', 'someClass');
+    //attributeChangedCallback should be called the second time here
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 'Callback attributeChanged should be called ' +
+        'after setAttribute() and removeAttribute() calls');
+}, 'Test attributeChanged callback if attribute is removed. ' +
+    'The custom element created via constructor');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    HTML5_ELEMENTS.forEach(function(element) {
+        var obj = doc.createElement(element);
+        var proto = newCustomElementPrototype(obj.constructor.prototype);
+        var GeneratedConstructor = doc.registerElement('x-' + element + '-' + element + '-1', {
+            prototype: proto,
+            extends: element
+        });
+
+        var customElement = new GeneratedConstructor();
+        //attributeChangedCallback should be called the first time here
+        customElement.setAttribute('class', 'someClass');
+        //attributeChangedCallback should be called the second time here
+        customElement.removeAttribute('class');
+        assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 
+            'Callback attributeChanged should be called ' +
+            'after setAttribute() and removeAttribute() calls for "' + element + '"');
+    });
+}, 'Test attributeChanged callback if attribute is removed. ' +
+    'The custom element created via constructor and extends HTML element');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-b', {prototype: proto});
+
+    doc.body.innerHTML = '<x-b id="x-b" class="theClass"></x-b>';
+    var customElement = doc.querySelector('#x-b');
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 1, 
+        'Callback attributeChanged should be called ' +
+        'after removeAttribute() call');
+}, 'Test attributeChanged callback if attribute is removed. ' +
+    'The custom element created via innerHTML property');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-c', {prototype: proto});
+
+    doc.body.innerHTML = '<x-c id="x-c" class="theClass"></x-c>';
+    var customElement = doc.querySelector('#x-c');
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackArgs[2], null, 
+        'Removing an attribute should invoke ' +
+        'the attributeChanged callback with a null new value');
+    assert_array_equals(proto.attributeChangedCallbackArgs, 
+        ['class', 'theClass', null],
+        'Unexpected attributeChanged callback arguments');
+}, 'Test attributeChanged callback arguments if attribute is removed. ' +
+    'The custom element created via innerHTML property');
+
+
+test(function() {
+    var doc = newHTMLDocument();
+    var proto = newHTMLElementPrototype();
+
+    doc.body.innerHTML = '<x-d id="x-d" class="theClass"></x-d>';
+    var customElement = doc.querySelector('#x-d');
+    // this should not call or enqueue attributeChangedCallback
+    customElement.setAttribute('class', 'someClass');
+    // this one should not too
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 0, 
+        'Callback attributeChanged should not be called');
+
+    doc.registerElement('x-d', {prototype: proto});
+    // this call invokes attributeChangedCallback
+    customElement.setAttribute('name', 'someName');
+    // and this one
+    customElement.removeAttribute('name');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 
+        'Callback attributeChanged should be called ' +
+        'after setAttribute() and removeAttribute() calls');
+}, 'Test attributeChanged callback is not called if attribute is removed. ' +
+    'The custom element created via innerHTML property and unresolved at first');
+
+
+testInIFrame('../../resources/x-element.html', function(doc) {
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-element', {prototype: proto});
+
+    var customElement = doc.querySelector('#x-element');
+    customElement.setAttribute('class', 'someClass');
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 
+        'Callback attributeChanged should be called ' +
+        'after setAttribute() and removeAttribute() calls');
+}, 'Test attributeChanged callback is called if attribute is removed. ' +
+    'The custom element created via constructor and the document has browsing context');
+
+
+testInIFrame('../../resources/x-element.html', function(doc) {
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-element', {prototype: proto});
+
+    doc.body.innerHTML = '<x-element id="x-element" class="theClass"></x-element>';
+    var customElement = doc.querySelector('#x-element');
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackArgs[2], null, 
+        'Removing an attribute should invoke ' +
+        'the attributeChanged callback with a null new value');
+    assert_array_equals(proto.attributeChangedCallbackArgs, 
+        ['class', 'theClass', null],
+        'Unexpected attributeChanged callback arguments');
+}, 'Test attributeChanged callback arguments if attribute is removed. ' +
+    'The custom element created via innerHTML property and the document has browsing context');
+
+
+testInIFrame('../../resources/x-element.html', function(doc) {
+    var customElement = doc.querySelector('#x-element');
+    // this should not call or enqueue attributeChangedCallback
+    customElement.setAttribute('name', 'someName');
+    // this one too
+    customElement.removeAttribute('name');
+
+    var proto = newHTMLElementPrototype();
+    doc.registerElement('x-element', {prototype: proto});
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 0, 
+        'Callback attributeChanged should not be called');
+    // this call invokes attributeChangedCallback
+    customElement.setAttribute('class', 'someClass');
+    // this call invokes attributeChangedCallback at second time
+    customElement.removeAttribute('class');
+    assert_equals(proto.attributeChangedCallbackCalledCounter, 2, 
+        'Callback attributeChanged should be called ' +
+        'after setAttribute() and removeAttribute() calls');
+}, 'Test attributeChanged callback if attribute is removed. ' +
+    'The custom element created via innerHTML property and unresolved at first. ' +
+    'The document has browsing context');
+</script>
+</body>
+</html>