diff --git a/shadow-dom/styles/at-host-at-rule/matching-specificity-of-css-rules-001.html b/shadow-dom/styles/at-host-at-rule/matching-specificity-of-css-rules-001.html
deleted file mode 100644
index 0b604017e9fe8..0000000000000
--- a/shadow-dom/styles/at-host-at-rule/matching-specificity-of-css-rules-001.html
+++ /dev/null
@@ -1,64 +0,0 @@
-<!DOCTYPE html>
-<!--
-Distributed under both the W3C Test Suite License [1] and the W3C
-3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
-policies and contribution forms [3].
-
-[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
-[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
-[3] http://www.w3.org/2004/10/27-testcases
--->
-<html>
-<head>
-<title>Shadow DOM Test: The matching specificity of CSS rules for @host @-rule</title>
-<link rel="author" title="Moto Ishizawa" href="mailto:summerwind.jp@gmail.com">
-<link rel="help" href="http://www.w3.org/TR/2013/WD-shadow-dom-20130514/#host-at-rule">
-<meta name="assert" content="@host @-rule: Test the matching specificity of CSS rules for @host">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../../testcommon.js"></script>
-<link rel="stylesheet" href="/resources/testharness.css">
-<style>
-    #test-id    { display: block; }
-    .test-class { display: block; }
-    li          { display: block; }
-</style>
-</head>
-<body>
-<div id="log"></div>
-<script>
-test(unit(function (ctx) {
-    var d = newRenderedHTMLDocument(ctx);
-
-    d.body.innerHTML =
-        '<ul id="host">' +
-           '<li>1</li>' +
-            '<li id="test-id">2</li>' +
-            '<li class="test-class">3</li>' +
-            '<li id="test-id" class="test-class">4</li>' +
-            '<li style="display: block;">5</li>' +
-        '</ul>';
-
-    var host = d.querySelector('#host');
-    var s = createSR(host);
-
-    var div = d.createElement('div');
-    div.innerHTML = '<div id="shDiv"><span>Div in the Shadow tree</span></div>'
-                  + '<ul><content></content></ul>';
-    s.appendChild(div);
-
-    var style = d.createElement('style');
-    style.textContent = '@host {'
-                      + 'li { display: none; }'
-                      + '}';
-    s.appendChild(style);
-
-    var li_list = d.querySelectorAll('#host li');
-    assert_equals(li_list[0].offsetHeight, 0, 'Point 1: @host rules applies');
-    assert_equals(li_list[1].offsetHeight, 0, 'Point 2: @host rules applies');
-    assert_equals(li_list[2].offsetHeight, 0, 'Point 3: @host rules applies');
-    assert_equals(li_list[3].offsetHeight, 0, 'Point 4: @host rules applies');
-    assert_not_equals(li_list[4].offsetHeight, 0, 'Point 5: style attribute value applies');
-}), 'Only the last "li" element of shadow trees is displayed');
-</script>
-</body>
diff --git a/shadow-dom/styles/at-host-at-rule/test-001.html b/shadow-dom/styles/at-host-at-rule/test-001.html
deleted file mode 100644
index 5d4bacee2ff22..0000000000000
--- a/shadow-dom/styles/at-host-at-rule/test-001.html
+++ /dev/null
@@ -1,151 +0,0 @@
-<!DOCTYPE html>
-<!--
-Distributed under both the W3C Test Suite License [1] and the W3C
-3-clause BSD License [2]. To contribute to a W3C Test Suite, see the
-policies and contribution forms [3].
-
-[1] http://www.w3.org/Consortium/Legal/2008/04-testsuite-license
-[2] http://www.w3.org/Consortium/Legal/2008/03-bsd-license
-[3] http://www.w3.org/2004/10/27-testcases
--->
-<html>
-<head>
-<title>Shadow DOM Test: A_06_03_01</title>
-<link rel="author" title="Sergey G. Grekhov" href="mailto:sgrekhov@unipro.ru">
-<link rel="help" href="http://www.w3.org/TR/2013/WD-shadow-dom-20130514/#host-at-rule">
-<meta name="assert" content="@host @-rule: The declarations of the rules in a @host @-rule must only be matched against the shadow host of the shadow tree in which the style is specified">
-<script src="/resources/testharness.js"></script>
-<script src="/resources/testharnessreport.js"></script>
-<script src="../../testcommon.js"></script>
-<link rel="stylesheet" href="/resources/testharness.css">
-</head>
-<body>
-<div id="log"></div>
-<script>
-// The some of the tests below fails.
-// See https://bugs.webkit.org/show_bug.cgi?id=103608
-
-
-
-//TODO (sgrekhov) Check the expected result at https://www.w3.org/Bugs/Public/show_bug.cgi?id=20150
-test(unit(function (ctx) {
-	var d = newRenderedHTMLDocument(ctx);
-
-    d.head.innerHTML = '' +
-			'@host {' +
-				'div {display:none;}' +
-			'}';
-
-    d.body.innerHTML =
-    	'<ul class="cls">' +
-    		'<li id="li1" class="shadow">1</li>' +
-    		'<li id="li2" class="shadow2">2</li>' +
-    		'<li id="li3" class="shadow">3</li>' +
-    		'<li id="li4">4</li>' +
-    		'<li id="li5" class="shadow">5</li>' +
-    		'<li id="li6" class="shadow2">6</li>' +
-    	'</ul>';
-
-    var host = d.querySelector('.cls');
-	//Shadow root to play with
-	var s = createSR(host);
-
-	var div = d.createElement('div');
-	div.innerHTML = '' +
-		'<div id="shDiv"><span>Div in the Shadow tree</span></div>' +
-		'<ul><content select=".shadow"></content></ul>';
-	s.appendChild(div);
-
-	assert_true(s.querySelector('#shDiv').offsetTop > 0,
-		'Point 1: element should be rendered');
-	assert_true(d.querySelector('#li1').offsetTop > 0,
-		'Point 2: element should be rendered');
-	assert_true(d.querySelector('#li3').offsetTop > 0,
-		'Point 3: element should be rendered');
-	assert_true(d.querySelector('#li5').offsetTop > 0,
-		'Point 4: element should be rendered');
-
-
-}), 'A_06_03_01_T01');
-
-
-//Test fails. See https://bugs.webkit.org/show_bug.cgi?id=103608
-test(unit(function (ctx) {
-	var d = newRenderedHTMLDocument(ctx);
-
-	d.body.innerHTML =
-		'<ul class="cls">' +
-			'<li id="li1" class="shadow">1</li>' +
-			'<li id="li2" class="shadow2">2</li>' +
-			'<li id="li3" class="shadow">3</li>' +
-			'<li id="li4">4</li>' +
-			'<li id="li5" class="shadow">5</li>' +
-			'<li id="li6" class="shadow2">6</li>' +
-		'</ul>';
-
-	var host = d.querySelector('.cls');
-	//Shadow root to play with
-	var s = createSR(host);
-
-	var div = d.createElement('div');
-	div.innerHTML = '' +
-		'<div id="shDiv"><span>Div in the Shadow tree</span></div>' +
-		'<ul><content select=".shadow"></content></ul>';
-	s.appendChild(div);
-
-	var style = d.createElement('style');
-    style.innerHTML = '' +
-			'@host {' +
-				'div{display:none;}' +
-			'}';
-	s.appendChild(style);
-
-	assert_equals(s.querySelector('#shDiv').offsetTop, 0,
-		'Point 1: element should not be rendered');
-	assert_equals(d.querySelector('#li1').offsetTop, 0,
-		'Point 2: element should not be rendered');
-	assert_equals(d.querySelector('#li3').offsetTop, 0,
-		'Point 3: element should not be rendered');
-	assert_equals(d.querySelector('#li5').offsetTop, 0,
-		'Point 4: element should not be rendered');
-
-
-}), 'A_06_03_01_T02');
-
-
-//Test fails. See https://bugs.webkit.org/show_bug.cgi?id=103608
-test(unit(function (ctx) {
-	var d = newRenderedHTMLDocument(ctx);
-
-    var host = d.createElement('div');
-    d.body.appendChild(host);
-
-	//Older tree
-	var s1 = createSR(host);
-	var div1 = d.createElement('div');
-	div1.innerHTML = '<span id="shd1">This is an old shadow tree</span>';
-	s1.appendChild(div1);
-
-	//Younger tree
-	var s2 = createSR(host);
-	var div1 = d.createElement('div');
-	div1.innerHTML = '<div><span id="shd2">This is a young shadow tree</span></div>' +
-		'<shadow><span id="shd3">This is the shadow tree fallback content</span></shadow>';
-	s2.appendChild(div1);
-
-	var style = d.createElement('style');
-    style.innerHTML = '' +
-			'@host {' +
-				'div{display:none;}' +
-			'}';
-	s2.appendChild(style);
-
-	assert_equals(s2.querySelector('#shd2').offsetTop, 0,
-		'Element should not be rendered');
-	assert_true(s1.querySelector('#shd1').offsetTop > 0,
-		'Element should not be rendered');
-
-}), 'A_06_03_01_T03');
-</script>
-</body>
-</html>
