diff --git a/html/editing/the-hidden-attribute/MANIFEST b/html/editing/the-hidden-attribute/MANIFEST
index b3f3cb2c81db1e..6de3700520e8dd 100644
--- a/html/editing/the-hidden-attribute/MANIFEST
+++ b/html/editing/the-hidden-attribute/MANIFEST
@@ -2,4 +2,7 @@ ref hidden-1a.html == hidden-1-ref.html
 ref hidden-1b.html == hidden-1-ref.html
 ref hidden-1c.html == hidden-1-ref.html
 ref hidden-1d.html == hidden-1-ref.html
+ref hidden-1e.html == hidden-1-ref.html
+ref hidden-1f.html == hidden-1-ref.html
+ref hidden-1g.html == hidden-1-ref.html
 ref hidden-2.svg == hidden-2-ref.svg
diff --git a/html/editing/the-hidden-attribute/hidden-1-ref.html b/html/editing/the-hidden-attribute/hidden-1-ref.html
index 60569125bedae7..7346ce919d210a 100644
--- a/html/editing/the-hidden-attribute/hidden-1-ref.html
+++ b/html/editing/the-hidden-attribute/hidden-1-ref.html
@@ -1,5 +1,4 @@
 <!doctype html>
 <title>The hidden attribute</title>
-<link rel=author title=Ms2ger href=ms2ger@gmail.com>
-<link rel=help href=http://www.whatwg.org/html5/#the-hidden-attribute>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
 <p>This line should be visible.
diff --git a/html/editing/the-hidden-attribute/hidden-1a.html b/html/editing/the-hidden-attribute/hidden-1a.html
index edcbf3abdee9bf..7ad39f4cf1f4b8 100644
--- a/html/editing/the-hidden-attribute/hidden-1a.html
+++ b/html/editing/the-hidden-attribute/hidden-1a.html
@@ -1,6 +1,7 @@
 <!doctype html>
 <title>The hidden attribute</title>
-<link rel=author title=Ms2ger href=ms2ger@gmail.com>
-<link rel=help href=http://www.whatwg.org/html5/#the-hidden-attribute>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
 <p>This line should be visible.
 <p hidden>This line should not be visible.
diff --git a/html/editing/the-hidden-attribute/hidden-1b.html b/html/editing/the-hidden-attribute/hidden-1b.html
index 92bb330454015d..abebbf7c516840 100644
--- a/html/editing/the-hidden-attribute/hidden-1b.html
+++ b/html/editing/the-hidden-attribute/hidden-1b.html
@@ -1,7 +1,8 @@
 <!doctype html>
 <title>The hidden attribute</title>
-<link rel=author title=Ms2ger href=ms2ger@gmail.com>
-<link rel=help href=http://www.whatwg.org/html5/#the-hidden-attribute>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
 <style>
 p { display: none; }
 [hidden] { display: block; }
diff --git a/html/editing/the-hidden-attribute/hidden-1c.html b/html/editing/the-hidden-attribute/hidden-1c.html
index 61960ccc906b9e..820793af966484 100644
--- a/html/editing/the-hidden-attribute/hidden-1c.html
+++ b/html/editing/the-hidden-attribute/hidden-1c.html
@@ -1,7 +1,8 @@
 <!doctype html>
 <title>The hidden attribute</title>
-<link rel=author title=Ms2ger href=ms2ger@gmail.com>
-<link rel=help href=http://www.whatwg.org/html5/#the-hidden-attribute>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
 <p hidden>This line should be visible.
 <p>This line should not be visible.
 <script>
diff --git a/html/editing/the-hidden-attribute/hidden-1d.html b/html/editing/the-hidden-attribute/hidden-1d.html
index 94d3a7bfee3e2d..54b7187d6c0b18 100644
--- a/html/editing/the-hidden-attribute/hidden-1d.html
+++ b/html/editing/the-hidden-attribute/hidden-1d.html
@@ -1,7 +1,8 @@
 <!doctype html>
 <title>The hidden attribute</title>
-<link rel=author title=Ms2ger href=ms2ger@gmail.com>
-<link rel=help href=http://www.whatwg.org/html5/#the-hidden-attribute>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
 <p hidden>This line should be visible.
 <p>This line should not be visible.
 <script>
diff --git a/html/editing/the-hidden-attribute/hidden-1e.html b/html/editing/the-hidden-attribute/hidden-1e.html
new file mode 100644
index 00000000000000..3849dfbd6ad079
--- /dev/null
+++ b/html/editing/the-hidden-attribute/hidden-1e.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<title>The hidden attribute</title>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
+<style>
+p { display: block; }
+</style>
+<p hidden>This line should be visible.
diff --git a/html/editing/the-hidden-attribute/hidden-1f.html b/html/editing/the-hidden-attribute/hidden-1f.html
new file mode 100644
index 00000000000000..2119dafe128ca8
--- /dev/null
+++ b/html/editing/the-hidden-attribute/hidden-1f.html
@@ -0,0 +1,9 @@
+<!doctype html>
+<title>The hidden attribute</title>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
+<style>
+p { display: block !important; }
+</style>
+<p hidden>This line should be visible.
diff --git a/html/editing/the-hidden-attribute/hidden-1g.html b/html/editing/the-hidden-attribute/hidden-1g.html
new file mode 100644
index 00000000000000..ad65e0bae49c61
--- /dev/null
+++ b/html/editing/the-hidden-attribute/hidden-1g.html
@@ -0,0 +1,10 @@
+<!doctype html>
+<title>The hidden attribute</title>
+<link rel=author title=Ms2ger href=mailto:Ms2ger@gmail.com>
+<link rel=help href=http://www.whatwg.org/html/#the-hidden-attribute>
+<link rel=help href=http://www.whatwg.org/html/#hidden-elements>
+<p>This line should be visible.
+<p hidden=hidden>This line should not be visible.
+<p hidden=blue>This line should not be visible.
+<p hidden=true>This line should not be visible.
+<p hidden=false>This line should not be visible.
diff --git a/html/editing/the-hidden-attribute/hidden-2-ref.svg b/html/editing/the-hidden-attribute/hidden-2-ref.svg
index 8aacdc8a5b9fed..10931bfcab7629 100644
--- a/html/editing/the-hidden-attribute/hidden-2-ref.svg
+++ b/html/editing/the-hidden-attribute/hidden-2-ref.svg
@@ -1,9 +1,7 @@
 <svg xmlns="http://www.w3.org/2000/svg" height="20" width="20">
 <metadata>
   <link xmlns="http://www.w3.org/1999/xhtml" rel="author" title="Ms2ger"
-        href="ms2ger@gmail.com"/>
-  <link xmlns="http://www.w3.org/1999/xhtml" rel="help"
-        href="http://www.whatwg.org/html5/#the-hidden-attribute"/>
+        href="mailto:Ms2ger@gmail.com"/>
 </metadata>
 <rect height="20" width="20"/>
 </svg>
diff --git a/html/editing/the-hidden-attribute/hidden-2.svg b/html/editing/the-hidden-attribute/hidden-2.svg
index 9a0db1e7beb945..2469b50989817b 100644
--- a/html/editing/the-hidden-attribute/hidden-2.svg
+++ b/html/editing/the-hidden-attribute/hidden-2.svg
@@ -1,9 +1,11 @@
 <svg xmlns="http://www.w3.org/2000/svg" height="20" width="20">
 <metadata>
   <link xmlns="http://www.w3.org/1999/xhtml" rel="author" title="Ms2ger"
-        href="ms2ger@gmail.com"/>
+        href="mailto:Ms2ger@gmail.com"/>
   <link xmlns="http://www.w3.org/1999/xhtml" rel="help"
-        href="http://www.whatwg.org/html5/#the-hidden-attribute"/>
+        href="http://www.whatwg.org/html/#the-hidden-attribute"/>
+  <link xmlns="http://www.w3.org/1999/xhtml" rel="help"
+        href="http://www.whatwg.org/html/#hidden-elements"/>
 </metadata>
 <rect hidden="" height="20" width="20"/>
 </svg>
