diff --git a/mathml/presentation-markup/menclose/legacy-menclose-radical-notation.html b/mathml/presentation-markup/menclose/legacy-menclose-radical-notation.html
index 9b71389e74dd11..353202fd7b824d 100644
--- a/mathml/presentation-markup/menclose/legacy-menclose-radical-notation.html
+++ b/mathml/presentation-markup/menclose/legacy-menclose-radical-notation.html
@@ -4,7 +4,7 @@
     <meta charset="utf-8"/>
     <title>Legacy menclose radical notation</title>
     <link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
-    <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+    <link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
     <meta name="assert" content="Verify that the legacy menclose radical notation is ignored.">
     <link rel="match" href="legacy-menclose-radical-notation-ref.html">
     <link rel="stylesheet" type="text/css" href="/fonts/ahem.css" />
diff --git a/mathml/presentation-markup/mrow/inferred-mrow-baseline.html b/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
index c92cbba922f0c1..76d35d125ec260 100644
--- a/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
+++ b/mathml/presentation-markup/mrow/inferred-mrow-baseline.html
@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <meta name="assert" content="Baseline for mrow-like elements is correct.">
 <script src="/mathml/support/feature-detection.js"></script>
@@ -41,6 +41,7 @@
     <math><merror><mspace id="aboveError" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowError" width="10px" depth="30px" style="background: blue"></mspace></merror></math>
     <math><mphantom><mspace style="visibility: visible;" id="abovePhantom" width="10px" height="30px" style="background: purple"></mspace><mspace style="visibility: visible;" id="belowPhantom" width="10px" depth="30px" style="background: blue"></mspace></mphantom></math>
     <math><mspace id="aboveMath" width="10px" height="30px" style="background: purple"></mspace><mspace id="belowMath" width="10px" depth="30px" style="background: blue"></mspace></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose notation="box"><mspace id="aboveMenclose" width="10px" height="30px" style="background: purple"
 ></mspace><mspace id="belowMenclose" width="10px" depth="30px" style="background: blue"></mspace></menclose></math>
     <math><mpadded lspace="10px"><mspace id="aboveMpadded" width="10px" height="30px" style="background: purple"
diff --git a/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html b/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
index 4b89dd6fa5f0da..3182fba0eaf48d 100644
--- a/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
+++ b/mathml/presentation-markup/mrow/inferred-mrow-stretchy.html
@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <meta name="assert" content="Operators can stretch inside mrow-like elements.">
@@ -51,6 +51,7 @@
     <math><merror><mo id="moError">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></merror></math>
     <math><mphantom><mo style="visibilty: visible;" id="moPhantom">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mphantom></math>
     <math><mo id="moMath">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose notation="box"><mo id="moMenclose">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></menclose></math>
     <math><mpadded lspace="10px"><mo id="moMpadded">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></mpadded></math>
     <math><unknown><mo id="moUnknown">&#x21A8;</mo><mspace width="1px" height="100px" style="background: magenta"></mspace></unknown></math>
diff --git a/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html b/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
index 0de9a90eed9de0..bfc04adb9055e7 100644
--- a/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
+++ b/mathml/presentation-markup/mrow/legacy-mstyle-attributes.html
@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#fractions-mfrac">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#string-literal-ms">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <meta name="assert" content="Legacy mstyle attributes are ignored">
 <script src="/resources/testharness.js"></script>
 <script src="/resources/testharnessreport.js"></script>
@@ -135,6 +135,7 @@
       </mstyle>
     </math>
   </p>
+  <!-- notation attribute is from MathML3's menclose element -->
   <p class="TestContainer" id="menclose">
     <math>
       <mstyle notation="box">
diff --git a/mathml/presentation-markup/mrow/spacing.html b/mathml/presentation-markup/mrow/spacing.html
index 4bdfc9a001a3fa..0ff7bae5b00fd7 100644
--- a/mathml/presentation-markup/mrow/spacing.html
+++ b/mathml/presentation-markup/mrow/spacing.html
@@ -9,7 +9,7 @@
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#error-message-merror">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#making-sub-expressions-invisible-mphantom">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#the-top-level-math-element">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
+<link rel="help" href="https://www.w3.org/TR/MathML3/chapter3.html#presm.menclose">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#adjust-space-around-content-mpadded">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#operator-fence-separator-or-accent-mo">
 <meta name="assert" content="Spacing is added around operators inside mrow-like elements.">
@@ -43,6 +43,7 @@
     <math><merror id="Error"><mn>1</mn><mo lspace="50px"></mo><mn>2</mn></merror></math>
     <math><mphantom id="Phantom"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></mphantom></math>
     <math id="Math"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></math>
+    <!-- menclose is treated as <unknown> in MathML Core -->
     <math><menclose id="Menclose" notation="box"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></menclose></math>
     <math><mpadded id="Mpadded" lspace="10px"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></mpadded></math>
     <math><unknown id="Unknown"><mn>1</mn><mo lspace="50px">|</mo><mn>2</mn></unknown></math>
diff --git a/mathml/relations/css-styling/color-004-ref.html b/mathml/relations/css-styling/color-004.tentative-ref.html
similarity index 100%
rename from mathml/relations/css-styling/color-004-ref.html
rename to mathml/relations/css-styling/color-004.tentative-ref.html
diff --git a/mathml/relations/css-styling/color-004.html b/mathml/relations/css-styling/color-004.tentative.html
similarity index 95%
rename from mathml/relations/css-styling/color-004.html
rename to mathml/relations/css-styling/color-004.tentative.html
index 251cd0530fbe78..d5a984f6e7e9c6 100644
--- a/mathml/relations/css-styling/color-004.html
+++ b/mathml/relations/css-styling/color-004.tentative.html
@@ -5,8 +5,8 @@
 <title>color</title>
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#css-styling">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#text-mtext">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
-<link rel="match" href="color-004-ref.html"/>
+<link rel="help" href="https://github.com/mathml-refresh/mathml-core/pull/24">
+<link rel="match" href="color-004.tentative-ref.html"/>
 <meta name="assert" content="Verify that the color is used for text and graphical elements of the menclose element.">
 </head>
 <body>
diff --git a/mathml/relations/css-styling/visibility-004-ref.html b/mathml/relations/css-styling/visibility-004.tentative-ref.html
similarity index 100%
rename from mathml/relations/css-styling/visibility-004-ref.html
rename to mathml/relations/css-styling/visibility-004.tentative-ref.html
diff --git a/mathml/relations/css-styling/visibility-004.html b/mathml/relations/css-styling/visibility-004.tentative.html
similarity index 95%
rename from mathml/relations/css-styling/visibility-004.html
rename to mathml/relations/css-styling/visibility-004.tentative.html
index ed4a4aeb09d53c..41d8da63312408 100644
--- a/mathml/relations/css-styling/visibility-004.html
+++ b/mathml/relations/css-styling/visibility-004.tentative.html
@@ -5,8 +5,8 @@
 <title>visibility</title>
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#css-styling">
 <link rel="help" href="https://mathml-refresh.github.io/mathml-core/#text-mtext">
-<link rel="help" href="https://mathml-refresh.github.io/mathml-core/#enclose-expression-inside-notation-menclose">
-<link rel="match" href="visibility-004-ref.html"/>
+<link rel="help" href="https://github.com/mathml-refresh/mathml-core/pull/24">
+<link rel="match" href="visibility-004.tentative-ref.html"/>
 <meta name="assert" content="Verify that visibility=hidden is used for the text and graphical elements of the menclose element.">
 </head>
 <body>