diff --git a/layout/reftests/text-decoration/reftest.list b/layout/reftests/text-decoration/reftest.list
index 7509470c7428..60227c8c48b0 100644
--- a/layout/reftests/text-decoration/reftest.list
+++ b/layout/reftests/text-decoration/reftest.list
@@ -77,7 +77,7 @@ fuzzy-if(B2G,255,1) == dynamic-underline-vertical-align-standards-2.html dynamic
 == underline-table-cell-quirks.html underline-table-cell-quirks-ref.html
 != underline-table-cell-quirks.html underline-table-cell-quirks-notref.html
 == underline-block-propagation-quirks.html underline-block-propagation-quirks-ref.html
-fails == underline-block-propagation-2-quirks.html underline-block-propagation-2-quirks-ref.html # same problem as previous line (bug 403524)
+== underline-block-propagation-2-quirks.html underline-block-propagation-2-quirks-ref.html
 == underline-block-standards.html underline-block-standards-ref.html
 != underline-block-standards.html underline-block-standards-notref.html
 == underline-inline-block-standards.html underline-inline-block-standards-ref.html
diff --git a/layout/reftests/text-decoration/underline-block-propagation-2-quirks-ref.html b/layout/reftests/text-decoration/underline-block-propagation-2-quirks-ref.html
index 786239ed9ac4..6f4bc8ecd2a2 100644
--- a/layout/reftests/text-decoration/underline-block-propagation-2-quirks-ref.html
+++ b/layout/reftests/text-decoration/underline-block-propagation-2-quirks-ref.html
@@ -1,5 +1,9 @@
 <html><head>
 <title>More tests of propagation of text-decoration</title>
+<style>
+textarea { -moz-appearance: none }
+textarea + textarea { margin-left: 10px }
+</style>
 </head>
 <body>
 <!-- t-d should not propagate to the content of a form control -->
@@ -10,16 +14,18 @@
 >This text should be struck out.</textarea>
 <p style="text-decoration:underline">This text should also be underlined.</p>
 </form>
-<!-- t-d should propagate from parent elements to table-cells -->
+<!-- t-d should propagate from parent elements to table-cells, except
+     not through a table element in quirks mode, per
+     https://quirks.spec.whatwg.org/#the-text-decoration-doesn't-propagate-into-tables-quirk
+     -->
 <div>
   <table>
     <tr>
       <td>
-	<span style="text-decoration:underline">
 	<span style="text-decoration:overline">
 	<span style="text-decoration:line-through">
-	underlined, overlined, and struck out
-	</span></span></span>
+	overlined, and struck out
+	</span></span>
       </td>
     </tr>
   </table>
diff --git a/layout/reftests/text-decoration/underline-block-propagation-2-quirks.html b/layout/reftests/text-decoration/underline-block-propagation-2-quirks.html
index 7d1bf7e1c671..7e32b7581f53 100644
--- a/layout/reftests/text-decoration/underline-block-propagation-2-quirks.html
+++ b/layout/reftests/text-decoration/underline-block-propagation-2-quirks.html
@@ -1,5 +1,9 @@
 <html><head>
 <title>More tests of propagation of text-decoration</title>
+<style>
+textarea { -moz-appearance: none }
+textarea + textarea { margin-left: 10px }
+</style>
 </head>
 <body>
 <!-- t-d should not propagate to the content of a form control -->
@@ -10,11 +14,14 @@ This text should be underlined.<br>
 >This text should be struck out.</textarea>
 <p>This text should also be underlined.</p>
 </form>
-<!-- t-d should propagate from parent elements to table-cells -->
+<!-- t-d should propagate from parent elements to table-cells, except
+     not through a table element in quirks mode, per
+     https://quirks.spec.whatwg.org/#the-text-decoration-doesn't-propagate-into-tables-quirk
+     -->
 <div style="text-decoration:underline">
   <table style="text-decoration:overline">
     <tr style="text-decoration:line-through">
-      <td>underlined, overlined, and struck out</td>
+      <td>overlined, and struck out</td>
     </tr>
   </table>
 </div>
