diff --git a/layout/reftests/bugs/482592-1-ref.html b/layout/reftests/bugs/482592-1-ref.html
index 188c7b279a1a..7abe1a7c5582 100644
--- a/layout/reftests/bugs/482592-1-ref.html
+++ b/layout/reftests/bugs/482592-1-ref.html
@@ -1,6 +1,6 @@
 <!DOCTYPE html>
 <html>
-  <body>
+  <body style="font-size: 300%">
     xy
   </body>
 </html>
diff --git a/layout/reftests/bugs/482592-1a.xhtml b/layout/reftests/bugs/482592-1a.xhtml
index f87c211b9c33..69c8f7937e4d 100644
--- a/layout/reftests/bugs/482592-1a.xhtml
+++ b/layout/reftests/bugs/482592-1a.xhtml
@@ -22,6 +22,6 @@
     </script>
   </head>
   <body onload="doTest()">
-    <div style="-moz-binding: url(#a)"><span id="l"></span></div>
+    <div style="-moz-binding: url(#a); font-size: 300%;"><span id="l"></span></div>
   </body>
 </html>
diff --git a/layout/reftests/bugs/482592-1b.xhtml b/layout/reftests/bugs/482592-1b.xhtml
index 8e0b60f319df..29d43302b76c 100644
--- a/layout/reftests/bugs/482592-1b.xhtml
+++ b/layout/reftests/bugs/482592-1b.xhtml
@@ -21,6 +21,6 @@
     </script>
   </head>
   <body onload="doTest()">
-    <div style="-moz-binding: url(#a)"><span id="l"></span></div>
+    <div style="-moz-binding: url(#a); font-size: 300%;"><span id="l"></span></div>
   </body>
 </html>
diff --git a/layout/reftests/bugs/621918-1-ref.svg b/layout/reftests/bugs/621918-1-ref.svg
index 6c0c679ddda9..995a4bbfd356 100644
--- a/layout/reftests/bugs/621918-1-ref.svg
+++ b/layout/reftests/bugs/621918-1-ref.svg
@@ -3,8 +3,8 @@
    xmlns:xlink="http://www.w3.org/1999/xlink"
    height="800px"
    width="800px">
-  <text style="font-size:24px;" transform="translate(40,100)">
+  <text style="font-size:48px;" transform="translate(40,100)">
     <tspan>Fire&#x301;fo&#x302;x</tspan></text>
-  <text style="font-size:24px;" transform="translate(40,140) rotate(45)">
+  <text style="font-size:48px;" transform="translate(40,140) rotate(45)">
     <tspan>Fire&#x301;fo&#x302;x</tspan></text>
 </svg>
diff --git a/layout/reftests/bugs/621918-1.svg b/layout/reftests/bugs/621918-1.svg
index 2e9662d45684..821c24f5e082 100644
--- a/layout/reftests/bugs/621918-1.svg
+++ b/layout/reftests/bugs/621918-1.svg
@@ -3,9 +3,9 @@
    xmlns:xlink="http://www.w3.org/1999/xlink"
    height="800px"
    width="800px">
-  <text style="font-size:24px;" transform="translate(40,100)">
+  <text style="font-size:48px;" transform="translate(40,100)">
     <tspan>Fire&#x301;fo&#x302;x</tspan></text>
   <path id="path1" d="M 0,0 L 500,500"/>
-  <text style="font-size:24px;" transform="translate(40,140)"><textPath xlink:href="#path1">
+  <text style="font-size:48px;" transform="translate(40,140)"><textPath xlink:href="#path1">
     <tspan>Fire&#x301;fo&#x302;x</tspan></textPath></text>
 </svg>
