--- a/layout/reftests/css-grid/grid-fragmentation-006-ref.html
+++ b/layout/reftests/css-grid/grid-fragmentation-006-ref.html
@@ -63,22 +63,24 @@ i { display:block; height:10px; margin-t
 
 <div class="columns" style="height: 100px/*item will be INCOMPLETE*/">
 <div style="background:grey">
 <div class="grid">
 <span style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span>
 </div>
 </div></div>
 
+<!-- bug 1415301
 <div class="columns" style="height: 140px/*trigger IsInlineBreakBefore() for the item*/">
 <div style="padding-top:30px; background:grey">
 <div class="grid">
 <span style="grid-row:span 3"><x></x></span>
 <span style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span></div>
 </div></div>
+-->
 
 <div class="columns" style="height: 100px/*trigger IsInlineBreakBefore() for the item*/">
 <div style="padding-top:1px; background:grey">
 <div class="grid t" style="grid-auto-rows: 50px; height:50px;">
 <span class="t" style="grid-row:span 2; height:49px; overflow:hidden"><i></i><i></i><i></i><x></x></span>
 </div>
 <div style="height:44px"></div>
 <div class="grid b" style="grid-auto-rows: 50px; height:50px;">

--- a/layout/reftests/css-grid/grid-fragmentation-006.html
+++ b/layout/reftests/css-grid/grid-fragmentation-006.html
@@ -62,22 +62,24 @@ i { display:block; height:10px; margin-t
 
 <div class="columns" style="height: 100px/*item will be INCOMPLETE*/">
 <div style="background:grey">
 <div class="grid">
 <span class="avoid-break" style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span>
 </div>
 </div></div>
 
+<!-- bug 1415301
 <div class="columns" style="height: 140px/*trigger IsInlineBreakBefore() for the item*/">
 <div style="padding-top:30px; background:grey">
 <div class="grid">
 <span style="grid-row:span 3"><x></x></span>
 <span class="avoid-break" style="grid-row:span 2"><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><i></i><x></x></span></div>
 </div></div>
+-->
 
 <div class="columns" style="height: 100px/*trigger IsInlineBreakBefore() for the item*/">
 <div style="padding-top:1px; background:grey">
 <div class="grid" style="grid-auto-rows: 50px;">
 <span class="avoid-break" style="grid-row:span 2; height:60px"><i></i><i></i><i></i><x></x></span>
 </div>
 </div></div>