diff --git a/tests/ref/inline_hypothetical_box_a.html b/tests/ref/inline_hypothetical_box_a.html
index 952cbaced14..3b07324daa6 100644
--- a/tests/ref/inline_hypothetical_box_a.html
+++ b/tests/ref/inline_hypothetical_box_a.html
@@ -9,6 +9,7 @@
 
 .b {
     position: absolute;
+    vertical-align: top;
 }
 
 .c {