diff --git a/tests/wpt/mozilla/tests/css/absolute_hypothetical_with_intervening_inline_block_a.html b/tests/wpt/mozilla/tests/css/absolute_hypothetical_with_intervening_inline_block_a.html
index 261dc086101..54d92051775 100644
--- a/tests/wpt/mozilla/tests/css/absolute_hypothetical_with_intervening_inline_block_a.html
+++ b/tests/wpt/mozilla/tests/css/absolute_hypothetical_with_intervening_inline_block_a.html
@@ -18,6 +18,7 @@ section {
 }
 strong {
     color: red;
+    font-weight: normal;
 }
 </style>
 There should be no red.<em><main><section></section></main></em><strong>_</strong>