1 files changed, 1 insertions, 1 deletions
diff --git a/testing/web-platform/tests/css/css-contain/reference/contain-layout-button-001-ref.html b/testing/web-platform/tests/css/css-contain/reference/contain-layout-button-001-ref.html
index da83204dce..c20efbbb39 100644
--- a/testing/web-platform/tests/css/css-contain/reference/contain-layout-button-001-ref.html
+++ b/testing/web-platform/tests/css/css-contain/reference/contain-layout-button-001-ref.html
@@ -7,7 +7,7 @@ div.fakeButton {
   display: inline-block;
   border: 5px solid green;
   padding: 0;
-  margin-bottom: 2px;
+  margin-bottom: -5px;
   color: transparent;
   width: 0;
   height: 0px;