diff --git a/packages/block-editor/src/components/iframe/content.scss b/packages/block-editor/src/components/iframe/content.scss
index 0e7ee7e59d5fe9..66e7e1071c5261 100644
--- a/packages/block-editor/src/components/iframe/content.scss
+++ b/packages/block-editor/src/components/iframe/content.scss
@@ -1,6 +1,5 @@
 .block-editor-iframe__body {
 	position: relative;
-	border: 0.01px solid transparent;
 }
 
 .block-editor-iframe__container {
@@ -50,6 +49,8 @@
 
 	body {
 		min-height: calc((#{$inner-height} - #{$total-frame-height}) / #{$scale});
+		display: flex;
+		flex-direction: column;
 
 		> .is-root-container:not(.wp-block-post-content) {
 			flex: 1;