Index: src/wp-content/themes/twentyseventeen/assets/css/blocks.css
===================================================================
--- src/wp-content/themes/twentyseventeen/assets/css/blocks.css	(revision 58124)
+++ src/wp-content/themes/twentyseventeen/assets/css/blocks.css	(working copy)
@@ -364,7 +364,7 @@
 	text-transform: uppercase;
 }
 
-.editor-block-list__block .wp-block-latest-comments__comment-excerpt p {
+.wp-block-latest-comments__comment-excerpt p {
 	font-size: 14px;
 	font-size: 0.875rem;
 }
Index: src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
===================================================================
--- src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css	(revision 58124)
+++ src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css	(working copy)
@@ -771,7 +771,7 @@
 
 /* Latest Comments */
 
-.editor-block-list__block ol.wp-block-latest-comments > li:before {
+.editor-styles-wrapper ol.wp-block-latest-comments > li:before {
 	content: '';
 }
 
@@ -790,7 +790,7 @@
 	margin-bottom: 0.4em;
 }
 
-.editor-block-list__block .wp-block-latest-comments__comment-meta a {
+.editor-styles-wrapper .wp-block-latest-comments__comment-meta a {
 	-webkit-box-shadow: none;
 	box-shadow: none;
 	font-weight: 700;
@@ -806,7 +806,7 @@
 	text-transform: uppercase;
 }
 
-.editor-block-list__block .wp-block-latest-comments__comment-excerpt p {
+.editor-styles-wrapper .wp-block-latest-comments__comment-excerpt p {
 	font-size: 14px;
 	font-size: 0.875rem;
 }