Index: src/wp-content/themes/twentyfifteen/css/editor-style.css
===================================================================
--- src/wp-content/themes/twentyfifteen/css/editor-style.css	(revision 29902)
+++ src/wp-content/themes/twentyfifteen/css/editor-style.css	(working copy)
@@ -29,7 +29,7 @@
 
 body {
 	color: #333;
-	font-family: "Noto Serif", sans-serif;
+	font-family: "Noto Serif", serif;
 	font-weight: 400;
 	line-height: 1.6842;
 	margin: 83px 0 83px 83px;
@@ -274,7 +274,7 @@
 .mce-item-table th,
 .mce-item-table caption {
 	border-width: 0 1px 1px 0;
-	font-family: "Noto Serif", sans-serif;
+	font-family: "Noto Serif", serif;
 	font-size: 19px;
 	font-weight: 700;
 	padding: 8px;
@@ -284,7 +284,7 @@
 
 .mce-item-table td {
 	border-width: 0 1px 1px 0;
-	font-family: "Noto Serif", sans-serif;
+	font-family: "Noto Serif", serif;
 	font-size: 19px;
 	padding: 8px;
 	vertical-align: baseline;
@@ -488,4 +488,4 @@
 
 .rtl .wp-caption.alignleft {
 	margin: 8px 32px 8px 0;
-}
\ No newline at end of file
+}