diff --git a/src/wp-admin/css/about.css b/src/wp-admin/css/about.css
index 58e7890d94..5aa18d2740 100644
--- a/src/wp-admin/css/about.css
+++ b/src/wp-admin/css/about.css
@@ -96,6 +96,7 @@
 
 .about-wrap h1 {
 	margin: 0.2em 200px 0 0;
+	padding: 0;
 	color: #32373c;
 	line-height: 1.2em;
 	font-size: 2.8em;
diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index 4ec6e9d803..2880015271 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -1926,6 +1926,7 @@ html.wp-toolbar {
 	color: #000;
 }
 
+h1.nav-tab-wrapper,
 h2.nav-tab-wrapper,
 h3.nav-tab-wrapper {
 	border-bottom: 1px solid #ccc;
@@ -1933,6 +1934,7 @@ h3.nav-tab-wrapper {
 	padding-left: 10px;
 }
 
+h1 .nav-tab,
 h2 .nav-tab {
 	padding: 6px 10px;
 	font-weight: bold;
diff --git a/src/wp-admin/css/edit.css b/src/wp-admin/css/edit.css
index 9e5362813d..b25655fcb8 100644
--- a/src/wp-admin/css/edit.css
+++ b/src/wp-admin/css/edit.css
@@ -1213,7 +1213,7 @@ table.links-table {
 	display: inline-block;
 }
 
-.focus-on .wrap > h2,
+.focus-on .wrap > h1,
 .focus-on #wpfooter,
 .focus-on .postbox-container > *,
 .focus-on div.updated,
@@ -1235,7 +1235,7 @@ table.links-table {
 	opacity: 0.3;
 }
 
-.focus-off .wrap > h2,
+.focus-off .wrap > h1,
 .focus-off #wpfooter,
 .focus-off .postbox-container > *,
 .focus-off div.updated,
diff --git a/src/wp-admin/css/themes.css b/src/wp-admin/css/themes.css
index 7fd5e74d3d..8e62cb8e24 100644
--- a/src/wp-admin/css/themes.css
+++ b/src/wp-admin/css/themes.css
@@ -1022,7 +1022,7 @@ body.folded .theme-overlay .theme-wrap {
 		font-size: 13px;
 	}
 
-	.themes-php .wrap h2 {
+	.themes-php .wrap h1 {
 		width: 100%;
 	}