diff --git src/wp-admin/css/common.css src/wp-admin/css/common.css
index 8224b4345d..f989f518f8 100644
--- src/wp-admin/css/common.css
+++ src/wp-admin/css/common.css
@@ -3058,6 +3058,9 @@ img {
 #templateside ul ul {
 	padding-left: 12px;
 }
+#templateside > ul > li > ul[role=group] {
+	padding-left: 0;
+}
 
 /*
  * Styles for Theme and Plugin editors.
diff --git src/wp-admin/plugin-editor.php src/wp-admin/plugin-editor.php
index 07de92ca09..e462da995a 100644
--- src/wp-admin/plugin-editor.php
+++ src/wp-admin/plugin-editor.php
@@ -242,11 +242,8 @@ if ( 'POST' === $_SERVER['REQUEST_METHOD'] ) {
 	}
 	?>
 	<ul role="tree" aria-labelledby="plugin-files-label">
-	<li role="treeitem" tabindex="-1" aria-expanded="true"
-		aria-level="1"
-		aria-posinset="1"
-		aria-setsize="1">
-		<ul role="group" style="padding-left: 0;">
+	<li role="treeitem" tabindex="-1" aria-expanded="true" aria-level="1" aria-posinset="1" aria-setsize="1">
+		<ul role="group">
 			<?php wp_print_plugin_file_tree( wp_make_plugin_file_tree( $plugin_editable_files ) ); ?>
 		</ul>
 	</ul>
diff --git src/wp-admin/theme-editor.php src/wp-admin/theme-editor.php
index 0487e2d660..25042bb5cb 100644
--- src/wp-admin/theme-editor.php
+++ src/wp-admin/theme-editor.php
@@ -229,11 +229,8 @@ if ( $theme->errors() )
 	endif;
 	?>
 	<ul role="tree" aria-labelledby="theme-files-label">
-		<li role="treeitem" tabindex="-1" aria-expanded="true"
-			aria-level="1"
-			aria-posinset="1"
-			aria-setsize="1">
-			<ul role="group" style="padding-left: 0;">
+		<li role="treeitem" tabindex="-1" aria-expanded="true" aria-level="1" aria-posinset="1" aria-setsize="1">
+			<ul role="group">
 				<?php wp_print_theme_file_tree( wp_make_theme_file_tree( $allowed_files ) ); ?>
 			</ul>
 		</li>