Index: src/wp-admin/css/wp-admin.css
===================================================================
--- src/wp-admin/css/wp-admin.css	(revision 26527)
+++ src/wp-admin/css/wp-admin.css	(working copy)
@@ -12886,12 +12886,14 @@
 		padding: 7px 12px;
 	}
 
+	.interim-login input[type=checkbox],
 	.press-this input[type=checkbox],
 	.press-this input[type=radio] {
 		height: 16px;
 		width: 16px;
 	}
 
+	.interim-login input[type=checkbox]:checked:before,
 	.press-this input[type=checkbox]:checked:before {
 		width: 16px;
 		font: normal 21px/1 'dashicons';