diff --git a/Gruntfile.js b/Gruntfile.js
index f6fbad19..ea9a15ab 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -15,7 +15,7 @@ module.exports = function ( grunt ) {
 		},
 		stylelint: {
 			all: [
-				'**/*.css',
+				'**/*.{css,less}',
 				'!node_modules/**',
 				'!vendor/**'
 			]
diff --git a/modules/totp/ext.oath.showqrcode.styles.less b/modules/totp/ext.oath.showqrcode.styles.less
index 0484f947..ef5ba958 100644
--- a/modules/totp/ext.oath.showqrcode.styles.less
+++ b/modules/totp/ext.oath.showqrcode.styles.less
@@ -1,4 +1,4 @@
-@import "mediawiki.skin.variables.less";
+@import 'mediawiki.skin.variables.less';
 
 kbd {
 	font-family: monospace, monospace;
@@ -13,6 +13,7 @@ fieldset {
 .cdx-button.mw-oathauth-recoverycodes-download {
 	margin-top: 1em;
 }
+
 .mw-oathauth-recoverycodes-download-icon {
 	.cdx-mixin-css-icon( @cdx-icon-download, @param-is-button-icon: true );
 }