diff --git a/resources/skins.minerva.mainMenu.styles/mainmenu.less b/resources/skins.minerva.mainMenu.styles/mainmenu.less
index 40fd365..63c90ca 100644
--- a/resources/skins.minerva.mainMenu.styles/mainmenu.less
+++ b/resources/skins.minerva.mainMenu.styles/mainmenu.less
@@ -19,7 +19,7 @@
 	box-shadow: -5px 0 0 0 rgba( 0, 0, 0, 0.3 );
 }
 
-nav {
+#mw-mf-page-left {
 	background-color: @primaryNavBackgroundColor;
 	float: left;
 	min-height: 100%;
@@ -153,7 +153,7 @@ nav {
 .primary-navigation-enabled {
 	background-color: @primaryNavBackgroundColor;
 
-	nav {
+	#mw-mf-page-left {
 		width: @menuWidth;
 	}
 
@@ -197,7 +197,7 @@ nav {
 		.transition-transform( @transition );
 	}
 
-	nav {
+	#mw-mf-page-left {
 		width: @menuWidth;
 
 		.transition( visibility 0s @duration );
@@ -234,7 +234,7 @@ nav {
 		.transform( translate( @menuWidth, 0 ) );
 	}
 
-	nav {
+	#mw-mf-page-left {
 		// make menu scrollable when open (on small screens)
 		position: static;
 		.transition( none );
@@ -266,7 +266,7 @@ nav {
 			}
 		}
 
-		nav {
+		#mw-mf-page-left {
 			width: @menuWidthTablet;
 		}
 
diff --git a/tests/browser/features/support/pages/article_page.rb b/tests/browser/features/support/pages/article_page.rb
index 7502571..2bb01e8 100644
--- a/tests/browser/features/support/pages/article_page.rb
+++ b/tests/browser/features/support/pages/article_page.rb
@@ -15,7 +15,7 @@ class ArticlePage
   a(:beta_mode_indicator, css: '.branding-box sup')
 
   # left nav
-  nav(:navigation, css: 'nav')
+  nav(:navigation, css: '#mw-mf-page-left')
   a(:about_link) { |page| page.navigation_element.link_element(text: /^About/) }
   a(:disclaimer_link) { |page| page.navigation_element.link_element(text: 'Disclaimers') }