diff --git a/resources/skins.minerva.scripts/init.js b/resources/skins.minerva.scripts/init.js
index 3106a1d..39a3ccf 100644
--- a/resources/skins.minerva.scripts/init.js
+++ b/resources/skins.minerva.scripts/init.js
@@ -3,6 +3,7 @@
 		toast = M.require( 'mobile.startup/toast' ),
 		time = M.require( 'mobile.startup/time' ),
 		skin = M.require( 'mobile.init/skin' ),
+		subscribeToWikimediaEvents = M.require( 'skins.minerva.scripts/subscribeToWikimediaEvents' ),
 		issues = M.require( 'skins.minerva.scripts/pageIssues' ),
 		DownloadIcon = M.require( 'skins.minerva.scripts/DownloadIcon' ),
 		browser = M.require( 'mobile.startup/Browser' ).getSingleton(),
@@ -289,6 +290,9 @@
 		if ( !page.isMissing ) {
 			issues.init( overlayManager, page );
 		}
+		// it's important this runs after issues.init - at which point the A/B test
+		// has been initialised, and we can turn on ReadingDepth safely.
+		subscribeToWikimediaEvents();
 	} );
 
 	M.define( 'skins.minerva.scripts/overlayManager', overlayManager );
diff --git a/resources/skins.minerva.scripts/initLogging.js b/resources/skins.minerva.scripts/initLogging.js
index e7dfc5b..c7599af 100644
--- a/resources/skins.minerva.scripts/initLogging.js
+++ b/resources/skins.minerva.scripts/initLogging.js
@@ -3,7 +3,16 @@
 ( function ( M, $ ) {
 	var mainMenu = M.require( 'skins.minerva.scripts.top/mainMenu' );
 
+	/**
+	 * Enable WikimediaEvents including ReadingDepth schema
+	 */
+	function subscribeToWikimediaEvents() {
+		mw.loader.using( 'ext.wikimediaEvents' );
+	}
+
 	$( function () {
 		mainMenu.enableLogging();
 	} );
+
+	M.define( 'skins.minerva.scripts/subscribeToWikimediaEvents', subscribeToWikimediaEvents );
 }( mw.mobileFrontend, jQuery ) );
diff --git a/skin.json b/skin.json
index 453ca23..13b129e 100644
--- a/skin.json
+++ b/skin.json
@@ -424,6 +424,7 @@
 			},
 			"scripts": [
 				"resources/skins.minerva.scripts/errorLogging.js",
+				"resources/skins.minerva.scripts/initLogging.js",
 				"resources/skins.minerva.scripts/preInit.js",
 				"resources/skins.minerva.scripts/DownloadIcon.js",
 				"resources/skins.minerva.scripts/pageIssuesLogger.js",
@@ -432,7 +433,6 @@
 				"resources/skins.minerva.scripts/PageIssuesOverlay.js",
 				"resources/skins.minerva.scripts/pageIssues.js",
 				"resources/skins.minerva.scripts/init.js",
-				"resources/skins.minerva.scripts/initLogging.js",
 				"resources/skins.minerva.scripts/mobileRedirect.js",
 				"resources/skins.minerva.scripts/search.js",
 				"resources/skins.minerva.scripts/references.js"