diff --git a/README.md b/README.md
index ff0bfa4..e40b3d4 100644
--- a/README.md
+++ b/README.md
@@ -122,11 +122,11 @@ Group membership can be debugged from the console via:
 
 ```js
   const AB = mw.mobileFrontend.require('skins.minerva.scripts/AB')
-  new AB(
-    'WME.PageIssuesAB',
-    mw.config.get( 'wgMinervaABSamplingRate', 0 ),
-    mw.user.sessionId()
-  ).getBucket()
+  new AB({
+    testName: 'WME.PageIssuesAB',
+    samplingRate: mw.config.get( 'wgMinervaABSamplingRate', 0 ),
+    sessionId: mw.user.sessionId()
+  }).getBucket()
 ```
 
 And since session ID is an input in calculating the group, reassignment occurs
diff --git a/resources/skins.minerva.scripts/AB.js b/resources/skins.minerva.scripts/AB.js
index 701a763..ec3312e 100644
--- a/resources/skins.minerva.scripts/AB.js
+++ b/resources/skins.minerva.scripts/AB.js
@@ -11,14 +11,21 @@
 	/**
 	 * Buckets users based on params and exposes an `isEnabled` and `getBucket` method.
 	 *
-	 * @param {string} testName name of the AB-test.
-	 * @param {number} samplingRate sampling rate for the AB-test.
-	 * @param {number} sessionId session ID for user bucketing.
+	 * @param {Object}   config configuration object for AB test.
+	 * @param {string}   config.testName
+	 * @param {number}   config.samplingRate sampling rate for the AB-test.
+	 * @param {number}   config.sessionId session ID for user bucketing
+	 * @param {function} [config.onABStart] function that triggers event-logging when user is either
+	 *                                      in bucket A or B.
 	 * @constructor
 	 */
-	function AB( testName, samplingRate, sessionId ) {
+	function AB( config ) {
 
 		var CONTROL_BUCKET = 'control',
+			testName = config.testName,
+			samplingRate = config.samplingRate,
+			sessionId = config.sessionId,
+			onABStart = config.onABStart || function () {},
 			test = {
 				name: testName,
 				enabled: !!samplingRate,
@@ -28,13 +35,6 @@
 					B: samplingRate / 2
 				}
 			};
-		/**
-		 * Starts the AB-test and enters the user into the Reading Depth test.
- 		 */
-		function startABTest() {
-			// See: https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/WikimediaEvents/+/437686/
-			mw.track( 'wikimedia.event.ReadingDepthSchema.enable' );
-		}
 
 		/**
 		 * Gets the users AB-test bucket
@@ -61,7 +61,7 @@
 		 */
 		function init() {
 			if ( isEnabled() ) {
-				startABTest();
+				onABStart( getBucket() );
 			}
 		}
 
diff --git a/resources/skins.minerva.scripts/cleanuptemplates.js b/resources/skins.minerva.scripts/cleanuptemplates.js
index dd8d8a5..0686b34 100644
--- a/resources/skins.minerva.scripts/cleanuptemplates.js
+++ b/resources/skins.minerva.scripts/cleanuptemplates.js
@@ -6,11 +6,20 @@
 		NS_MAIN = 0,
 		NS_TALK = 1,
 		NS_CATEGORY = 14,
-		isInGroupB = new AB(
-			'WME.PageIssuesAB',
-			mw.config.get( 'wgMinervaABSamplingRate', 0 ),
-			mw.user.sessionId()
-		).getBucket() === 'B',
+		isInGroupB = new AB( {
+			testName: 'WME.PageIssuesAB',
+			samplingRate: mw.config.get( 'wgMinervaABSamplingRate', 0 ),
+			sessionId: mw.user.sessionId(),
+			onABStart: function ( bucket ) {
+				// See: https://gerrit.wikimedia.org/r/#/c/mediawiki/extensions/WikimediaEvents/+/437686/
+				var READING_DEPTH_BUCKET_KEYS = {
+						A: 'page-issues-a_sample',
+						B: 'page-issues-b_sample'
+					},
+					readingDepthBucket = READING_DEPTH_BUCKET_KEYS[ bucket ];
+				mw.track( 'wikimedia.event.ReadingDepthSchema.enable', readingDepthBucket );
+			}
+		} ).getBucket() === 'B',
 		Icon = M.require( 'mobile.startup/Icon' );
 
 	( function () {
diff --git a/tests/qunit/skins.minerva.scripts/test_AB.js b/tests/qunit/skins.minerva.scripts/test_AB.js
index 755b72b..ee3c79d 100644
--- a/tests/qunit/skins.minerva.scripts/test_AB.js
+++ b/tests/qunit/skins.minerva.scripts/test_AB.js
@@ -1,8 +1,12 @@
 ( function ( M ) {
 
 	var AB = M.require( 'skins.minerva.scripts/AB' ),
-		aBName = 'WME.MinervaABTest',
-		samplingRate = 0.5;
+		util = M.require( 'mobile.startup/util' ),
+		defaultConfig = {
+			testName: 'WME.MinervaABTest',
+			samplingRate: 0.5,
+			sessionId: mw.user.generateRandomSessionId()
+		};
 
 	QUnit.module( 'Minerva AB-test' );
 
@@ -14,10 +18,12 @@
 			},
 			maxUsers = 1000,
 			bucketingTest,
+			config,
 			i;
 
 		for ( i = 0; i < maxUsers; i++ ) {
-			bucketingTest = new AB( aBName, samplingRate, mw.user.generateRandomSessionId() );
+			config = util.extend( {}, defaultConfig, { sessionId: mw.user.generateRandomSessionId() } );
+			bucketingTest = new AB( config );
 			userBuckets[ bucketingTest.getBucket() ] += 1;
 		}