diff --git a/services/web/app/src/Features/Project/ProjectController.js b/services/web/app/src/Features/Project/ProjectController.js
index 117030ba49..dc8f5bdd36 100644
--- a/services/web/app/src/Features/Project/ProjectController.js
+++ b/services/web/app/src/Features/Project/ProjectController.js
@@ -766,6 +766,9 @@ const ProjectController = {
             }
             metrics.inc(metricName)
 
+            const enableOptimize =
+              !!Settings.experimentId && !user.features.zotero
+
             res.render('project/editor', {
               title: project.name,
               priority_title: true,
@@ -822,7 +825,8 @@ const ProjectController = {
               allowedImageNames,
               gitBridgePublicBaseUrl: Settings.gitBridgePublicBaseUrl,
               wsUrl,
-              showSupport: Features.hasFeature('support')
+              showSupport: Features.hasFeature('support'),
+              gaOptimize: enableOptimize
             })
             timer.done()
           }
diff --git a/services/web/app/src/infrastructure/ExpressLocals.js b/services/web/app/src/infrastructure/ExpressLocals.js
index 9ec9a1c0e2..914632912d 100644
--- a/services/web/app/src/infrastructure/ExpressLocals.js
+++ b/services/web/app/src/infrastructure/ExpressLocals.js
@@ -354,6 +354,7 @@ module.exports = function(webRouter, privateApiRouter, publicApiRouter) {
 
   webRouter.use(function(req, res, next) {
     res.locals.ExposedSettings = {
+      experimentId: Settings.experimentId,
       isOverleaf: Settings.overleaf != null,
       appName: Settings.appName,
       hasSamlBeta: req.session.samlBeta,
diff --git a/services/web/app/views/layout.pug b/services/web/app/views/layout.pug
index 811b9e974b..b1f468da6b 100644
--- a/services/web/app/views/layout.pug
+++ b/services/web/app/views/layout.pug
@@ -43,14 +43,16 @@ html(
 				script(type='text/javascript').
 					ga('require', '#{gaOptimizeId}')
 					ga('send', 'event', 'pageview',  document.title.substring(0, 499), window.location.href.substring(0, 499))
-				//- Anti-flicker snippet
-				style(type='text/css') .async-hide { opacity: 0 !important}
-				script(type='text/javascript').
-					(function(a,s,y,n,c,h,i,d,e){s.className+=' '+y;h.start=1*new Date;
-					h.end=i=function(){s.className=s.className.replace(RegExp(' ?'+y),'')};
-					(a[n]=a[n]||[]).hide=h;setTimeout(function(){i();h.end=null},c);h.timeout=c;
-					})(window,document.documentElement,'async-hide','dataLayer',4000,
-					{'#{gaOptimizeId}':true});
+				if !experimentId
+					//- Anti-flicker snippet
+					//- Only run for tests controlled by Optimize editor
+					style(type='text/css') .async-hide { opacity: 0 !important}
+					script(type='text/javascript').
+						(function(a,s,y,n,c,h,i,d,e){s.className+=' '+y;h.start=1*new Date;
+						h.end=i=function(){s.className=s.className.replace(RegExp(' ?'+y),'')};
+						(a[n]=a[n]||[]).hide=h;setTimeout(function(){i();h.end=null},c);h.timeout=c;
+						})(window,document.documentElement,'async-hide','dataLayer',4000,
+						{'#{gaOptimizeId}':true});
 
 		- else
 			script(type='text/javascript').