diff --git a/services/web/app/src/Features/Project/ProjectController.js b/services/web/app/src/Features/Project/ProjectController.js
index 6c8d578807..2841ef1d6c 100644
--- a/services/web/app/src/Features/Project/ProjectController.js
+++ b/services/web/app/src/Features/Project/ProjectController.js
@@ -678,6 +678,17 @@ const ProjectController = {
             }
           )
         },
+        writefullIntegrationAssignment(cb) {
+          SplitTestHandler.getAssignment(
+            req,
+            res,
+            'writefull-integration',
+            () => {
+              // We'll pick up the assignment from the res.locals assignment.
+              cb()
+            }
+          )
+        },
         projectTags(cb) {
           if (!userId) {
             return cb(null, [])
diff --git a/services/web/app/views/project/editor/meta.pug b/services/web/app/views/project/editor/meta.pug
index 3530cbba0d..1ad0ad39a4 100644
--- a/services/web/app/views/project/editor/meta.pug
+++ b/services/web/app/views/project/editor/meta.pug
@@ -45,3 +45,5 @@ meta(name="ol-fileActionI18n" data-type="json" content=fileActionI18n)
 
 if (settings.overleaf != null)
 	meta(name="ol-overallThemes" data-type="json" content=overallThemes)
+
+!= moduleIncludes("editor:meta", locals)