diff --git a/config/initializers/ab_tests.rb b/config/initializers/ab_tests.rb
index c3b33a45119..5a970f79907 100644
--- a/config/initializers/ab_tests.rb
+++ b/config/initializers/ab_tests.rb
@@ -78,7 +78,7 @@ def self.all
     elsif user
       user.uuid
     else
-      SecureRandom.gen_random(1)
+      SecureRandom.alphanumeric(8)
     end
   end.freeze
 end