diff --git a/test/multiverse/lib/multiverse/envfile.rb b/test/multiverse/lib/multiverse/envfile.rb
index 5a67bee74a..f6c484c486 100644
--- a/test/multiverse/lib/multiverse/envfile.rb
+++ b/test/multiverse/lib/multiverse/envfile.rb
@@ -153,7 +153,7 @@ def prepend_rails_edge(gem_version_array = [])
       # NOTE: The Rails Edge version is not tested unless the Ruby version in
       #       play is greater than or equal to (>=) the version number at the
       #       end of the unshifted inner array
-      array.unshift(["github: 'rails'", 3.0])
+      gem_version_array.unshift(["github: 'rails'", 3.0])
     end
 
     # are we running in a CI context intended for PR approvals?