diff --git a/test/loading_test_helper.rb b/test/loading_test_helper.rb
index 65f6785a1..8cad1a874 100644
--- a/test/loading_test_helper.rb
+++ b/test/loading_test_helper.rb
@@ -9,6 +9,8 @@
 require "minitest/autorun"
 require "minitest/focus"
 require "mocha/minitest"
+require "active_support"
+require "active_support/testing/parallelize_executor"
 require "active_support/testing/isolation"
 require "support/test_macro"
 require "support/test_assertions"