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-rw-r--r--activesupport/lib/active_support/testing/parallelization.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/testing/parallelization.rb b/activesupport/lib/active_support/testing/parallelization.rb
index beeb470659..c03a07873d 100644
--- a/activesupport/lib/active_support/testing/parallelization.rb
+++ b/activesupport/lib/active_support/testing/parallelization.rb
@@ -2,6 +2,7 @@
require "drb"
require "drb/unix"
+require "active_support/core_ext/module/attribute_accessors"
module ActiveSupport
module Testing