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-rw-r--r--actionpack/test/abstract/abstract_controller_test.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionpack/test/abstract/abstract_controller_test.rb b/actionpack/test/abstract/abstract_controller_test.rb
index a59a9a3767..30d6a7ae14 100644
--- a/actionpack/test/abstract/abstract_controller_test.rb
+++ b/actionpack/test/abstract/abstract_controller_test.rb
@@ -1,4 +1,5 @@
require 'abstract_unit'
+require 'set'
module AbstractController
module Testing