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-rw-r--r--activemodel/test/models/book.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/activemodel/test/models/book.rb b/activemodel/test/models/book.rb
index c5c19046c8..95b2a25962 100644
--- a/activemodel/test/models/book.rb
+++ b/activemodel/test/models/book.rb
@@ -1,3 +1,3 @@
-class Book < Hash
+class Book < ActiveSupport::OrderedHash
include ActiveModel::Validations
end