1 files changed, 3 insertions, 1 deletions
diff --git a/activemodel/test/models/custom_reader.rb b/activemodel/test/models/custom_reader.rb
index 2fbcf79c3d..df605e93d9 100644
--- a/activemodel/test/models/custom_reader.rb
+++ b/activemodel/test/models/custom_reader.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CustomReader
   include ActiveModel::Validations
 
@@ -12,4 +14,4 @@ class CustomReader
   def read_attribute_for_validation(key)
     @data[key]
   end
-end
-\ No newline at end of file
+end