Inflections#plurals, singulars, uncountables, humans, acronyms are public attr_readers

activesupport/lib/active_support/inflector/inflections.rb

@@ -76,7 +76,7 @@ module ActiveSupport
       # Private, for the test suite.
       def initialize_dup(orig) # :nodoc:
         %w(plurals singulars uncountables humans acronyms).each do |scope|
-          instance_variable_set("@#{scope}", orig.send(scope).dup)
+          instance_variable_set("@#{scope}", orig.public_send(scope).dup)
         end
         define_acronym_regex_patterns
       end

activesupport/test/inflector_test.rb

@@ -560,7 +560,7 @@ class InflectorTest < ActiveSupport::TestCase
       # clear the inflections
       ActiveSupport::Inflector.inflections do |inflect|
         inflect.clear(scope)
-        assert_equal [], inflect.send(scope)
+        assert_equal [], inflect.public_send(scope)
       end
     end
   end