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-rw-r--r--test/ruby/test_literal.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/ruby/test_literal.rb b/test/ruby/test_literal.rb
index a736874024..00adbff731 100644
--- a/test/ruby/test_literal.rb
+++ b/test/ruby/test_literal.rb
@@ -498,6 +498,7 @@ class TestRubyLiteral < Test::Unit::TestCase
'//',
'__LINE__',
'__FILE__',
+ '__ENCODING__',
) do |key|
assert_warning(/key #{Regexp.quote(eval(key).inspect)} is duplicated/) { eval("{#{key} => :bar, #{key} => :foo}") }
end