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-rw-r--r--spec/ruby/core/encoding/converter/new_spec.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/spec/ruby/core/encoding/converter/new_spec.rb b/spec/ruby/core/encoding/converter/new_spec.rb
index 1f7affc72b..db9c3364d7 100644
--- a/spec/ruby/core/encoding/converter/new_spec.rb
+++ b/spec/ruby/core/encoding/converter/new_spec.rb
@@ -107,7 +107,7 @@ describe "Encoding::Converter.new" do
it "sets the replacement String to '\\uFFFD'" do
conv = Encoding::Converter.new("us-ascii", "utf-8", replace: nil)
- conv.replacement.should == "\u{fffd}".force_encoding("utf-8")
+ conv.replacement.should == "\u{fffd}".dup.force_encoding("utf-8")
end
it "sets the replacement String encoding to UTF-8" do