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-rw-r--r--test/psych/test_emitter.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/test/psych/test_emitter.rb b/test/psych/test_emitter.rb
index c90765349a..3738c1ac04 100644
--- a/test/psych/test_emitter.rb
+++ b/test/psych/test_emitter.rb
@@ -6,7 +6,7 @@ module Psych
class TestEmitter < TestCase
def setup
super
- @out = StringIO.new
+ @out = StringIO.new('')
@emitter = Psych::Emitter.new @out
end