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-rw-r--r--ext/stringio/stringio.gemspec1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/stringio/stringio.gemspec b/ext/stringio/stringio.gemspec
index c765242f35..d12c648a7d 100644
--- a/ext/stringio/stringio.gemspec
+++ b/ext/stringio/stringio.gemspec
@@ -30,4 +30,5 @@ Gem::Specification.new do |s|
# s.signing_key = File.expand_path("~/.ssh/gem-private_key.pem") if $0 =~ /gem\z/
s.add_development_dependency 'rake-compiler'
+ s.add_development_dependency 'test-unit'
end