ttytest2.gemspec in ttytest2-0.9.10 vs ttytest2.gemspec in ttytest2-0.9.11

@@ -24,8 +24,9 @@
 
   spec.required_ruby_version = '>= 3.2.3'
 
   spec.add_development_dependency 'bundler', '~> 2.4'
   spec.add_development_dependency 'minitest', '~> 5.0'
+  spec.add_development_dependency 'open3', '~> 0.2'
   spec.add_development_dependency 'rake', '~> 13.0'
   spec.add_development_dependency 'yard', '~> 0.9'
 end