diff --git a/qa/acceptance/spec/shared_examples/cli/logstash-plugin/list.rb b/qa/acceptance/spec/shared_examples/cli/logstash-plugin/list.rb
index 026897c69..e8e0d1dac 100644
--- a/qa/acceptance/spec/shared_examples/cli/logstash-plugin/list.rb
+++ b/qa/acceptance/spec/shared_examples/cli/logstash-plugin/list.rb
@@ -31,6 +31,7 @@ shared_examples "logstash list" do |logstash|
         result = logstash.run_command_in_path("bin/logstash-plugin list --verbose")
 
         stdout = StringIO.new(result.stdout)
+        stdout.set_encoding(Encoding::UTF_8)
         while line = stdout.gets
           expect(line).to match(/^#{plugin_name_with_version}$/)