diff --git a/test/cli_test.rb b/test/cli_test.rb
index 52e98d4..ef056a4 100644
--- a/test/cli_test.rb
+++ b/test/cli_test.rb
@@ -79,8 +79,8 @@ def test_no_yaml
       def test_version_flag
         read, write = IO.pipe
         # optparse --version immediately call exit so we test in a subprocess
-        pid = fork do 
-          STDOUT.reopen(write)
+        pid = fork do
+          $stdout.reopen(write)
           read.close
           exit(CLI.new(["--version"]).run)
         end