diff --git a/Library/Contributions/cmd/brew-test-bot.rb b/Library/Contributions/cmd/brew-test-bot.rb
index 30436263c3..c1eccb2ffa 100755
--- a/Library/Contributions/cmd/brew-test-bot.rb
+++ b/Library/Contributions/cmd/brew-test-bot.rb
@@ -179,6 +179,7 @@ class Test
       rd.close
       STDERR.reopen("/dev/null")
       STDOUT.reopen(wr)
+      wr.close
       Dir.chdir @repository
       exec("git", *args)
     end