diff --git a/lib/Test.pm6 b/lib/Test.pm6
index 8ef52b9d036..6ba89e9f131 100644
--- a/lib/Test.pm6
+++ b/lib/Test.pm6
@@ -39,8 +39,8 @@ my int $done_testing_has_been_run = 0;
 _init_vars();
 
 sub _init_io {
-    nqp::setbuffersizefh(nqp::getstdin(),  0);
     nqp::setbuffersizefh(nqp::getstdout(), 0);
+    nqp::setbuffersizefh(nqp::getstderr(), 0);
     $output         = $PROCESS::OUT;
     $failure_output = $PROCESS::ERR;
     $todo_output    = $PROCESS::OUT;