1 files changed, 1 insertions, 1 deletions
diff --git a/t/plack.t b/t/plack.t
index b77cdba5..568f09f0 100644
--- a/t/plack.t
+++ b/t/plack.t
@@ -9,7 +9,7 @@ use Cwd;
  use IPC::Run qw/run/;
  my $psgi = "examples/public-inbox.psgi";
  my $mda = "blib/script/public-inbox-mda";
-my $tmpdir = tempdir(CLEANUP => 1);
+my $tmpdir = tempdir('pi-plack-XXXXXX', TMPDIR => 1, CLEANUP => 1);
  my $home = "$tmpdir/pi-home";
  my $pi_home = "$home/.public-inbox";
  my $pi_config = "$pi_home/config";