1 files changed, 1 insertions, 1 deletions
diff --git a/t/mda.t b/t/mda.t
index a8e78b38..03bad871 100644
--- a/t/mda.t
+++ b/t/mda.t
@@ -11,7 +11,7 @@ use IPC::Run qw(run);
  
  my $mda = "blib/script/public-inbox-mda";
  my $learn = "blib/script/public-inbox-learn";
-my $tmpdir = tempdir(CLEANUP => 1);
+my $tmpdir = tempdir('pi-mda-XXXXXX', TMPDIR => 1, CLEANUP => 1);
  my $home = "$tmpdir/pi-home";
  my $pi_home = "$home/.public-inbox";
  my $pi_config = "$pi_home/config";