t/*.t: use identifiable tempdir names

This should make identifiying leftover directories
due to SIGKILL-ed tests easier.

1 files changed, 1 insertions, 1 deletions

diff --git a/t/msgmap.t b/t/msgmap.t
index 6a4f4f84..5c28e54d 100644
--- a/t/msgmap.t
+++ b/t/msgmap.t
@@ -11,7 +11,7 @@ foreach my $mod (qw(DBD::SQLite)) {
 }
 
 use_ok 'PublicInbox::Msgmap';
-my $tmpdir = tempdir(CLEANUP => 1);
+my $tmpdir = tempdir('pi-msgmap-XXXXXX', TMPDIR => 1, CLEANUP => 1);
 my $d = PublicInbox::Msgmap->new($tmpdir, 1);
 
 my %mid2num;