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/feed.t b/t/feed.t
index 71cbb735..73b7d0bb 100644
--- a/t/feed.t
+++ b/t/feed.t
@@ -15,7 +15,7 @@ sub string_feed {
         stream_to_string(PublicInbox::Feed::generate($_[0]));
 }
 
-my $tmpdir = tempdir(CLEANUP => 1);
+my $tmpdir = tempdir('pi-feed-XXXXXX', TMPDIR => 1, CLEANUP => 1);
 my $git_dir = "$tmpdir/gittest";
 
 {