t/indexlevels-mirror.t | 1 +
 t/xcpdb-reshard.t      | 1 +

diff --git a/t/indexlevels-mirror.t b/t/indexlevels-mirror.t
index f1c338e189fa5d648ff1532597e95677635fa440..3d4813bec9e814227b3dbc0c8f9480a066d50ce8 100644
--- a/t/indexlevels-mirror.t
+++ b/t/indexlevels-mirror.t
@@ -32,6 +32,7 @@ sub import_index_incremental {
 	my ($v, $level) = @_;
 	my $this = "pi-$v-$level-indexlevels";
 	my ($tmpdir, $for_destroy) = tmpdir();
+	local $ENV{PI_CONFIG} = "$tmpdir/config";
 	my $ibx = PublicInbox::Inbox->new({
 		inboxdir => "$tmpdir/testbox",
 		name => $this,
diff --git a/t/xcpdb-reshard.t b/t/xcpdb-reshard.t
index ebf156a31968a68829c134115f1e969b7e112ed4..a4ab35d6c7a10f386f36c1830564a93e6d55dca4 100644
--- a/t/xcpdb-reshard.t
+++ b/t/xcpdb-reshard.t
@@ -25,6 +25,7 @@ );
 
 my ($this) = (split('/', $0))[-1];
 my ($tmpdir, $for_destroy) = tmpdir();
+local $ENV{PI_CONFIG} = "$tmpdir/config";
 my $ibx = PublicInbox::Inbox->new({
 	inboxdir => "$tmpdir/testbox",
 	name => $this,