t/httpd-corner.psgi |  3 +++
 t/httpd-corner.t    | 21 +++++++++++++++++----
 t/httpd.t           |  2 +-
 t/v2mirror.t        |  3 ++-
 t/v2writable.t      |  2 +-
 t/www_listing.t     |  2 +-

diff --git a/t/httpd-corner.psgi b/t/httpd-corner.psgi
index 5628f4abd5c92002abc48bd971a35f88454ab59a..bf38d1ff7995ddf1c8ee2447ccf1c956147f9419 100644
--- a/t/httpd-corner.psgi
+++ b/t/httpd-corner.psgi
@@ -85,6 +85,9 @@ 			return until length($$bref) > 8000;
 			close $null;
 			[ 200, [ qw(Content-Type application/octet-stream) ]];
 		});
+	} elsif ($path eq '/pid') {
+		$code = 200;
+		push @$body, $$;
 	}
 
 	[ $code, $h, $body ]
diff --git a/t/httpd-corner.t b/t/httpd-corner.t
index 13c0c2db19e9cd40b8b542c111229e0f028e1c50..75573c3ef23a423a1238320b2b70cea592834a19 100644
--- a/t/httpd-corner.t
+++ b/t/httpd-corner.t
@@ -28,7 +28,7 @@ my $err = "$tmpdir/stderr.log";
 my $out = "$tmpdir/stdout.log";
 my $httpd = 'blib/script/public-inbox-httpd';
 my $psgi = "./t/httpd-corner.psgi";
-my $sock = tcp_server();
+my $sock = tcp_server() or die;
 
 # make sure stdin is not a pipe for lsof test to check for leaking pipes
 open(STDIN, '<', '/dev/null') or die 'no /dev/null: $!';
@@ -63,9 +63,22 @@ 	$pid = spawn_listener(undef, $cmd, [ $sock, $unix ]);
 	ok(defined $pid, 'forked httpd process successfully');
 };
 
-{
-	ok($sock, 'sock created');
-	$spawn_httpd->('-W0');
+$spawn_httpd->();
+if ('test worker death') {
+	my $conn = conn_for($sock, 'killed worker');
+	$conn->write("GET /pid HTTP/1.0\r\n\r\n");
+	ok($conn->read(my $buf, 8192), 'read response');
+	my ($head, $body) = split(/\r\n\r\n/, $buf);
+	like($body, qr/\A[0-9]+\z/, '/pid response');
+	my $pid = $body;
+	is(kill('KILL', $pid), 1, 'killed worker');
+
+	$conn = conn_for($sock, 'respawned worker');
+	$conn->write("GET /pid HTTP/1.0\r\n\r\n");
+	ok($conn->read($buf, 8192), 'read response');
+	($head, $body) = split(/\r\n\r\n/, $buf);
+	like($body, qr/\A[0-9]+\z/, '/pid response');
+	isnt($body, $pid, 'respawned worker');
 }
 
 {
diff --git a/t/httpd.t b/t/httpd.t
index 1340a7b3c02bb2003b0737cae4b0fe7809187155..15984a78e6d37901e0112d01de4dd8b10e27ce70 100644
--- a/t/httpd.t
+++ b/t/httpd.t
@@ -53,7 +53,7 @@ 		$im->add($mime);
 		$im->done($mime);
 	}
 	ok($sock, 'sock created');
-	my $cmd = [ $httpd, "--stdout=$out", "--stderr=$err" ];
+	my $cmd = [ $httpd, '-W0', "--stdout=$out", "--stderr=$err" ];
 	$pid = spawn_listener(undef, $cmd, [$sock]);
 	my $host = $sock->sockhost;
 	my $port = $sock->sockport;
diff --git a/t/v2mirror.t b/t/v2mirror.t
index a097a7f3a2cd0da80f109ec098210c034d0eef43..f826775cd5d52b013748850c4bdcedf2f7165c13 100644
--- a/t/v2mirror.t
+++ b/t/v2mirror.t
@@ -66,7 +66,8 @@
 $! = 0;
 $sock = tcp_server();
 ok($sock, 'sock created');
-my $cmd = [ "$script-httpd", "--stdout=$tmpdir/out", "--stderr=$tmpdir/err" ];
+my $httpd = "$script-httpd";
+my $cmd = [ $httpd, '-W0', "--stdout=$tmpdir/out", "--stderr=$tmpdir/err" ];
 ok(defined($pid = spawn_listener(undef, $cmd, [ $sock ])),
 	'spawned httpd process successfully');
 my ($host, $port) = ($sock->sockhost, $sock->sockport);
diff --git a/t/v2writable.t b/t/v2writable.t
index bfe17d0a843a7b33ec4b17c1c3079c042cc312b2..28420bb92419a4259707cae1cf4a67d8bf292aa9 100644
--- a/t/v2writable.t
+++ b/t/v2writable.t
@@ -167,7 +167,7 @@ 	my $pid;
 	my $len;
 	END { kill 'TERM', $pid if defined $pid };
 	my $nntpd = 'blib/script/public-inbox-nntpd';
-	my $cmd = [ $nntpd, "--stdout=$out", "--stderr=$err" ];
+	my $cmd = [ $nntpd, '-W0', "--stdout=$out", "--stderr=$err" ];
 	$pid = spawn_listener({ PI_CONFIG => $pi_config }, $cmd, [ $sock ]);
 	my $host_port = $sock->sockhost . ':' . $sock->sockport;
 	my $n = Net::NNTP->new($host_port);
diff --git a/t/www_listing.t b/t/www_listing.t
index 3d1b64ad4beea427592dfe29c5df5eb5ec622122..61a059e56cf7aa2b88046d8d81c5f757954d5ea9 100644
--- a/t/www_listing.t
+++ b/t/www_listing.t
@@ -106,7 +106,7 @@ 	address = v2\@example.com
 
 	close $fh or die;
 	my $env = { PI_CONFIG => $cfgfile };
-	my $cmd = [ $httpd, "--stdout=$out", "--stderr=$err" ];
+	my $cmd = [ $httpd, '-W0', "--stdout=$out", "--stderr=$err" ];
 	$pid = spawn_listener($env, $cmd, [$sock]);
 	$sock = undef;