-seek($warn, 0, SEEK_SET) or BAIL_OUT;
-my @warn = <$warn>;
-is(scalar(@warn), 3, 'warned 3 times');
-like($warn[0], qr/ wq_do: /, '1st warned from wq_do');
-like($warn[1], qr/ wq_worker: /, '2nd warned from wq_worker');
-is($warn[2], $warn[1], 'worker did not die');
+SKIP: {
+ skip 'Socket::MsgHdr or Inline::C missing', 11 if !$ppids[0];
+ seek($warn, 0, SEEK_SET) or BAIL_OUT;
+ my @warn = <$warn>;
+ is(scalar(@warn), 3, 'warned 3 times');
+ like($warn[0], qr/ wq_io_do: /, '1st warned from wq_do');
+ like($warn[1], qr/ wq_worker: /, '2nd warned from wq_worker');
+ is($warn[2], $warn[1], 'worker did not die');
+
+ $SIG{__WARN__} = 'DEFAULT';
+ is($ipc->wq_workers_start('wq', 2), $$, 'workers started again');
+ $ipc->wq_broadcast('test_append_pid', "$tmpdir/append_pid");
+ $ipc->wq_close;
+ open my $fh, '<', "$tmpdir/append_pid" or BAIL_OUT "open: $!";
+ chomp(my @pids = <$fh>);
+ my %pids = map { $_ => 1 } grep(/\A[0-9]+\z/, @pids);
+ is(scalar keys %pids, 2, 'broadcast hit both PIDs');
+}