I have a tool for that, too. It's ~/bin/newtest:

#!/usr/bin/perl -w

use strict;

use File::Path;
use File::Basename;

my $progfile = basename( $0 );
die "$progfile <modname> <test filename>\n" unless @ARGV >= 2;
my ($modname, $filename) = @ARGV;

my $filepath = dirname( $filename );

mkpath( $filepath ) unless -e $filepath;
open my $out, '>', $filename or die "Can't open '$filename': $!";

print $out <<END_HERE;
#!/usr/bin/perl -w

BEGIN
{
    chdir 't' if -d 't';
    use lib '../lib', '../blib/lib';
}

use strict;
use Test::More 'no_plan'; # tests => 1;

my \$module = '$modname';
use_ok( \$module ) or exit;
END_HERE
[download]

For Some::Module, run newtest Some::Module t/testfile.t.