--- a/lib/Nagios/Check/DNS/check_tlsa_record.pm	Mon May 30 22:51:07 2016 +0200
+++ b/lib/Nagios/Check/DNS/check_tlsa_record.pm	Tue May 31 16:35:56 2016 +0200
@@ -1,20 +1,21 @@
+package Nagios::Check::DNS::check_tlsa_record;
+
 use strict;
 use warnings;
 use feature qw(say switch);
+use if $ENV{DEBUG} => 'Smart::Comments';
 
 #use if $^V >= v5.0.20 => (experimental => gw(smartmatch));
 use experimental qw(smartmatch);
 use File::Temp;
 
-package Nagios::Check::DNS::check_tlsa_record;
-
-$Nagios::Check::DNS::check_tlsa_record::VERSION = '0.1';
+our $VERSION = '0.1';
 
 #@TODO use only fh of tempfile instead of filename
 my $tempfile = File::Temp->new(
     TEMPLATE => '._tlsaXXXX',
     DIR      => '/tmp/',
-    SUFFIX   => '.tmp'
+    SUFFIX   => '.tmp',
 );
 
 sub main {
@@ -22,7 +23,7 @@
     my $port     = shift || 443;
     my $protocol = shift || 'tcp';
     my $validate = validate_tsla($domain, $port, $protocol);
-    return "$validate";
+    return $validate;
 }
 
 sub dig_tlsa {
@@ -75,7 +76,7 @@
     my $check_expiry = "openssl x509 -in $cert -noout -startdate -enddate";
     my $expiry       = qx($check_expiry);
 
-    return "$expiry";
+    return $expiry;
 }
 
 sub get_tlsa_match_type {
@@ -91,7 +92,7 @@
         when ('2') { $hashit = 'sha512' }
         default { $hashit = 'sha256' }
     }
-    return "$hashit";
+    return $hashit;
 }
 
 sub get_dig_tlsa_record {
@@ -99,21 +100,21 @@
     my $dig_tlsa = substr($dig_return, 6,);
     $dig_tlsa =~ s/(\S*)\s+(\S*)$/$1$2/;
 
-    return "$dig_tlsa";
+    return $dig_tlsa;
 }
 
 sub get_tlsa_usage {
     my $dig_return = shift;
     my $tlsa_usage = substr($dig_return, 0, 1);
 
-    return "$tlsa_usage";
+    return $tlsa_usage;
 }
 
 sub get_tlsa_selector {
     my $dig_return = shift;
     my $tlsa_selector = substr($dig_return, 2, 1);
 
-    return "$tlsa_selector";
+    return $tlsa_selector;
 }
 
 sub validate_tsla {

--- a/t/check_tlsa_record.t	Mon May 30 22:51:07 2016 +0200
+++ b/t/check_tlsa_record.t	Tue May 31 16:35:56 2016 +0200
@@ -4,9 +4,7 @@
 use warnings;
 use Test::More qw(no_plan);
 
-BEGIN { use_ok('Nagios::Check::DNS::check_tlsa_record') };
-
-require_ok('Nagios::Check::DNS::check_tlsa_record');
+BEGIN { use_ok 'Nagios::Check::DNS::check_tlsa_record' };
 
 #@TODO write tests
 #my $return = Nagios::Check::DNS::check_tlsa_record::main(($domain, $port));