diff --git a/t/12_diff_opensslversions.t b/t/12_diff_opensslversions.t
index eb4d668..0e40ed3 100755
--- a/t/12_diff_opensslversions.t
+++ b/t/12_diff_opensslversions.t
@@ -21,7 +21,7 @@ my $diff="";
 my $distro_openssl="/usr/bin/openssl";
 my @args="";
 # that can be done better but I am a perl n00b ;-)
-my $os=`perl -e 'print "$^O";'`;
+my $os="$^O";
 
 die "Unable to open $prg" unless -f $prg;
 die "Unable to open $distro_openssl" unless -f $distro_openssl;
diff --git a/t/31_isJSON_valid.t b/t/31_isJSON_valid.t
index 9becf16..08c1d02 100755
--- a/t/31_isJSON_valid.t
+++ b/t/31_isJSON_valid.t
@@ -18,7 +18,7 @@ my $cmd_timeout="--openssl-timeout=10";
 my $socket_regex_bl='(e|E)rror|\.\/testssl\.sh: line |(f|F)atal|(c|C)ommand not found';
 my $openssl_regex_bl='(e|E)rror|(f|F)atal|\.\/testssl\.sh: line |Oops|s_client connect problem|(c|C)ommand not found';
 # that can be done better but I am a perl n00b ;-)
-my $os=`perl -e 'print "$^O";'`;
+my $os="$^O";'
 
 die "Unable to open $prg" unless -f $prg;