diff --git a/t/03_set-x.t b/t/03_set-x.t
new file mode 100755
index 0000000..f63abb6
--- /dev/null
+++ b/t/03_set-x.t
@@ -0,0 +1,28 @@
+#!/usr/bin/env perl
+
+# Basics: is there a synatx error where already bash hiccups on?
+# --banner is equal to --version
+
+use strict;
+use Test::More;
+
+my $tests = 0;
+my $fileout="";
+# Blacklists we use to trigger an error:
+my $error_regexp='^(\|)+([0-9])+>\s+[a-z]';
+
+printf "\n%s\n", "Testing whether we forgot \"set -x\" ...";
+$fileout = `./testssl.sh --help 2>&1`;
+my $retval=$?;
+
+unlike($fileout, qr/$error_regexp/, "just ran help");
+$tests++;
+
+$fileout = `./testssl.sh --ssl-native --color=0 --fast google.com 2>&1`;
+unlike($fileout, qr/$error_regexp/, "ran --ssl-native --color=0 --fast google.com");
+$tests++;
+
+printf "\n";
+done_testing($tests);
+
+