CSRF never fails

Is it just me, or is anyone else experiencing an issue with the CSRF Filter never failing?

Security.php's function verify(RequestInterface $request) has the following line, that for the life of me, I can't get to fail anymore!?

Code:

if (! isset($token, $this->hash) || ! hash_equals($this->hash, $token)) {

How do you know the line is the cause?

ci-phpunit-test | CodeIgniter Testing Guide | CodeIgniter 3 to 4 Upgrade Helper

Finger trouble, sorry, wrong line! I'll correct it to make the question more sensible, thanks Kenjis.

That being said, I wasn't implying the line was the cause... it is only the final "deciding" test... so the problem was somewhere in the setting/recovery of the variables in the comparison.

At any rate, although I didn't get to the bottom of it, I changed the code elsewhere to sidestep the problem... so the problem was likely just me.