In the part 07 of lena151 RE tutorial, we arrive to these instructions:

```
AL = 0
TEST AL,AL
JNZ ...

```

[![enter image description here](https://i.stack.imgur.com/dkz2t.jpg)](https://i.stack.imgur.com/dkz2t.jpg)

And notice:

> 
> Because of the JNZ, AL must be different from zero when arriving here to be registered.
> 
> 
> 

**My question is:** Why the AL must be different from zero? If 2 value (0=0) are equal, the Z flag set to 1, because the result of comparison is true! Is this right?