Making File System (ext2) fail

[MokkaGnom]

I got the same problem/output like #1011.
The only difference is that i am using ext2 instead of ext4.
I followed a tutorial which uses the partition install method. I created two partitions on my sd-card (1: fat32, 2: ext2).
I tried both solutions from the comment but none of them worked.

Edit: I tried creating it as a file instead of on a partition, that worked. But why didn't it work on a partition?