SCAN is not working

[midlan]

Let's have this set of commands:

set a 1
set b 2
set c 3
scan 0 count 1

On my local machine with redis-cli I'm getting reult simular to:

1) "2"
2) 1) "b"

With try.redis.io I'm getting:

1) "524288"
2) (empty list or set)

I am not redis expert, but seems wrong to me.