RC4 doesn't work correctly with openssl command?

I need to encode the result of a execution with RC4. Before to do the bash script, I'm testing how to crypt the data.

I'm using the next command:

echo -ne "test" | openssl rc4 -k test -nosalt -e -nopad | xxd

And the output is:

0000000: bdb1 7f03                                ....

now, If I try to do the same with this online RC4 encoder http://www.fyneworks.com/encryption/rc4-encryption/index.asp the output is: DA EA 54 65

Different output, with the same data and same key?? Data: "test" key: "test"

Also I checked with a small program that I have coded in C, and the output is the same that the online encoder... so, the question is, what I'm doing wrong with the command openssl??

Thanks!