Cannot use /testfor command

i have 1.1.0.9 and /testfor works fine, I think you're using it wrong.

Okey then write me the correct command/testfor please ️ ☺

The /testfor command syntax are as is:

/testfor [player]
Example: /testfor @e[type=Zombie,name=HelloWorld!,tag=1]

And this is a team right?
Example:/testfor @a[x=5,y=7,z=4,r=2]

Try using the following syntax:

/testfor @a[x,y,z,r]

so using example coordinates, would look like this:

/testfor @a[10,65,10,25]

Credit to FH_Miner for pointing this out