How to use @everywhere macro in a simple Julia code for parallel computing

I am trying to write a simple Julia code for parallel computing.

I wrote a simple code based on this doc: https://docs.julialang.org/en/latest/manual/parallel-computing

@everywhere function test(x)
    return x * 2.0
end

nprocess = 5
addprocs(nprocess)
responses = Vector{Any}(nworkers())

for i in 1:nworkers()
    responses[i] = remotecall(test, i+1, i)
end

for res in responses
    wait(res)
end

However, I got this error message.

ERROR: LoadError: On worker 2:

UndefVarError: #test not defined

I think the @everywhere macro doesn't work correctly.

I'm using Julia 0.6.0.

Does anyone know how to fix it?