Cannot change colorbar position

question

#1

I am trying to change the colorbar position:

using Plots
# pyplot()
plot(rand(10, 2), marker_z=rand(10), seriestype=:scatter, cb=:top)

But the colorbar position won’t move no matter how I specifiy :cb:
image

It is always on the right side of the image.

I tried using Plots and PyPlot backends, in terminal and IJulia both, which all didn’t work. All the package are up-to-date. Any ideas how may I achieve this? Thanks in advance.