Since the dereferencing chain is ambiguous, you have to resolve it yourself:

my $word = $rf->{test1};
$tes->$word();
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Well, I asked something very similar some time ago. A particularly interesting reply deals both with symbolic and real references: AIUI

$tes->${\$rf->{test1}}();
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should work. I haven't tested it though, so caveat. Even if it works, it's certainly clumsy and not very friendly to people seeing it.