Determine subcommand

If I run

deno test

deno test

deno test

deno test from the command line, how can I determine that

test

test

is the subcommand being run. The command is not present in

Deno.args

Deno.args

Deno.args

Deno.args, nor

Deno.mainModule

Deno.mainModule

Deno.mainModule

Deno.mainModule

Thanks in advance!