rebar3 eunit fails with exception error: not_alive

[rlipscombe]

When running rebar3 eunit, two of the tests fail with the following:

 1) verify_args/1 (peer.erl:860)
    Setup failed:
    exception error: not_alive
      in function  peer:verify_args/1 (peer.erl:860)
      in call from peer:start_it/2 (peer.erl:918)
      in call from meck_tests:remote_setup/0 (test/meck_tests.erl:1376)

 2) verify_args/1 (peer.erl:860)
    Setup failed:
    exception error: not_alive
      in function  peer:verify_args/1 (peer.erl:860)
      in call from peer:start_it/2 (peer.erl:918)
      in call from meck_tests:remote_setup/0 (test/meck_tests.erl:1376)

Oddly, when I use rebar3 eunit --sname a, this fixes one of the tests, but not the other.

I see that the GH workflow doesn't specify --sname, so I'm puzzled as to why it works in GH, but not for me, locally.