There were a couple of problems for "make check" in 2.1.15 on macOS, but 2.1.16
has a new set of "make check" failures that did not affect 2.1.15. Main errors
seem to be
"gpg: can't connect to the agent: IPC connect call failed" and
"failed: gpg-connect-agent: no running gpg-agent"
Full build log
https://gist.github.com/ilovezfs/c5eaad1242b983b904429d8307e10ea1
"make check" begins at line 899:
https://gist.github.com/ilovezfs/c5eaad1242b983b904429d8307e10ea1#file-gistfile1-txt-L899