Various tests, particularly the client program tests
    under src/bin, use the Perl TAP tools and are run
    using the Perl testing program prove.  You can pass
    command-line options to prove by setting
    the make variable PROVE_FLAGS, for example:
make -C src/bin check PROVE_FLAGS='--timer'
    See the manual page of prove for more information.
   
    The make variable PROVE_TESTS
    can be used to define a whitespace-separated list of paths relative
    to the Makefile invoking prove
    to run the specified subset of tests instead of the default
    t/*.pl.  For example:
make check PROVE_TESTS='t/001_test1.pl t/003_test3.pl'
    The TAP tests require the Perl module IPC::Run.
    This module is available from CPAN or an operating system package.