The 'sage -testall' and 'sage -tnew' operators invoke the scripts
SAGE_LOCAL/bin/sage-maketest
SAGE_LOCAL/bin/sage-test-new
respectively. To run the tests, both scripts use 'sage -t', which calls
the serial doctest runner
SAGE_LOCAL/bin/sage-test
Moreover, sage-test-new does not pass along command-line arguments. But
it would be useful to generalize.
I've opened