Sorry, I expected this issue be solved much faster.

Unfortunately Terry's recipe doesn't work. Here is a patch that reapplies changes that broke buildbots (additional tests for buildins and making test_pprint discoverable), and also fixes test_trace and makes it discoverable.

I found yet one issue with test_trace. It fails if run regrtest with the -m option (both patched and unpatched versions, there is no regression).

$ ./python -m test.regrtest test_trace
[1/1] test_trace
1 test OK.
$ ./python -m test.regrtest -m test_coverage test_trace
[1/1] test_trace
test test_trace failed -- Traceback (most recent call last):
  File "/home/serhiy/py/cpython-3.4/Lib/test/test_trace.py", line 313, in test_coverage
    self.assertTrue("pprint.cover" in files)
AssertionError: False is not true

1 test failed:
    test_trace

It fails because run_unittest() is used in tested script. That is yet one argument against using test_pprint in test_trace.