import sys, os
import unittest

try: # use the 'installed' mpi4py
    import mpi4py
except ImportError: # or the no yet installed mpi4py
    from distutils.util import get_platform
    plat_specifier = ".%s-%s" % (get_platform(), sys.version[0:3])
    os.path.split(__file__)[0]
    path = os.path.join(os.path.split(__file__)[0], os.path.pardir,
                        'build', 'lib' + plat_specifier)
    path = os.path.normpath(path)
    sys.path.insert(0, path)
    import mpi4py

from mpi4py import MPI
sys.stderr.flush()
sys.stderr.write("mpi4py imported from '%s'\n" % mpi4py.__path__[0])
sys.stderr.flush()

# make sure we are using the Cython-based version
assert os.path.splitext(MPI.__file__)[1] not in ('.py', '.pyc', '.pyo')

testpath = os.path.split(__file__)[0]
sys.path.insert(0, testpath)
import mpiunittest

alltests = mpiunittest.find_tests(
    exclude=[
             ]
    )

def runtests(*args, **kargs):
    for test in alltests:
        sys.stderr.flush()
        sys.stderr.write("\nrunning %s" % test.__name__)
        sys.stderr.flush()
        mpiunittest.main(test, *args, **kargs)


if __name__ == '__main__':
    runtests()

import sys, os
import unittest

try: # use the 'installed' mpi4py
    import mpi4py
except ImportError: # or the no yet installed mpi4py
    from distutils.util import get_platform
    plat_specifier = ".%s-%s" % (get_platform(), sys.version[0:3])
    os.path.split(__file__)[0]
    path = os.path.join(os.path.split(__file__)[0], os.path.pardir,
                        'build', 'lib' + plat_specifier)
    path = os.path.normpath(path)
    sys.path.insert(0, path)
    import mpi4py

from mpi4py import MPI
sys.stderr.write("mpi4py imported from '%s'\n" % mpi4py.__path__[0])
sys.stderr.flush()

# make sure we are using the Cython-based version
assert os.path.splitext(MPI.__file__)[1] not in ('.py', '.pyc', '.pyo')

testpath = os.path.split(__file__)[0]
sys.path.insert(0, testpath)
import mpiunittest

alltests = mpiunittest.find_tests(
    exclude=[
             ]
    )

def runtests(*args, **kargs):
    for test in alltests:
        mpiunittest.main(test, *args, **kargs)


if __name__ == '__main__':
    runtests()

--- 
+++ 
@@ -14,6 +14,7 @@
     import mpi4py
 
 from mpi4py import MPI
+sys.stderr.flush()
 sys.stderr.write("mpi4py imported from '%s'\n" % mpi4py.__path__[0])
 sys.stderr.flush()
 
@@ -31,6 +32,9 @@
 
 def runtests(*args, **kargs):
     for test in alltests:
+        sys.stderr.flush()
+        sys.stderr.write("\nrunning %s" % test.__name__)
+        sys.stderr.flush()
         mpiunittest.main(test, *args, **kargs)
 
 
Print test names when running full testsuite