import sys
from scipy_test.testing import *

set_package_path()
# make sure that all yyy symbols are imported before the del statement:
from yyy import fun
del sys.path[0]

class test_fun(ScipyTestCase):
      def check_simple(self, level=1):
          assert fun()=='Hello from yyy.fun'
      #...

if __name__ == "__main__":
    ScipyTest('yyy').run()