Django 做单元测试时报错了

IDE用eclipse + PyDev, Django的项目，用apache2启动，有一个test.py。

Django 版本1.6 Python版本2.7.6

settings中UNIT_TEST_FLAG已经设置为True

当我用eclipse的Debug As Python unit-test做单元测试时，出现了下面的错误...

 
pydev debugger: starting (pid: 23225)
Finding files... done.
Importing test modules ... 172.17.0.2:6379
{'default': {'ENGINE': 'django.db.backends.mysql', 'NAME': 'mydatabase', 'OPTIONS': {'charset': 'utf8mb4'}, 'HOST': '172.17.0.1', 'USER': 'root', 'PASSWORD': 'hello123', 'PORT': '3306'}, 'OPTIONS': {'autocommit': True, 'timeout': 20}}
done.
Traceback (most recent call last):
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/pydevd.py", line 2278, in <module>
    globals = debugger.run(setup['file'], None, None)
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/pydevd.py", line 1704, in run
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/runfiles.py", line 234, in <module>
    main()
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/runfiles.py", line 78, in main
    return pydev_runfiles.main(configuration)  # Note: still doesn't return a proper value.
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/pydev_runfiles.py", line 835, in main
    PydevTestRunner(configuration).run_tests()
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/pydev_runfiles.py", line 793, in run_tests
    MyDjangoTestSuiteRunner(run_tests).run_tests([])
  File "/home/jeff/software/eclipse/plugins/org.python.pydev_4.0.0.201504132356/pysrc/pydev_runfiles.py", line 813, in run_tests
    raise AssertionError("Unable to run suite with DjangoTestSuiteRunner because it couldn't be imported.")
AssertionError: Unable to run suite with DjangoTestSuiteRunner because it couldn't be imported.

DjangoTestSuiteRunner 好像是一个旧的Test Runner，1.6及1.6之后好像是基于unittest的，我的测试代码也是导入unittest的，我该怎么切换到unittest？

Python的新手，要接受一个准备上线的项目维护