使用Python 2.6，我在目录中的python文件中进行了非常简单的测试：

#mytest.py
import unittest

class BasicTests(unittest.TestCase):
    def test_ok(self):
        self.assertTrue(True)

suite = unittest.TestLoader().loadTestsFromTestCase(BasicTests)

我进入目录并运行，python -m unittest mytest.suite并出现以下错误：

Traceback (most recent call last):
  File "/usr/lib/python2.6/runpy.py", line 122, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/usr/lib/python2.6/runpy.py", line 34, in _run_code
    exec code in run_globals
  File "/usr/lib/python2.6/unittest.py", line 875, in <module>
    main(module=None)
  File "/usr/lib/python2.6/unittest.py", line 816, in __init__
    self.parseArgs(argv)
  File "/usr/lib/python2.6/unittest.py", line 843, in parseArgs
    self.createTests()
  File "/usr/lib/python2.6/unittest.py", line 849, in createTests
    self.module)
  File "/usr/lib/python2.6/unittest.py", line 613, in loadTestsFromNames
    suites = [self.loadTestsFromName(name, module) for name in names]
  File "/usr/lib/python2.6/unittest.py", line 598, in loadTestsFromName
    test = obj()
  File "/usr/lib/python2.6/unittest.py", line 464, in __call__
    return self.run(*args, **kwds)
TypeError: run() takes exactly 2 arguments (1 given)

我尝试了几种变体（例如unittest.makeSuite和unittest.LoadTestFromNames），但它们都给了我相同的基本错误。我想念什么？我一直在阅读文档，并且似乎遵循规范。