我在virtualenv下有一个Django项目设置，项目文件夹下有一个空的tests.py。
当我执行＆＃34; python manage.py test＆＃34;时，我收到以下错误：
Traceback (most recent call last):
File "manage.py", line 12, in <module>
execute_from_command_line(sys.argv)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
utility.execute()
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 377, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/commands/test.py", line 50, in run_from_argv
super(Command, self).run_from_argv(argv)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **options.__dict__)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/commands/test.py", line 71, in execute
super(Command, self).execute(*args, **options)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/base.py", line 338, in execute
output = self.handle(*args, **options)
File "/Users/dj_prj/dj_prj/env/lib/python2.7/site-packages/django/core/management/commands/test.py", line 88, in handle
failures = test_runner.run_tests(test_labels)
File "/Users/dj_prj/dj_prj/oicms/test/oicms_test_runner.py", line 209, in run_tests
suite = self.build_suite(test_labels, extra_tests)
File "/Users/dj_prj/dj_prj/oicms/test/oicms_test_runner.py", line 150, in build_suite
tests = self.test_loader.discover(start_dir=label, **kwargs)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/loader.py", line 206, in discover
tests = list(self._find_tests(start_dir, pattern))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/unittest/loader.py", line 267, in _find_tests
raise ImportError(msg % (mod_name, module_dir, expected_dir))
ImportError: 'tests' module incorrectly imported from '/Users/dj_prj/dj_prj/dj_prj'. Expected '/Users/dj_prj/dj_prj/'. Is this module globally installed?