self = <test_assertrewrite.TestRewriteOnImport instance at 0x000000000430A208>
monkeypatch = <_pytest.monkeypatch.MonkeyPatch instance at 0x000000000401FF88>

    def test_rewrite_warning_using_pytest_plugins(self, testdir, monkeypatch):
        testdir.makepyfile(**{
            'conftest.py': "pytest_plugins = ['core', 'gui', 'sci']",
            'core.py': "",
            'gui.py': "pytest_plugins = ['core', 'sci']",
            'sci.py': "pytest_plugins = ['core']",
            'test_rewrite_warning_pytest_plugins.py': "def test(): pass",
        })
        testdir.chdir()
        result = testdir.runpytest_subprocess()
>       result.stdout.fnmatch_lines(['*= 1 passed in *=*'])
E       Failed: nomatch: '*= 1 passed in *=*'
E           and: u'============================= test session starts ============================='
E           and: u'platform win32 -- Python 2.7.9, pytest-3.0.5.dev0, py-1.4.31, pluggy-0.4.0'
E           and: u'plugins: hypothesis-3.6.0'
E           and: u'collected 1 items'
E           and: u''
E           and: u'test_rewrite_warning_pytest_plugins.py .'
E           and: u''
E           and: u'=========================== pytest-warning summary ============================'
E           and: u'WP1 None Modules are already imported so can not be re-written: core'
E           and: u'================= 1 passed, 1 pytest-warnings in 0.01 seconds ================='
E       remains unmatched: '*= 1 passed in *=*'