The first test is run in skipped package

Hi,
In my use case I need to skip all tests in some python package. For this purpose I added pytestmark to __init__.py:

# __init__.py
import pytest
pytestmark = pytest.mark.skip

I expect all tests to be skipped in this package. However, the first test in this package runs.

Here is a failed test for this issue:

def test_skip_package(testdir):
    testdir.makepyfile(
        __init__="""
        import pytest
        pytestmark = pytest.mark.skip
    """
    )

    testdir.makepyfile(
        """
        import pytest
        def test_skip1():
            assert 0
        def test_skip2():
            assert 0
    """
    )

    result = testdir.inline_run()
    _, skipped, _ = result.listoutcomes()
    assert len(skipped) == 2

Start by running the issue's test_skip_package reproduction with testdir and inspect the package-level pytestmark behavior during collection. Confirm the current result and trace why the first test is not skipped. Done means both test_skip1 and test_skip2 are reported as skipped, with the regression test passing.