[Python] @pytest.mark.skip vs @pytest.mark.xfail in Pytest

I have @pytest.mark.skip's test1() and @pytest.mark.xfail's test2() which are both True as shown below:

import pytest

@pytest.mark.skip
def test1():
assert True

@pytest.mark.xfail
def test2():
assert True


Then, I ran pytest, then there is the output as shown below:

$ pytest
=================== test session starts ===================
platform win32 -- Python 3.9.13, pytest-7.4.0, pluggy-1.2.0
django: settings: core.settings (from ini)
rootdir: C:\Users\kai\test-django-project2
configfile: pytest.ini
plugins: django-4.5.2
collected 2 items

tests\test_store.py sX [100%]

============== 1 skipped, 1 xpassed in 0.10s ==============


Next, I have @pytest.mark.skip's test1() and @pytest.mark.xfail's test2() which are both False as shown below:

import pytest

@pytest.mark.skip
def test1():
assert False

@pytest.mark.xfail
def test2():
assert False


Then, I ran pytest, then there is the same output as shown below:

$ pytest
=================== test session starts ===================
platform win32 -- Python 3.9.13, pytest-7.4.0, pluggy-1.2.0
django: settings: core.settings (from ini)
rootdir: C:\Users\kai\test-django-project2
configfile: pytest.ini
plugins: django-4.5.2
collected 2 items

tests\test_store.py sx [100%]

============== 1 skipped, 1 xfailed in 0.24s ==============


So, what is the difference between @pytest.mark.skip and @pytest.mark.xfail?

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