> For the complete documentation index, see [llms.txt](https://tvn.gitbook.io/test-automation-with-python/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://tvn.gitbook.io/test-automation-with-python/pytest/module-3-markers-and-test-selection.md).

# Module 3: Markers and Test Selection

```python
# test_markers.py

import pytest

@pytest.mark.slow
def test_something_slow():
    # test implementation

@pytest.mark.fast
def test_something_fast():
    # test implementation

@pytest.mark.skip(reason="Test not implemented yet")
def test_something_skipped():
    pass
```

```python
# run_tests.py

import pytest

pytest.main(["-m", "slow", "test_markers.py"])

```