I have a project with these dependencies:

[project]
name = "play"
version = "0.1.0"
description = "Add your description here"
requires-python = ">=3.13"
dependencies = [
    "coverage>=7.13.1",
    "matplotlib>=3.10.8",
    "numpy>=2.4.0",
    "pandas>=2.3.3",
    "psutil>=7.2.1",
    "pygame>=2.6.1",
    "pyqt5>=5.15.11",
    "regex>=2025.11.3",
    "requests>=2.32.5",
    "scikit-learn>=1.8.0",
    "scipy>=1.16.3",
    "whenever>=0.9.4",
]

It is not uncommon for me to type something and see a flood of test functions from one of the dependencies. (I'll show a demo in a subsequent comment.) Unless we are in a context where we are writing tests, I don't think we ever want to see these.

The main challenge here is just figuring out what it means for:

1. A symbol to be part of tests.
2. To be writing tests.

We could look at how other completion systems work. And also look at what pytest does for test detection.