vscode-pytest-update-snapshot

Run pytest on the test under your cursor and update inline snapshots (VSCode-friendly).

Install / Run (no install with uvx)

uvx vscode-pytest-update-snapshot tests/test_example.py 12
# ensure it uses your project venv interpreter:
uvx --python ".venv/Scripts/python.exe" vscode-pytest-update-snapshot tests/test_example.py 12

Pass extra pytest args after --:

uvx vscode-pytest-update-snapshot tests/test_example.py 12 -- -q -k "mycase"

Requirements

• Python 3.10+ (tested on 3.12)
• uv installed on your PATH (pipx install uv or pip install uvtools—use your preferred method)
• A project virtual environment selected in VSCode (bottom-right status bar → Select Interpreter)
• These packages installed in your project venv:
  • pytest
  • inline-snapshot (with Ruff formatting, see config below)
  • ruff

Install with uv:

uv add pytest ruff inline-snapshot --dev

Inline-snapshot formatting via Ruff

Add this to your pyproject.toml:

[tool.inline-snapshot]
# Format with Ruff; read/write via stdin/stdout so inline-snapshot can capture it
format-command = "ruff format --stdin-filename {filename}"

[tool.ruff]
line-length = 100
target-version = "py312"

[tool.ruff.format]
quote-style = "double"
indent-style = "space"
docstring-code-format = true

[tool.pytest.ini_options]
addopts = "-q"
testpaths = ["tests"]

VSCode setup

This repo includes templates for a handy “Update snapshot (test at cursor)” action.

Keybinding

1. Open Command Palette → Preferences: Open Keyboard Shortcuts (JSON).
2. Copy the contents of template_keybindings.json into the file and save.

VSCode’s keybindings file supports comments (JSONC). You can keep the comments.

Task

1. For a workspace task: open .vscode/tasks.json (create if missing) and copy from template_tasks.json.
2. For a profile-level (user) task: Command Palette → Tasks: Open User Tasks, then paste the task there.

Either way, VSCode tasks also support comments (JSONC).

Run it

• Put the cursor on a test line in a Python file.
• Press the configured shortcut (default Ctrl+Alt+U) or run Terminal → Run Task → Update snapshot (test at cursor).
• Make sure your interpreter/venv is selected in the VSCode status bar so pytest and inline-snapshot are found.

Install this CLI (editable during development)

uv pip install -e .

(or publish and use uvx, but for local dev the editable install is simplest.)