# How to Execute the Test Suite in TheAlgorithms/Python: A Complete Guide > Execute the TheAlgorithms/Python test suite easily. Install dependencies with pip and run pytest from the repo root to validate algorithm correctness. - Repository: [The Algorithms/Python](https://github.com/TheAlgorithms/Python) - Tags: tutorial - Published: 2026-02-24 --- **Run `pytest` from the repository root after installing test dependencies with `pip install -e .[test]` to execute the comprehensive pytest-based test suite that validates every algorithm in TheAlgorithms/Python.** TheAlgorithms/Python maintains rigorous quality standards by validating every implementation with a comprehensive pytest-based test suite. To ensure algorithm correctness before contributing or deploying code, you need to execute the test suite using the configuration defined in [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml). This guide covers the complete workflow from environment setup to targeted test execution. ## Installing Test Dependencies Before you can execute the test suite, configure your environment with the necessary testing tools. The repository defines test dependencies in the `[dependency-groups] test` section of [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml), which includes **pytest** and **pytest-cov** among other tools. Clone the repository and install the package in editable mode with test extras: ```bash git clone https://github.com/TheAlgorithms/Python.git cd Python python3 -m pip install -e .[test] ``` This command pulls the dependencies specified in lines 35-40 of [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml), ensuring your environment matches the project's testing requirements. ## Running the Full Test Suite Once dependencies are installed, execute the test suite by invoking pytest from the repository root. The command automatically discovers every `test_*.py` file within `tests/` directories across the codebase, such as [`matrix/tests/test_matrix_operation.py`](https://github.com/TheAlgorithms/Python/blob/main/matrix/tests/test_matrix_operation.py) and files in `knapsack/tests/` or `graphs/tests/`. ```bash pytest ``` ### Running Tests with Coverage Reports For contributions or quality assurance, generate coverage reports to identify untested code paths. Use the following flags to produce a terminal report showing missing coverage: ```bash pytest -v --cov=. --cov-report=term-missing ``` The `-v` flag enables verbose output showing each test name, while `--cov` and `--cov-report` leverage the `pytest-cov` dependency defined in the project's test group. ### Understanding Doctest Integration TheAlgorithms/Python embeds usage examples directly in algorithm docstrings as doctests. The project automatically executes these through the configuration in `[tool.pytest.ini_options]` within [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml), which includes the `--doctest-modules` flag. When you execute the test suite, pytest validates that code examples in documentation produce the expected results alongside traditional unit tests. ## Executing Specific Test Subsets When debugging or developing specific algorithms, you can execute targeted portions of the test suite rather than running the entire collection. ### Running Tests by Directory Focus on a specific algorithm family by providing the directory path to pytest. For example, to validate only matrix operations: ```bash pytest matrix/tests ``` Or run a single test file directly: ```bash pytest knapsack/tests/test_greedy_knapsack.py ``` ### Using Custom Markers The repository supports custom pytest markers for organizing tests by functionality. In [`matrix/tests/pytest.ini`](https://github.com/TheAlgorithms/Python/blob/main/matrix/tests/pytest.ini), the project defines a `mat_ops` marker for matrix operation tests. Execute only marked tests using: ```bash pytest -m mat_ops ``` This approach is useful when working with specific algorithm categories defined in local pytest configuration files. ## Summary - Install test dependencies using `pip install -e .[test]` to access pytest and coverage tools defined in [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml) - Execute the full test suite by running `pytest` from the repository root, which discovers tests in all `tests/` subdirectories - Generate coverage reports with `pytest --cov=. --cov-report=term-missing` to ensure comprehensive algorithm validation - Target specific test groups using directory paths or custom markers like `mat_ops` defined in [`matrix/tests/pytest.ini`](https://github.com/TheAlgorithms/Python/blob/main/matrix/tests/pytest.ini) - Doctests embedded in algorithm docstrings execute automatically through the `--doctest-modules` configuration in [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml) ## Frequently Asked Questions ### How do I install the test dependencies for TheAlgorithms/Python? Install the package in editable mode with the test extra group: `python3 -m pip install -e .[test]`. This command installs pytest, pytest-cov, and other testing tools listed in the `[dependency-groups] test` section of [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml). ### Does the test suite include doctests embedded in algorithm docstrings? Yes. The project configuration in `[tool.pytest.ini_options]` within [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml) includes the `--doctest-modules` flag, which automatically validates code examples in docstrings when you execute pytest. ### How can I run only the tests for a specific algorithm category? Provide the specific directory path to pytest, such as `pytest matrix/tests` for matrix operations, or use custom markers like `pytest -m mat_ops` to filter tests by functionality as defined in local [`pytest.ini`](https://github.com/TheAlgorithms/Python/blob/main/pytest.ini) files. ### Where is the pytest configuration defined in this repository? The global pytest configuration resides in [`pyproject.toml`](https://github.com/TheAlgorithms/Python/blob/main/pyproject.toml) under the `[tool.pytest.ini_options]` section, which specifies default options including `--doctest-modules`. Individual test directories like `matrix/tests/` may contain local [`pytest.ini`](https://github.com/TheAlgorithms/Python/blob/main/pytest.ini) files defining additional markers.