[skip changelog] Consolidate integration test instructions

docs/CONTRIBUTING.md

@@ -129,7 +129,9 @@ pip3 install --user poetry
 
 For more installation options read the [official documentation][poetry-docs].
 
-After Poetry has been installed you should be able to run the tests with:
+#### Running tests
+
+After the software requirements have been installed you should be able to run the tests with:
 
 ```shell
 task test-integration
@@ -138,6 +140,28 @@ task test-integration
 This will automatically install the necessary dependencies, if not already installed, and run the integration tests
 automatically.
 
+To run specific modules you must run `pytest` from the virtual environment created by Poetry.
+
+```shell
+poetry run pytest test/test_lib.py
+```
+
+To run very specific test functions:
+
+```shell
+poetry run pytest test/test_lib.py::test_list
+```
+
+You can avoid writing the `poetry run` prefix each time by creating a new shell inside the virtual environment:
+
+```shell
+poetry shell
+pytest test_lib.py
+pytest test_lib.py::test_list
+```
+
+#### Linting and formatting
+
 When editing any Python file in the project remember to run linting checks with:
 
 ```shell

test/README.md

@@ -3,66 +3,4 @@
 This dir contains integration tests, aimed to test the Command Line Interface and its output from a pure user point of
 view.
 
-## Installation
-
-See also [Contributing][0].
-
-To run the integration tests you must install [Poetry][poetry-website].
-
-```shell
-pip3 install --user poetry
-```
-
-For more installation options read the [official documentation][poetry-docs].
-
-## Running tests
-
-To run all the tests from the project's root folder:
-
-```shell
-task test-integration
-```
-
-This will create and install all necessary dependencies if not already existing and then run integrations tests.
-
-To run specific modules you must run `pytest` from the virtual environment created by Poetry. If dependencies have not
-already been installed first run `poetry install`.
-
-```shell
-poetry run pytest test/test_lib.py
-```
-
-To run very specific test functions:
-
-```shell
-poetry run pytest test/test_lib.py::test_list
-```
-
-You can avoid writing the `poetry run` prefix each time by creating a new shell inside the virtual environment:
-
-```shell
-poetry shell
-pytest test_lib.py
-pytest test_lib.py::test_list
-```
-
-## Linting and formatting
-
-To run lint check from the project's root folder:
-
-```shell
-task python:check
-```
-
-This will run `flake8` automatically and return any error in the code formatting, if not already installed it will also
-install integration tests dependencies.
-
-In case of linting errors you should be able to solve most of them by automatically formatting with:
-
-```shell
-task python:format
-```
-
-[0]: ../docs/CONTRIBUTING.md
-[poetry-website]: https://python-poetry.org/
-[poetry-docs]: https://python-poetry.org/docs/
+For instructions, see the [contributing guide](../docs/CONTRIBUTING.md/#integration-tests).