How-to-prepare-the-code-for-a-release.md

@@ -6,7 +6,8 @@ Here is the checklist to run before releasing a new version for mbtrack2:
 4. Update the pyproject.toml file with version number, new dependencies and so on.
 5. Run poetry:
    * `poetry env use python`
-   * `poetry install`
+   * `poetry install` 
+   * Check that the tests run without errors: `poetry run pytest`
    * `poetry build`
    * Test build on test pypi:
      * `poetry config repositories.test-pypi https://test.pypi.org/legacy/`