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+# How to Contribute
+
+First of all: Contributions are very welcome!
+
+Does your change require a test?
+
+## Yes, My Change Requires a Test
+
+So you're going to add or modify functionality? Hey, you rock!
+
+You can use our prepared [Codeception/symfony-module-test](https://github.com/Codeception/symfony-module-tests). It is a minimal (but complete) Symfony project, ready to run tests.
+
+1. On https://github.com/Codeception/symfony-module-tests, click on the "Fork" button. Then, in your terminal, do:
+   ```bash
+   git clone https://github.com/YourUserName/symfony-module-tests.git
+   cd symfony-module-tests
+   git remote add upstream https://github.com/Codeception/symfony-module-tests.git
+   git pull upstream master
+   git rebase upstream/master
+   git checkout -b new_feature
+   ```
+
+2. Continue with step 2+3 at https://github.com/Codeception/symfony-module-tests/blob/main/README.md (i.e. composer + Doctrine fixtures)
+
+3. Edit the module's source code in `vendor/codeception/module-symfony/src/Codeception/Module/Symfony.php` of this project. If you want, you can already write the tests (see step 8).
+
+4. On https://github.com/Codeception/module-symfony, click on the "Fork" button. Then, in your terminal, go to another directory, then:
+   ```bash
+   git clone https://github.com/YourUserName/module-symfony.git
+   cd module-symfony
+   git remote add upstream https://github.com/Codeception/module-symfony.git
+   git pull upstream master
+   git rebase upstream/master
+   git checkout -b new_feature
+   ```
+
+5. Copy your changed code parts from the test project's `Symfony.php` to this fork's `src/Codeception/Module/Symfony.php`
+
+6. Commit:
+   ```bash
+   git add --all
+   git commit --message="Briefly explain what your change is about"
+   git push --set-upstream origin new_feature
+   ```
+
+7. In the CLI output, click on the link to https://github.com/YourUserName/module-symfony/pull/new/new_feature to create a Pull Request through GitHub.com.
+
+Now wait for feedback on your Pull Request.  
+If all is fine, then ...
+
+### ... Write the Test
+
+8. In the test project (`symfony-module-tests`), create a test with the same name as your new function in `tests/Functional/SymfonyModuleCest.php`, following alphabetical order.  
+   Hint: Run this to rebuild Codeception's "Actor" classes (see [Console Commands](https://codeception.com/docs/reference/Commands#Build)) to get auto-completion in your IDE:
+   ```bash
+   vendor/bin/codecept clean
+   vendor/bin/codecept build
+   ```
+
+9. Run the tests with `vendor/bin/codecept run Functional`
+
+10. Commit:
+    ```bash
+    git add --all
+    git commit --message="Add a link to the module's Pull Request you created above"
+    git push --set-upstream origin new_feature
+    ```
+
+11. In the CLI output, click on the link to https://github.com/YourUserName/symfony-module-test/pull/new/new_feature to create a Pull Request through GitHub.com.
+
+
+## No, My Change Does Not Require a Test
+
+So you're going to improve documentation, or just do a really minor code change? Hey, you rock too!
+
+* Either just edit https://github.com/Codeception/module-symfony/blob/master/src/Codeception/Module/Symfony.php on GitHub's website.
+* Or follow steps 4 through 7 from above to do it on your local machine.