Add test instructions

lumigator/python/mzai/backend/README.md

@@ -18,6 +18,14 @@ uv sync --dev && \
 source .venv/bin/activate
 ```
 
+## Test instructions
+
+The backend needs to retrieve the location of the database used in tests via the `SQLALCHEMY_DATABASE_URL` enviroment variable. For simplicity, an SQLite inside the test container is used. To run the tests, please use:
+
+```bash
+SQLALCHEMY_DATABASE_URL=sqlite:///local.db uv run pytest
+```
+
 ## Data models
 
 As an engineer/contributor, when you change a data model or add a new model which needs to be

lumigator/python/mzai/sdk/README.md

@@ -15,8 +15,26 @@ or
 uv pip install lumigator-sdk
 ```
 
-
 Now that you have the SDK installed, you can use it to communicate with Lumigator. You can run the
 [example notebook](/notebooks/walkthrough.ipynb) for a platform API walkthrough, or follow the
 [quickstart guide](https://mozilla-ai.github.io/lumigator/get-started/quickstart.html) in the
 documentation.
+
+## Test instructions
+
+The SDK contains both unit tests (requiring no additional containers) and integration tests (requiring a live lumigator backend). By default only unit tests are run.
+
+To run unit tests, please use:
+
+```bash
+uv run pytest
+```
+
+To run integration tests, please use:
+
+```bash
+pushd ../../../../ # go back to the project root
+make start-lumigator-build # wait until all containers are up and running
+popd
+uv run pytest -o python_files="int_test_*.py"
+```