Readme notes

README.md

@@ -358,7 +358,7 @@ auditwheel repair target/wheels/c2pa_python-0.4.0-py3-none-linux_aarch64.whl
 
 ### Testing
 
-We use [PyTest](https://docs.pytest.org/) for testing.
+We use [PyTest](https://docs.pytest.org/) and [unittest](https://docs.python.org/3/library/unittest.html) for testing.
 
 Run tests by following these steps:
 
@@ -377,6 +377,23 @@ python3 tests/training.py
 deactivate
 ```
 
+#### Testing during bindings development
+
+While developing bindings locally, we recommend you rely on [unittest](https://docs.python.org/3/library/unittest.html), as [PyTest](https://docs.pytest.org/) can get confused by virtual environment redeployments (especially if you bump the version number).
+
+To run tests while developing bindings, you can run:
+
+```sh
+make test
+```
+
+If you want to rebuild and test, run:
+
+```sh
+make build-python
+make test
+```
+
 ## Release notes
 
 ### Version 0.5.2