fix examples

README.md

@@ -61,6 +61,20 @@ Check the `examples/` directory for ready-to-run scripts. To run an example:
 python3 examples/01_simple_route.py
 ```
 
+## Testing
+
+Run the default correctness suite with:
+
+```bash
+python3 -m pytest
+```
+
+Runtime regression checks for the example scenarios are opt-in and require:
+
+```bash
+INIRE_RUN_PERFORMANCE=1 python3 -m pytest -q inire/tests/test_example_performance.py
+```
+
 ## Documentation
 
 Full documentation for all user-tunable parameters, cost functions, and collision models can be found in **[DOCS.md](DOCS.md)**.