They appear when the tests are run with the `Wextra` flag.
I know of 3 possible solutions:
* A.) `static_cast<void>(unusedParameter);` – the preferred C++ way, but `unity` can also be used with `C`
* B.) `(void) unusedParameter;` – "old" C–style casting – the one I used – compatible with both C and C++
* C.) remove `unusedParameter` var from the function arguments – but keeping the name better explains what it is
```
Library Manager: Installing throwtheswitch/Unity @ ^2.5.2
Unpacking [####################################] 100%
Library Manager: Unity@2.5.2 has been installed!
.pio/build/native/unity_config/unity_config.c:39:37: warning: unused parameter 'baudrate' [-Wunused-parameter]
void unityOutputStart(unsigned long baudrate) { }
^
1 warning generated.
Testing...
```
Dawid Nowak