Unit test question

I am trying to do some tests and I am getting

Declaration of Post::beforeValidation() should be compatible with the CModel::beforeValidate().

Hey ? Someone ?

check you Post::beforeValidate() method and see if it is compatible with CModel::beforeValidate().

Ok I will. I am using the Blog example app to do it.

I did no modifications in these files.

I am using the example written in documentation.

Thanks :)