The literature on unit roots and structural breaks has produced numerous tests that follow non-standard asymptotic distributions. By fitting a semi-non-parametric model to these distributions, this paper proposes a new simple way to calculate the p-values.The literature on unit roots and structural breaks has produced numerous tests that follow non-standard asymptotic distributions. By fitting a semi-non-parametric model to these distributions, this paper proposes a new simple way to calculate the p-values.[+][-]