Pulse testing is an effective way of understanding fluid reservoirs. Several noise components bias high-sensitivity pressure measurements so that a considerable part of the tests cannot be interpreted conventionally, thus impeding pulse testing's wide-range application. To improve noise filtering, we developed a computerized method of evaluation and noise suppression, which can enhance interpretability effectively. Only 17% of 617 tests performed in Hungary can be interpreted in the usual way, whereas 78% can be interpreted by the method reviewed in this paper. After an enumeration of the pressure changes (noises) disturbing pulse tests, we illustrate our cycle-sum-up method of noise suppressing and the related interpretation procedure. We also report on results of the reproducibility investigations, and we give a brief outline of the basic principles of interpreting reservoirs with multiple faults.