The ScaLAPACK test programs are modeled on those of LAPACK, but are not yet as extensive as those of LAPACK. As well as the additional complexity mentioned above, ScaLAPACK testing can put a serious strain on memory requirements since testing generally requires one or more additional copies of matrices to compute quantities such as the residuals required for the error bounds. Currently the testing routines also serve as the timing routines, but it is hope to change that in the future since the additional memory requirements can severely limit the size of matrix.
Further details on testing and timing for ScaLAPACK can be found in CDOPW:UTK-cs:95.