Results of the individual tests described in detail in Sect. 6. The upper left panel shows the results of the intrabin test, describing the probability of not detecting intrabin variability in each of the simulated light curves. The upper right panel shows the results of the rate of change test, describing the fraction of matching simulated samples. The lower left panel shows the results of the flux distribution test, again showing the fraction of the matching simulated samples. The lower right panel describes the results of the fractional variability test, depicting the results in Boolean logic, with 100% signifying a match and 0% a non-match.