Flight Aware showed one of the $TMPS Tristar aircraft N703CS flying out of Fort Lauderdale in March.
1 hr 3 min flight - about right for a test or pilot certification.
Having researched further, I have deduced that it wasn't the only other US FAA registered Tristar "STARGAZER" which is N140SC - so probably not a typo on the log.
Here is a list of its flights March > May 2019:
I have signed up for free basic membership of Flight Aware to get alerts on any future flights of aircraft in the $TMPS Tristar Fleet.