In the past 50 years, very few test pilots have bought the farm. That only happens when they rush the program.
Very much due to the accuracy of CFD/Wind tunnel and other methods of quantifying whole a/c behaviour up to and beyond any likely flight conditions, test or operationally. The high Mach upper certification limits might possibly produce the most uncertain (& disturbing) behaviour, but still pretty well mapped out beforehand.(think the A380 was about M.92 ?)
Not taking anything away from test pilots, but of course the job must be by nature very different to say the early 50's when much less was known, and CFD was just a dream!