R Under development (unstable) (2023-11-01 r85459 ucrt) -- "Unsuffered Consequences"
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> library(lme4)
Loading required package: Matrix
> ## This example takes  long : only for testLevel >= 3 :
> d.ok <- isTRUE(try(data(star, package = 'mlmRev')) == 'star')
> if(!interactive() && (lme4:::testLevel() < 3 || !d.ok))
+     q("no")
> proc.time()
   user  system elapsed 
   1.10    0.14    1.23