R Under development (unstable) (2024-03-19 r86153 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(tune)
> 
> # The submission to CRAN has been rejected several times because the _total_
> # time to check the package is too long (>10 min). Most of this is attributable
> # to the install time for dependencies. However, CRAN has been very inconsistent
> # about this with one submission stating that the rule is that the check time
> # should be less than 10 min while in another that the total check time,
> # _aggregated over all architectures_, should be under 10 min (e.g. adding the
> # windows check times for 32 and 64 bit to the linux test times and so on).
> # Since they have been undependable on this, we'll avoid running all tests on
> # CRAN.
> 
> if (identical(Sys.getenv("NOT_CRAN"), "true")) { # emulates `testthat:::on_cran()`
+   if (requireNamespace("xml2")) {
+     test_check("tune", reporter = MultiReporter$new(reporters = list(JunitReporter$new(file = "test-results.xml"), CheckReporter$new())))
+   } else {
+     test_check("tune")
+   }
+ }
> 
> proc.time()
   user  system elapsed 
   3.25    0.45    3.70