R Under development (unstable) (2024-11-22 r87365 ucrt) -- "Unsuffered Consequences"
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> if (requireNamespace("testthat", quietly = TRUE)) {
+   library("checkmate")
+   library("testthat")
+   library("mlr3")
+   test_check("mlr3")
+ }
Loading required namespace: Matrix
[ FAIL 0 | WARN 0 | SKIP 5 | PASS 13609 ]

══ Skipped tests (5) ═══════════════════════════════════════════════════════════
• On CRAN (3): 'test_Measure.R:128:3', 'test_Task.R:678:3',
  'test_parallel.R:91:3'
• On Windows (1): 'test_parallel.R:62:3'
• distr6 cannot be loaded (1): 'test_PredictionRegr.R:54:3'

[ FAIL 0 | WARN 0 | SKIP 5 | PASS 13609 ]
Warning message:
In file.remove("tests/testthat/Rplots.pdf") :
  cannot remove file 'tests/testthat/Rplots.pdf', reason 'No such file or directory'
> 
> proc.time()
   user  system elapsed 
  90.09    5.64  158.89