R Under development (unstable) (2023-04-28 r84338 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 3 | PASS 12035 ]

══ Skipped tests ═══════════════════════════════════════════════════════════════
• On CRAN (1)
• On Windows (1)
• distr6 cannot be loaded (1)

[ FAIL 0 | WARN 0 | SKIP 3 | PASS 12035 ]
> 
> proc.time()
   user  system elapsed 
 119.89    5.15  141.20