R Under development (unstable) (2025-12-01 r89083 ucrt) -- "Unsuffered Consequences"
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> if (requireNamespace("testthat", quietly = TRUE)) {
+   library("checkmate")
+   library("testthat")
+   library("mlr3")
+   test_check("mlr3")
+ }
<Mlr3TestError: 
x a
> Class: Mlr3TestError
>
<Mlr3ErrorLearnerNoModel: 
x No model stored
> Class: Mlr3ErrorLearnerNoModel
>
[ FAIL 0 | WARN 0 | SKIP 14 | PASS 17030 ]

══ Skipped tests (14) ══════════════════════════════════════════════════════════
• Not on GitHub Actions (1): 'test_backward_compatibility.R:1:1'
• On CRAN (10): 'test_Learner.R:641:3', 'test_Learner.R:847:3',
  'test_Learner.R:870:3', 'test_Learner.R:893:3', 'test_Learner.R:916:3',
  'test_Measure.R:129:3', 'test_Task.R:850:1', 'test_parallel_future.R:91:3',
  'test_parallel_mirai.R:48:3', 'test_parallel_mirai.R:66:3'
• On Windows (1): 'test_parallel_future.R:62:3'
• empty test (1): 'test_Task.R:911:1'
• {distr6} is not installed (1): 'test_PredictionRegr.R:54:3'

[ FAIL 0 | WARN 0 | SKIP 14 | PASS 17030 ]
> 
> proc.time()
   user  system elapsed 
 224.57   14.34  395.32