R Under development (unstable) (2023-09-26 r85226 ucrt) -- "Unsuffered Consequences"
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> 
> if (requireNamespace("testthat")) {
+   library(testthat)
+   library(learnr)
+ 
+   test_check("learnr")
+ }
Loading required namespace: testthat
[ FAIL 0 | WARN 0 | SKIP 19 | PASS 822 ]

══ Skipped tests (19) ══════════════════════════════════════════════════════════
• On CRAN (18): 'test-available-tutorials.R:17:3', 'test-evaluators.R:2:3',
  'test-evaluators.R:92:3', 'test-evaluators.R:137:3',
  'test-evaluators.R:179:3', 'test-evaluators.R:212:3',
  'test-evaluators.R:244:3', 'test-evaluators.R:279:3',
  'test-evaluators.R:363:3', 'test-exercise.R:367:3', 'test-exercise.R:1237:3',
  'test-exercise.R:1377:3', 'test-exercise.R:1426:3', 'test-exercise.R:1444:3',
  'test-exercise.R:1472:3', 'test-exercise.R:1535:3',
  'test-shinytest2-aaa.R:2:1', 'test-shinytest2-hints.R:2:1'
• On Windows (1): 'test-exercise.R:1221:3'

[ FAIL 0 | WARN 0 | SKIP 19 | PASS 822 ]
> 
> proc.time()
   user  system elapsed 
  21.37    3.70   48.68