R version 4.4.0 alpha (2024-04-04 r86334 ucrt)
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> library(testthat)
> library(labelled)
> test_check("labelled")
# A tibble: 2 × 1
    pos
  <int>
1     3
2     4
 pos variable     label col_type missing values    
 1   Sepal.Length —     dbl      0                 
 2   Sepal.Width  —     dbl      0                 
 3   Petal.Length —     dbl      0                 
 4   Petal.Width  —     dbl      0                 
 5   Species      —     fct      0       setosa    
                                         versicolor
                                         virginica 
[ FAIL 0 | WARN 0 | SKIP 1 | PASS 405 ]

══ Skipped tests (1) ═══════════════════════════════════════════════════════════
• memisc cannot be loaded (1): 'test-to_labelled.r:156:3'

[ FAIL 0 | WARN 0 | SKIP 1 | PASS 405 ]
> 
> proc.time()
   user  system elapsed 
   2.37    0.40    2.71