R Under development (unstable) (2023-08-20 r84995 ucrt) -- "Unsuffered Consequences"
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> Sys.setenv("R_TESTS" = "")
> library(testthat)
> library(qicharts2)
> 
> test_check("qicharts2")
[ FAIL 0 | WARN 2 | SKIP 10 | PASS 5 ]

══ Skipped tests (10) ══════════════════════════════════════════════════════════
• On CRAN (10): 'test_montgomery.R:6:3', 'test_montgomery.R:27:3',
  'test_montgomery.R:48:3', 'test_montgomery.R:71:3', 'test_montgomery.R:86:3',
  'test_montgomery.R:99:3', 'test_montgomery.R:114:3',
  'test_montgomery.R:127:3', 'test_montgomery.R:141:3',
  'test_montgomery.R:154:3'

[ FAIL 0 | WARN 2 | SKIP 10 | PASS 5 ]
> 
> proc.time()
   user  system elapsed 
   3.64    0.31    4.03