R Under development (unstable) (2023-07-16 r84696 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(s3)
> 
> test_check("s3")
[ FAIL 0 | WARN 0 | SKIP 26 | PASS 4 ]

══ Skipped tests (26) ══════════════════════════════════════════════════════════
• On CRAN (23): 'test-s3_check_for_file.R:2:3',
  'test-s3_check_for_file.R:12:3', 'test-s3_check_for_file.R:22:3',
  'test-s3_check_for_file.R:29:3', 'test-s3_check_for_file.R:37:3',
  'test-s3_check_for_file.R:49:3', 'test-s3_check_for_file.R:61:3',
  'test-s3_get.R:2:3', 'test-s3_get.R:39:3', 'test-s3_get.R:51:3',
  'test-s3_get.R:66:3', 'test-s3_get.R:81:3', 'test-s3_get.R:96:3',
  'test-s3_get_file_size.R:2:3', 'test-s3_get_file_size.R:15:3',
  'test-s3_get_file_size.R:24:3', 'test-s3_get_files.R:2:3',
  'test-s3_get_files.R:17:3', 'test-s3_get_files.R:33:3',
  'test-s3_get_files.R:54:3', 'test-s3_get_files.R:75:3',
  'test-s3_get_files.R:94:3', 'test-s3_get_signed_url.R:2:3'
• aws credentials not available for testing (3): 'test-aws_env_vars.R:2:3',
  'test-s3_get.R:17:3', 'test-s3_get.R:28:3'

[ FAIL 0 | WARN 0 | SKIP 26 | PASS 4 ]
> 
> proc.time()
   user  system elapsed 
   1.00    0.07    1.07