R Under development (unstable) (2024-06-19 r86793 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(clubSandwich)
Registered S3 method overwritten by 'clubSandwich':
  method    from    
  bread.mlm sandwich
> 
> test_check("clubSandwich")
[ FAIL 0 | WARN 1 | SKIP 28 | PASS 1415 ]

══ Skipped tests (28) ══════════════════════════════════════════════════════════
• Need to understand target-unbiasedness for ivreg objects. (2):
  'test_AER_ivreg.R:141:3', 'test_ivreg_ivreg.R:141:3'
• On CRAN (24): 'test_Wald.R:119:3', 'test_Wald.R:173:3',
  'test_geeglm.R:161:3', 'test_linear_contrast.R:136:3',
  'test_lme_3level.R:39:3', 'test_lme_3level.R:76:3',
  'test_lme_3level.R:116:3', 'test_lme_3level.R:127:3',
  'test_lme_3level.R:138:3', 'test_lme_3level.R:179:3', 'test_lme_MVML.R:4:1',
  'test_lmerMod.R:124:3', 'test_mlm.R:94:3',
  'test_plm-first-differences.R:92:3', 'test_plm-fixed-effects.R:146:3',
  'test_plm-unbalanced-fixed-effects.R:170:3', 'test_rma-ls.R:26:3',
  'test_rma-mv.R:101:3', 'test_rma-mv.R:220:3', 'test_rma-mv.R:321:3',
  'test_rma-uni.R:76:3', 'test_robu.R:173:3', 'test_robu.R:210:3',
  'test_robu.R:252:3'
• empty test (1): 'test_estfun.R:50:1'
• packageVersion("plm") > "2.6-1" is TRUE (1):
  'test_plm-first-differences.R:41:3'

[ FAIL 0 | WARN 1 | SKIP 28 | PASS 1415 ]
> 
> proc.time()
   user  system elapsed 
  94.12    6.12  100.26