R Under development (unstable) (2024-07-30 r86939 ucrt) -- "Unsuffered Consequences"
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> library("testthat")
> library("margins")
> test_check("margins")
     wt       hp
 -2.782 -0.01277
 at(wt)     wt       hp
      3 -2.782 -0.01261
 factor     AME     SE       z      p   lower  upper
     hp -0.0128 0.0576 -0.2216 0.8246 -0.1257 0.1002
     wt -2.7816 2.7208 -1.0223 0.3066 -8.1143 2.5512
Failed with error:  'there is no package called 'betareg''
Failed with error:  'there is no package called 'nnet''
Failed with error:  'there is no package called 'ordinal''
Failed with error:  'there is no package called 'survey''
Failed with error:  'there is no package called 'betareg''
Failed with error:  'there is no package called 'survey''
Failed with error:  'there is no package called 'nnet''
Failed with error:  'there is no package called 'ordinal''
[ FAIL 0 | WARN 1 | SKIP 1 | PASS 126 ]

══ Skipped tests (1) ═══════════════════════════════════════════════════════════
• empty test (1): 'tests-methods.R:179:1'

[ FAIL 0 | WARN 1 | SKIP 1 | PASS 126 ]
> 
> proc.time()
   user  system elapsed 
  22.32    0.73   23.04