R Under development (unstable) (2025-09-04 r88794 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> library(mxnorm)
> 
> test_check("mxnorm")
boundary (singular) fit: see help('isSingular')
boundary (singular) fit: see help('isSingular')
boundary (singular) fit: see help('isSingular')
boundary (singular) fit: see help('isSingular')
boundary (singular) fit: see help('isSingular')
boundary (singular) fit: see help('isSingular')
[ FAIL 0 | WARN 2 | SKIP 6 | PASS 87 ]

══ Skipped tests (6) ═══════════════════════════════════════════════════════════
• skimage.filters not available for testing (6): 'test-plot_mx_density.R:21:5',
  'test-plot_mx_discordance.R:21:5', 'test-run_otsu_discordance.R:65:5',
  'test-run_otsu_discordance.R:85:5', 'test-run_otsu_discordance.R:108:5',
  'test-run_otsu_discordance.R:141:5'

[ FAIL 0 | WARN 2 | SKIP 6 | PASS 87 ]
> 
> proc.time()
   user  system elapsed 
  12.21    0.64   21.46