R Under development (unstable) (2023-08-10 r84931 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(thematic)
> 
> test_check("thematic")
`stat_bin()` using `bins = 30`. Pick better value with `binwidth`.
[ FAIL 0 | WARN 1 | SKIP 16 | PASS 27 ]

══ Skipped tests (16) ══════════════════════════════════════════════════════════
• On CRAN (13): 'test-base.R:9:3', 'test-ggplot.R:31:3', 'test-ggplot.R:149:3',
  'test-ggplot.R:225:3', 'test-ggthemes.R:12:3', 'test-ggthemes.R:27:3',
  'test-ggthemes.R:56:3', 'test-lattice.R:15:3',
  'test-sequential-gradient.R:14:3', 'test-shinytest.R:3:1',
  'test-state.R:5:3', 'test-state.R:27:3', 'test-state.R:43:3'
• gridExtra cannot be loaded (1): 'test-ggplot.R:202:3'
• patchwork cannot be loaded (1): 'test-ggplot.R:213:3'
• sf cannot be loaded (1): 'test-ggplot.R:176:3'

[ FAIL 0 | WARN 1 | SKIP 16 | PASS 27 ]
> 
> proc.time()
   user  system elapsed 
   6.23    0.51    7.23