R Under development (unstable) (2024-09-25 r87194 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(igraph)

Attaching package: 'igraph'

The following object is masked from 'package:testthat':

    compare

The following objects are masked from 'package:stats':

    decompose, spectrum

The following object is masked from 'package:base':

    union

> 
> test_check("igraph")
Starting 2 test processes
[ FAIL 0 | WARN 27 | SKIP 60 | PASS 3988 ]

══ Skipped tests (60) ══════════════════════════════════════════════════════════
• On CRAN (55): 'test-vs-es.R:136:3', 'test-vs-es.R:157:3',
  'test-vs-es.R:180:3', 'test-adjacency.R:576:3', 'test-adjacency.R:607:3',
  'test-authority.score.R:43:5', 'test-authority.score.R:92:5',
  'test-authority.score.R:100:3', 'test-bug-501-rectangles.R:17:3',
  'test-conversion.R:42:3', 'test-conversion.R:49:3', 'test-games.R:61:3',
  'test-games.R:81:3', 'test-graph.data.frame.R:49:3', 'test-hrg.R:15:3',
  'test-interface.R:123:3', 'test-layout.R:20:3', 'test-layout.R:153:3',
  'test-layout.R:208:3', 'test-make.R:58:3', 'test-make.R:67:3',
  'test-make.R:75:3', 'test-make.R:85:3', 'test-make.R:93:3',
  'test-minimal.st.separators.R:12:3', 'test-modularity_matrix.R:18:3',
  'test-old-data-type.R:94:3', 'test-operators.R:156:3', 'test-par.R:5:3',
  'test-par.R:15:3', 'test-paths.R:22:3', 'test-paths.R:47:3',
  'test-plot.R:17:3', 'test-plot.R:42:3', 'test-plot.R:67:3',
  'test-print.R:51:3', 'test-rng.R:2:3', 'test-serialize.R:9:3',
  'test-trees.R:204:3', 'test-structural.properties.R:18:3',
  'test-structural.properties.R:182:3', 'test-structural.properties.R:202:3',
  'test-utils-assert-args.R:2:3', 'test-utils-assert-args.R:10:3',
  'test-versions.R:9:3', 'test-versions.R:19:3', 'test-versions.R:25:3',
  'test-versions.R:40:3', 'test-versions.R:55:3', 'test-versions.R:72:3',
  'test-versions.R:98:3', 'test-vs-es-printing.R:10:3',
  'test-vs-es-printing.R:28:3', 'test-vs-es-printing.R:43:3',
  'test-vs-es-printing.R:59:3'
• empty test (1): 'test-topology.R:45:1'
• graph cannot be loaded (2): 'test-graphNEL.R:2:3', 'test-graphNEL.R:32:3'
• nested igraph call handling not implemented yet (1):
  'test-structural.properties.R:166:3'
• pcalg cannot be loaded (1): 'test-adjacency.R:20:3'

[ FAIL 0 | WARN 27 | SKIP 60 | PASS 3988 ]
> 
> proc.time()
   user  system elapsed 
  16.28    1.54   71.64