R Under development (unstable) (2025-10-25 r88970 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 0 | SKIP 112 | PASS 5764 ]

══ Skipped tests (112) ═════════════════════════════════════════════════════════
• On CRAN (108): 'test-aaa-auto.R:2:1', 'test-adjacency.R:616:3',
  'test-adjacency.R:647:3', 'test-adjacency.R:790:3',
  'test-attributes.R:439:3', 'test-attributes.R:468:3',
  'test-attributes.R:479:3', 'test-centrality.R:81:5',
  'test-centrality.R:137:5', 'test-centrality.R:145:3',
  'test-centrality.R:821:3', 'test-centrality.R:832:3',
  'test-community.R:380:3', 'test-conversion.R:51:3', 'test-conversion.R:58:3',
  'test-conversion.R:145:3', 'test-conversion.R:200:3',
  'test-conversion.R:567:3', 'test-conversion.R:682:3', 'test-flow.R:101:3',
  'test-flow.R:145:3', 'test-flow.R:182:3', 'test-flow.R:195:3',
  'test-flow.R:215:3', 'test-flow.R:228:3', 'test-flow.R:255:3',
  'test-flow.R:294:3', 'test-foreign.R:30:3', 'test-foreign.R:39:3',
  'test-foreign.R:48:3', 'test-foreign.R:52:3', 'test-foreign.R:58:3',
  'test-foreign.R:62:3', 'test-fit.R:31:3', 'test-hrg.R:15:3',
  'test-hrg.R:21:3', 'test-hrg.R:28:3', 'test-incidence.R:9:3',
  'test-incidence.R:27:3', 'test-incidence.R:121:3', 'test-incidence.R:139:3',
  'test-incidence.R:219:3', 'test-incidence.R:232:3', 'test-games.R:74:3',
  'test-games.R:94:3', 'test-interface.R:183:3', 'test-interface.R:205:3',
  'test-iterators.R:334:3', 'test-iterators.R:355:3', 'test-iterators.R:378:3',
  'test-iterators.R:447:3', 'test-layout.R:20:3', 'test-layout.R:158:3',
  'test-layout.R:215:3', 'test-layout.R:337:3', 'test-make.R:45:3',
  'test-make.R:71:3', 'test-make.R:80:3', 'test-make.R:88:3',
  'test-make.R:98:3', 'test-make.R:106:3', 'test-make.R:270:3',
  'test-minimum.spanning.tree.R:37:3', 'test-other.R:32:3',
  'test-other.R:39:3', 'test-other.R:63:3', 'test-other.R:162:3',
  'test-palette.R:198:3', 'test-palette.R:232:5', 'test-par.R:5:3',
  'test-par.R:15:3', 'test-paths.R:22:3', 'test-paths.R:46:3',
  'test-plot.R:17:3', 'test-plot.R:42:3', 'test-plot.R:67:3',
  'test-plot.R:105:3', 'test-plot.R:138:3', 'test-plot.R:145:3',
  'test-plot.R:160:3', 'test-plot.R:186:3', 'test-plot.R:197:3',
  'test-plot.R:234:3', 'test-plot.R:266:3', 'test-plot.shapes.R:136:5',
  'test-plot.shapes.R:164:3', 'test-plot.shapes.R:186:3',
  'test-plot.shapes.R:248:5', 'test-print.R:78:3', 'test-print.R:93:3',
  'test-print.R:111:3', 'test-print.R:126:3', 'test-print.R:142:3',
  'test-structural-properties.R:23:3', 'test-structural-properties.R:190:3',
  'test-structural-properties.R:210:3', 'test-structural-properties.R:768:3',
  'test-operators.R:252:3', 'test-trees.R:224:3',
  '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'
• nested igraph call handling not implemented yet (1):
  'test-structural-properties.R:174:3'
• {graph} is not installed (2): 'test-conversion.R:527:3',
  'test-conversion.R:555:3'
• {pcalg} is not installed (1): 'test-adjacency.R:20:3'

[ FAIL 0 | WARN 0 | SKIP 112 | PASS 5764 ]
Deleting unused snapshots:
• palette/categorical-palette-5-vertices.svg
• palette/categorical-palette-8-vertices.svg
• palette/diverging-palette.svg
• palette/sequential-palette.svg
• plot.shapes/edge-test-rectangle.svg
• plot.shapes/edge-test-square.svg
• plot.shapes/vertex-shape-crectangle.svg
• plot.shapes/vertex-shape-csquare.svg
• plot.shapes/vertex-shape-none.svg
• plot.shapes/vertex-shape-pie.svg
• plot.shapes/vertex-shape-rectangle.svg
• plot.shapes/vertex-shape-sphere.svg
• plot.shapes/vertex-shape-square.svg
• plot.shapes/vertex-shape-test-shape.svg
• plot.shapes/vertex-shape-vrectangle.svg
• plot/multi-loops-many.svg
• plot/standard-arrow-modes.svg
• plot/standard-arrow-sizes.svg
> 
> proc.time()
   user  system elapsed 
  12.93    0.65   37.53