R Under development (unstable) (2025-08-28 r88733 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(einops)

Attaching package: 'einops'

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

    repeat

> 
> testthat::test_check("einops")
[ FAIL 0 | WARN 0 | SKIP 36 | PASS 267 ]

══ Skipped tests (36) ══════════════════════════════════════════════════════════
• Tensor type torch_tensor's backend is not loadable (36):
  'test-compiler-backends.R:52:1', 'test-compiler-backends.R:62:1',
  'test-compiler-backends.R:87:1', 'test-parse_shape.R:115:1',
  'test-parse_shape.R:186:1', 'test-rearrange.R:22:5', 'test-rearrange.R:22:5',
  'test-rearrange.R:22:5', 'test-rearrange.R:22:5', 'test-rearrange.R:22:5',
  'test-rearrange.R:22:5', 'test-rearrange.R:22:5', 'test-rearrange.R:22:5',
  'test-rearrange.R:31:5', 'test-rearrange.R:31:5', 'test-rearrange.R:31:5',
  'test-rearrange.R:31:5', 'test-rearrange.R:31:5', 'test-rearrange.R:31:5',
  'test-rearrange.R:43:1', 'test-rearrange.R:89:1', 'test-rearrange.R:152:1',
  'test-reduce.R:10:9', 'test-reduce.R:10:9', 'test-reduce.R:10:9',
  'test-reduce.R:10:9', 'test-reduce.R:10:9', 'test-reduce.R:10:9',
  'test-reduce.R:10:9', 'test-reduce.R:10:9', 'test-reduce.R:10:9',
  'test-reduce.R:10:9', 'test-reduce.R:10:9', 'test-reduce.R:10:9',
  'test-repeat.R:26:1', 'test-repeat.R:39:1'

[ FAIL 0 | WARN 0 | SKIP 36 | PASS 267 ]
> 
> proc.time()
   user  system elapsed 
  13.42    3.89   17.25