R Under development (unstable) (2025-05-23 r88232 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> library(pkgbuild)
> 
> test_check("pkgbuild")
WARNING: Rtools is required to build R packages, but is not currently installed.

Please download and install the appropriate version of Rtools for 4.6.0 from
https://cran.r-project.org/bin/windows/Rtools/.
[ FAIL 0 | WARN 0 | SKIP 24 | PASS 123 ]

══ Skipped tests (24) ══════════════════════════════════════════════════════════
• On CRAN (23): 'test-archives.R:25:3', 'test-build-process.R:22:3',
  'test-build-process.R:42:3', 'test-build-process.R:86:5',
  'test-build.R:154:5', 'test-build.R:187:3', 'test-build.R:225:3',
  'test-compiler-flags.R:11:3', 'test-compiler.R:9:9', 'test-compiler.R:34:11',
  'test-exclude.R:10:3', 'test-exclude.R:28:3', 'test-exclude.R:72:3',
  'test-exclude.R:84:3', 'test-exclude.R:119:3', 'test-exclude.R:134:3',
  'test-exclude.R:143:3', 'test-exclude.R:151:3',
  'test-find-package-root.R:39:3', 'test-style.R:3:3', 'test-utils.R:24:3',
  'test-utils.R:86:3', 'test-withr.R:2:3'
• On Windows (1): 'test-exclude.R:161:3'

[ FAIL 0 | WARN 0 | SKIP 24 | PASS 123 ]
> 
> proc.time()
   user  system elapsed 
   4.53    1.32   48.56