R Under development (unstable) (2025-08-17 r88631 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(nat.templatebrains)
Loading required package: nat
Loading required package: rgl
Some nat functions depend on a CMTK installation. See ?cmtk and README.md for details.

Attaching package: 'nat'

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

    intersect, setdiff, union

> test_check("nat.templatebrains")
[ FAIL 0 | WARN 3 | SKIP 3 | PASS 64 ]

══ Skipped tests (3) ═══════════════════════════════════════════════════════════
• On CRAN (2): 'test-reg_repos.R:43:3', 'test-transformation.r:85:3'
• skipping transformation tests since CMTK is not installed (1):
  'test-transformation.r:184:3'

[ FAIL 0 | WARN 3 | SKIP 3 | PASS 64 ]
> 
> proc.time()
   user  system elapsed 
   2.14    0.40    2.53