R Under development (unstable) (2023-07-01 r84626 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> test_check("MetricGraph")
Loading required package: MetricGraph
The legacy packages maptools, rgdal, and rgeos, underpinning the sp package,
which was just loaded, will retire in October 2023.
Please refer to R-spatial evolution reports for details, especially
https://r-spatial.org/r/2023/05/15/evolution4.html.
It may be desirable to make the sf package available;
package maintainers should consider adding sf to Suggests:.
The sp package is now running under evolution status 2
     (status 2 uses the sf package in place of rgdal)

Attaching package: 'MetricGraph'

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

    t

[ FAIL 0 | WARN 1 | SKIP 1 | PASS 39 ]

══ Skipped tests (1) ═══════════════════════════════════════════════════════════
• On CRAN (1): 'test_cgeneric.R:3:1'

[ FAIL 0 | WARN 1 | SKIP 1 | PASS 39 ]
> 
> proc.time()
   user  system elapsed 
  13.03    0.59   13.62